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Engine Room Motor Plants

 

B On a diesel engine working on the four-stroke operating cycle, what engine feature ensures proper scavenging? Both the intake and exhaust valves are closed during the transition from the exhaust stroke to the intake stroke at top dead center. Both the intake and exhaust valves are open during the transition from the exhaust stroke to the intake stroke at top dead center. Both the intake and exhaust valves are closed during the transition from the exhaust stroke to the intake stroke at bottom dead center. Both the intake and exhaust valves are open during the transition from the exhaust stroke to the intake stroke at bottom dead center. New Motor Plants Questions 2016
C With respect to lubricating oil's viscosity and the bearing loading characteristics at the points of lubrication, what statement is true? The viscosity should be low enough to withstand the greatest anticipated torque load and low enough to minimize power losses. The viscosity should be high enough to withstand the greatest anticipated torque load and high enough to minimize power losses. The viscosity should be high enough to withstand the greatest anticipated torque load, but the viscosity should be low enough to minimize power losses. The viscosity should be low enough to withstand the greatest anticipated torque load, but the viscosity should be high enough to minimize power losses. New Motor Plants Questions 2016
C Which of the listed conditions could result in the failure of an auxiliary diesel engine to stop running when a normal shutdown is attempted? Supplying high temperature inlet air. Maintaining a high exhaust back pressure. Lube oil entering in the air intake manifold. Carbon buildup on the over speed pawl. New Motor Plants Questions 2016
C A diesel-generator governor is hunting. After changing the oil, the governor is flushed and the compensation needle valve is adjusted, but the hunting persists. You should NOW __________. set the speed droop adjustment to zero calibrate the fuel pump rack settings carefully check for binding in the governor linkage check air intake manifold pressure New Motor Plants Questions 2016
B When analyzing indicator card diagrams you are calculating the work output from the cylinder by obtaining the area within the curve of what type of diagram? pressure/temperature pressure/volume pressure/enthalpy temperature/entropy New Motor Plants Questions 2016
A As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action? Use a spring with a higher spring constant (k value) in the indicator. Reduce the RPM at which the readings are taken. Use a spring with a lower spring constant (k value) in the indicator. Increase the RPM at which the readings are taken. New Motor Plants Questions 2016
C What is a major initial ramification of receiving bunkers with a water content of 0.75% by volume? Vessel will have to use additional efforts to reduce the water content, the oily-water separators can deal with the discharge waste water. Economic loss of receiving less fuel, by volume, but still within ISO 8217:2010 fuel specifications. Loss of specific heating value of fuel's thus effecting fuel consumption and engine efficiency, as well as an economic loss. All water may be dealt with by proper use of centrifuges, thus not a significant onboard or economic/engineering problem. New Motor Plants Questions 2016
C You notice that the fuel oil sludge tank level is increasing at a higher than normal daily rate. The main engine fuel oil leakage tank has a normal level. What would you consider your first action to be? Lower fuel oil throughput through the fuel oil centrifuges. Increase the self-cleaning cycle interval times of the fuel oil centrifuges. Determine if the tank level rise is attributed to fuel or water. Change gravity disk on the fuel oil purifying centrifuge(s). New Motor Plants Questions 2016
C When operating the purifiers in "parallel", as shown in the illustration____________. Illustration MO-0077 valve "2" would be closed valve "3" would be closed valve "6" would be closed All of the above. New Motor Plants Questions 2016
D Which segment of the two-stroke cycle engine diagram shown represents the power stroke? Illustration MO-0037 I IV V VI New Motor Plants Questions 2016
A In a two-stroke cycle diesel engine, a Roots-type blower is usually __________. gear driven by the engine driven by an exhaust gas turbine actuated by the intake valves driven by separate motor New Motor Plants Questions 2016
D Following the failure of one turbocharger on a crosshead, propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? Lock the rotor of the damaged turbocharger. Secure cooling and lubrication to the damaged turbocharger. Blank off the exhaust gas inlet to the damaged turbocharger. All of the above. New Motor Plants Questions 2016
C What is a major initial ramification of receiving bunkers with a water content of 0.75% by volume? Vessel will have to use additional efforts to reduce the water content, the oily-water separators can deal with the discharge waste water. Economic loss of receiving less fuel, by volume, but still within ISO 8217:2010 fuel specifications. Loss of specific heating value of fuel's thus effecting fuel consumption and engine efficiency, as well as an economic loss. All water may be dealt with by proper use of centrifuges, thus not a significant onboard or economic/engineering problem. New Motor Plants Questions 2016
A In the illustration, the intake valve closes at what point on the four-stroke cycle engine diagram shown? Illustration MO-0084 45 degrees after BDC 55 degrees before BDC 75 degrees before TDC 85 degrees after TDC New Motor Plants Questions 2016
D Following the failure of one turbocharger on a propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? Lock the rotor of the damaged turbocharger. Secure cooling and lubrication to the damaged turbocharger. Blank off the exhaust gas inlet to the damaged turbocharger. All of the above. New Motor Plants Questions 2016
C What is a major initial ramification of receiving bunkers with a water content of 0.75% by volume? Vessel will have to use additional efforts to reduce the water content, the oily-water separators can deal with the discharge waste water. Economic loss of receiving less fuel, by volume, but still within ISO 8217:2010 fuel specifications. Loss of specific heating value of fuel's thus effecting fuel consumption and engine efficiency, as well as an economic loss. All water may be dealt with by proper use of centrifuges, thus not a significant onboard or economic/engineering problem. New Motor Plants Questions 2016
A Regularly taken indicator cards on a diesel engine provides relative engine performance data allowing engineers to compare to previous data and manufacturer's design. What are the two most important parameters obtained from reading the indicator cards? Pmax and Pcomp. Pmax and injection delay. Pmax and scavenging air pressure. Pcomp and injection timing. New Motor Plants Questions 2016
D Starting a diesel engine on diesel fuel during cold weather conditions will be made easier by __________. increasing the quantity of starting air increasing the lube oil pressure heating the engine fuel supply heating the engine coolant New Motor Plants Questions 2016
B You are onboard a vessel with a slow-speed crosshead type engine. The fuel just received has significantly lower sulfur content than the previous bunkers. Which of the following would be a concern due to the reduced sulfur content? Fuel injection temperature Base number of the cylinder oil Fuel supply system pressure Purifier gravity disk size New Motor Plants Questions 2016
A Many fuel oils generally have an upper average ash content of 0.1% by weight. Which of the following conditions could be expected if the ash content increases above this amount? Increased exhaust valve wear Increased MEP Excessive bearing wear Glazing of the cylinder liners New Motor Plants Questions 2016
C Most diesel engines use a duplex lube oil strainer to __________. decrease the time required between cleanings remove all large and small foreign objects ensure a positive flow of oil at all times ensure that all lube oil has been treated twice New Motor Plants Questions 2016
C Starting systems for large, direct reversing diesel engines are usually __________. hydraulic starting motors electric starting motors direct air admission vane type air motors New Motor Plants Questions 2016
D Which segment of the two-stroke cycle engine diagram shown in the illustration represents the exhaust event? Illustration MO-0037 I II III IV New Motor Plants Questions 2016
A Regularly taken indicator cards on a slow-speed diesel engine provides relative engine performance data allowing engineers to compare to previous data and manufacturer's design. What are the two most important parameters obtained from reading the indicator cards? Pmax and Pcomp. Pmax and injection delay. Pmax and scavenging air pressure. Pcomp and injection timing. New Motor Plants Questions 2016
A In a two-stroke cycle diesel engine, a Roots-type blower is usually __________. gear driven by the engine driven by an exhaust gas turbine actuated by the intake valves driven by separate motor New Motor Plants Questions 2016
D Wire brushing and scraping can be used to remove hard carbon deposits from exhaust system surfaces. When cleaning exhaust systems associated with the diesel engines on the supply boat to which you are assigned, what technique can effectively be used in conjunction with mechanical cleaning to loosen and soften up these hard carbon deposits? Treating with carbon tetrachloride solvent. Baking off carbon with heat lamps. Sand blasting with diamond dust. Treating with carbon penetrating solvent. New Motor Plants Questions 2017
D The fresh water cooling system self-contained, internally-sensing thermostatic temperature control valves fitted on the main engines of your towing vessel are configured as shown in the illustration. If the valve sleeve (item #4) as controlled by the thermostatic sensing element (item #7) is in the position as shown in the drawing, what statement is true? MO-0079 As shown, the actual engine fresh water outlet temperature must be at the temperature set point of the valve, thus sending a portion of the water flow through the fresh water cooler and the remainder in bypass of the cooler. As shown, it is not possible to determine what the relationship is between the actual engine fresh water outlet temperature and the temperature set point of the valve, and as such it is not possible to determine the flow pattern. As shown, the actual engine fresh water outlet temperature must be above the temperature set point of the valve, thus sending 100% of the water flow through the fresh water cooler. As shown, the actual engine fresh water outlet temperature must be below the temperature set point of the valve, thus diverting 100% of the water flow in bypass of the fresh water cooler. New Motor Plants Questions 2017
A The oil of a speed control governor on one of your OSV's main diesel engines is foaming excessively, and internally governor parts are sticking due to corrosion. What is the most likely cause? The oil is excessively contaminated with water. The type of oil used is incompatible with governor seals. The viscosity grade of the oil is improper for existing temperature conditions. The oil is excessively contaminated with solids. New Motor Plants Questions 2017
D In order to determine the restriction across a dry-type air filter on one of the diesel engines on your general purpose supply boat, the engine should be operating at rated speed and load. What instrument would give the most accurate measurement of air filter element restriction? A bourdon tube vacuum gauge. A bourdon tube compound gauge. A mercury manometer. A water manometer. New Motor Plants Questions 2017
A Which statement most accurately represents the requirements for softening hard carbon deposits associated with the burner atomizers of an auxiliary boiler as fitted on your towing vessel? Carbon should be softened by soaking in diesel fuel or kerosene. Carbon should be softened by soaking in sulfamic or hydrochloric acid. Carbon should be softened by blowing through with steam. Carbon should be softened by soaking in hot soapy water. New Motor Plants Questions 2017
B You are assigned to a towing vessel fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 900 rpm, what will be the rotational speed of the two camshafts? Illustration MP-MS-04 450 rpm 900 rpm 1800 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2017
C Some main propulsion diesel engine uses sea water to directly cool the __________. cylinder heads exhaust valves scavenging air injectors New Motor Plants Questions 2017
C The ship-docking tug to which you are assigned has main diesel engines fitted with intake and exhaust systems as shown in the illustration. Under what circumstances would the check valve open and bypass the rotary-lobe roots blower? Illustration MP-IX-10 The check valve opens when the engine is running under a relatively heavy load and the rotary-lobe roots blower discharge pressure is positive. The check valve opens when the engine is running under a relatively light load and the rotary- lobe roots blower discharge pressure is positive. The check valve opens when the engine is running under a relatively heavy load and the rotary-lobe roots blower discharge pressure is negative. The check valve opens when the engine is running under a relatively light load and the rotary- lobe roots blower discharge pressure is negative. New Motor Plants Questions 2017
B You are assigned to a twin-screw towing vessel fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. When do the intake valves open and close respectively? Illustration MO-0084 The intake valves open at bottom dead center at the end of the intake stroke. The intake valves close at top dead center at the beginning of the intake stroke. The intake valves open at 75o before top dead center on the exhaust stroke.The intake valves close at 45o after bottom dead center on the compression stroke. The intake valves open at top dead center at the beginning of the intake stroke. The intake valves close at bottom dead center at the end of the intake stroke. The intake valves open at 45o after bottom dead center on the compression stroke. The intake valves close at 75o before top dead center on the exhaust. New Motor Plants Questions 2017
B You are attempting to start a deck winch drive engine fitted with an electric cranking motor where the battery electrolyte is frozen. What should be done to facilitate starting? The engine should be started by means of jumper cables connected to another battery without any particular concern regarding the electrolyte being frozen. The battery electrolyte should be allowed to thaw, and then the battery should be recharged as necessary before attempting to start the engine. The battery electrolyte should be allowed to thaw, and then the battery electrolyte should be diluted with distilled water as necessary before attempting to start the engine. The battery electrolyte should be thawed by means of a battery charger, and then the battery should be recharged as necessary before attempting to start the engine. New Motor Plants Questions 2017
C A diesel generator set on your offshore supply boat has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the pressure drop becomes unacceptably high. When you rotate the cleaning handle you notice that it is extremely difficult to rotate. What should be done? Illustration MO-0057 After stopping the engine, the drain plug (B) should be removed to drain the accumulated sludge from the strainer sump. The cleaning handle (A) should be forced to rotate, even if it requires an extender handle to produce greater rotating torque. After stopping the engine, the strainer element should be withdrawn and soaked in solvent to break up the heavy deposits on the disk stack (C). No special consideration need be taken as long as the cleaning handle (A) rotates, even if it rotates with great difficulty. New Motor Plants Questions 2017
A The main propulsion diesel engines on the tug to which you are assigned are fitted with mechanically operated and controlled unit injectors. When are the sintered metal supply and return injector filters typically replaced? Whenever the unit injectors are removed for reconditioning. Whenever the fuel system secondary filter elements are replaced. Whenever the fuel system primary suction strainer is cleaned. Whenever the coalescing fuel filters are drained of sludge and moisture. New Motor Plants Questions 2017
D In preparation for getting a tug-barge unit underway, if enough time has elapsed since the last main engine shutdown, it may be necessary to blow down the engine's cylinders to expel any accumulated water or oil. What statement concerning cylinder blow down is true? The engine is rolled over with fuel delivery and with the cylinder test valves (indicator cocks) closed. The engine is rolled over with no fuel delivery and with the cylinder test valves (indicator cocks) closed. The engine is rolled over with fuel delivery and with the cylinder test valves (indicator cocks) open. The engine is rolled over with no fuel delivery and with the cylinder test valves (indicator cocks) open. New Motor Plants Questions 2017
B The anchor handling supply vessel to which you are assigned has diesel generators fitted with fuel injectors with the operating principle as shown in the illustration. In figure "B" which plunger rotation position corresponds to the engine running under no load at idle RPM? Illustration MP-FI-12 1 2 3 4 New Motor Plants Questions 2017
D You are assigned to a river push boat fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. What combustion cycle event has a duration of 103o? Illustration MP-TH-15 Compression Exhaust Intake Power New Motor Plants Questions 2017
A The towing vessel to which you are assigned is gear-driven with one main propulsion diesel engine and a fixed-pitch propeller. While underway, the main engine becomes disabled, requiring your vessel to be towed back into port. If pressurized lubricating oil is not available to the reduction gear shaft bearings, what must be done during the towing operation? The reduction gear output shaft must be prevented from rotating by means of locking the propeller shaft. The reduction gear input shaft must be prevented from rotating by means of engaging the engine turning gear at the flywheel. The reduction gear input shaft must be prevented from rotating my means of engaging the propulsion clutch. The reduction gear input and output shafts must be prevented from rotating by means of blocking the gear teeth. New Motor Plants Questions 2017
B You are on a river towboat using main propulsion engines of the type shown in the illustration. What statement represents the procedure for inspection of the lower cylinder liner bore while in place inside the engine? Illustration MP-MS-04 With the particular piston positioned at BDC and the corresponding oil pan hand hole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at TDC and the corresponding oil pan handhole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at BDC and the corresponding air box hand hole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at TDC and the corresponding air box hand hole cover removed, inspect the lower liner bore through the crankcase opening. New Motor Plants Questions 2017
C The main engines on your anchor handling supply boat utilize a starting system similar to that shown in the illustration. The air supply pressure and engine room ambient temperatures are both within the normal range. Upon attempted start-up, the engine turns very slowly, and the flow rate of air from the air starting motor exhaust is very low. Which of the listed conditions would most likely be the cause of the failure to start? Illustration MP-SR-13 The air-starting motor vanes are stuck in their slots. The in-line lubricator siphon tube is severely restricted. The in-line strainer basket element is severely restricted. The fuel injection system piping is air-bound. New Motor Plants Questions 2017
A The turbochargers on the main propulsion engines on the towing vessel to which you are assigned are fitted with an exhaust inlet screen to protect the turbocharger turbine. Upon inspection, pieces of broken piston rings or exhaust valves are found in the foreign object trap box. Why is it essential that this debris be removed prior to placing the engine back into operation? The debris may eventually break into smaller pieces allowing turbine foreign object damage. The debris may eventually cause the screen to become severely restricted. The debris will eventually become difficult to remove from the trap box. The debris will cause the turbine casing to become statically imbalanced. New Motor Plants Questions 2017
D You are analyzing the data used for trend analysis for a two-stroke main propulsion diesel engine on your river push boat. Although the engine has yet to experience a safety shutdown on high crankcase pressure, over time the crankcase pressure (which normally runs in a vacuum) has gradually become less negative. Which of the following failures would most likely be responsible for this condition? Leaking crankcase handhole cover. Burned cylinder exhaust valve. Dribbling injector needle valve. Worn piston compression rings. New Motor Plants Questions 2017
B A main diesel engine on your platform supply vessel has experienced a safety shutdown due to excessive crankcase pressure. What is the appropriate response? Immediately open the crankcase to make the necessary inspections to determine the cause of the high crankcase pressure safety shutdown. Allow 2 hours for the engine to cool before opening the crankcase, and determine and correct the cause of the trip before attempting to restart the engine. Allow the engine to cool off for two minutes, then restart and monitor the crankcase pressure to verify the cause of the shutdown. Immediately restart the engine, and monitor the crankcase pressure to verify the cause of the shutdown. New Motor Plants Questions 2017
A The ship-docking tug to which you are assigned is fitted with auxiliary diesel engines of the type shown in the illustration. In terms of valve operating gear and cylinder liner type, what statement is true? Illustration MP-HS-04 This is a pushrod operated overhead valve engine with wet cylinder liners. This is an overhead cam engine with wet cylinder liners. This is a pushrod operated overhead valve engine with jacketed cylinder liners. This is an overhead cam engine with jacketed cylinder liners. New Motor Plants Questions 2017
C Prior to starting a diesel generator engine fitted on your river push boat, the crankcase oil level must be checked. At what checked level would you be required to add make-up oil? When the oil level drops below the FULL mark on the dipstick. When the oil level drops to between the ADD and FULL marks on the dipstick. When the oil level drops below the ADD mark on the dipstick. When the oil level drops to where it is no longer visible on the dipstick. New Motor Plants Questions 2017
A The offshore supply vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The local/remote transfer valve at the engine room control station has a blocked remote port. The local/remote transfer valve at the engine room control station has a blocked local port. The attendance valve at the pneumatic remote control station has a blocked outlet port. The pilot house/remote transfer valve at the pilot house has a blocked remote port. New Motor Plants Questions 2017
A When preparing to change the oil of the speed control governor of one of the main propulsion engines on your towboat, you should consult the governor instruction manual to determine the proper viscosity of the oil to use. What is the primary factor that will determine the recommended viscosity? The operating oil temperature range of the governor. The speed range (from idle to maximum governed speed) of the engine. The output power of the governor as expressed in inch-pounds. The maximum rated power output of the engine. New Motor Plants Questions 2017
B An auxiliary diesel engine on your tug uses a starting system similar to the one shown in the illustration. The hand pump is capable of charging the accumulator to the pressure necessary to start the engine and the engine successfully starts. While running, the engine driven pump is not capable of maintaining the accumulator in a state of being fully charged. Which of the following is most likely to be the cause? Illustration MP-SR-05 The hydro-starter (C) pistons are worn. The engine driven pump (H) drive belt is broken. The unloading valve (I) is set for too high a pressure. The full-flow filter (G) is bypassing the element. New Motor Plants Questions 2017
B You are about to check the valve lash adjustment on #1 cylinder's intake and exhaust valves of an auxiliary diesel engine fitted on the ship-docking tug to which you are assigned. You want to adjust the valve lash on both valves without having to reposition the crankshaft between adjustments. What should be the position of #1 piston to insure both the intake and exhaust valves are both in a position to facilitate valve adjustment? The crankshaft should be barred in the direction of rotation with #1 piston at BDC having just completed a power stroke. The crankshaft should be barred in the direction of rotation with #1 piston at TDC having just completed a compression stroke. The crankshaft should be barred in the direction of rotation with #1 piston at BDC having just completed an intake stroke. The crankshaft should be barred in the direction of rotation with #1 piston at TDC having just completed an exhaust stroke. New Motor Plants Questions 2017
C Your oil platform supply vessel is fitted with a two-pass, fire-tube, oil-fired auxiliary boiler. What is the most practical way of determining if the outside surface of the boiler tubes are excessively scaled with hard scale deposits? Monitoring the feed pump pressures. Monitoring the circulating pump pressures. Measuring the outside diameter of the tubes. Performing a visual inspection. New Motor Plants Questions 2017
B The harbor tug to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the attached fuel oil pump and the hand priming fuel oil pump from discharging through the other, what other purpose do the anti-flood check valves serve? Illustration MP-FO-06 They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shutdown and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shutdown and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located below the engine. New Motor Plants Questions 2017
A Your offshore supply vessel is fitted with a coil-type, forced-circulation, water-tube, oil-fired auxiliary boiler. What is the most practical way of determining if the inside surface of the coil is excessively scaled with hard scale deposits? Monitoring the circulating pump pressures. Monitoring the feed pump pressures. Performing a visual inspection. Measuring the coil inside diameter. New Motor Plants Questions 2017
D A 4-stroke, medium-speed, eight cylinder, in-line diesel engine has a firing order of 1-5-2-6-8-4-7-3. When performing routine valve maintenance, #1 cylinder is set at TDC in firing position. Which exhaust valves can be checked for proper valve lash? 1, 3, 2, 7 1, 3, 2, 8 1, 5, 2, 4 1, 5, 2, 6 New Motor Plants Questions 2017
B The cetane number is the index used to measure a fuel oil's __________. antiknock characteristics ignition quality rate of vaporization viscosity New Motor Plants Questions 2017
B The multi-purpose supply vessel to which you are assigned is fitted with main propulsion reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear? Illustration MP-DS-16 This type of reduction gear is used with a controllable pitch propeller and a non-reversing engine. This type of reduction gear is used with a fixed pitch propeller and a non-reversing engine. This type of reduction gear is used with a fixed pitch propeller and a reversing engine. This type of reduction gear is used with a controllable pitch propeller and a reversing engine. New Motor Plants Questions 2017
C The various auxiliary diesel engines fitted on your sea-going tug may employ a variety of different starting systems. What type of starting system is shown in the illustration? Illustration MP-SR-05 Electric power operated system Gas engine power operated system Hydraulic power operated system Pneumatic power operated system New Motor Plants Questions 2017
D The main propulsion diesel engines used to power the ship-docking tug to which you are assigned are started with vane-type air-starting motors designed to operate at 250 psig. The in-line lubricator should provide 3 drops of oil per cranking minute, as long as the in-line lubricator oil viscosity is as specified. If the start air pressure is within the normal range and the oil viscosity is correct, but the oil injection rate is only 1 drop per minute, what should be done? The oil in the in-line lubricator should be replaced with oil of lower viscosity than specified. The starting air pressure supplied to the air-starting motors should be increased. The in-line lubricator oil injection metering needle valve should be further closed. The in-line lubricator oil injection metering needle valve should be further opened. New Motor Plants Questions 2017
D You suspect that a diesel generator set on your offshore supply boat has a misfiring cylinder because the engine, although warm, is running roughly. The six-cylinder engine is fitted with a high pressure distributor type pump with hydraulically operated injector nozzles. When you slacken the high pressure fuel line at #4 fuel injector nozzle, the engine runs even rougher than before. Upon re- tightening the high pressure fuel line fitting, the engine reverts back to the original roughness before the fitting was slackened. What does this indicate? #4 cylinder is misfiring. You have successfully located the misfiring cylinder. #4 cylinder is misfiring. Either #1, #2, or #3 cylinder is also misfiring. #4 cylinder is misfiring. Either #5 or #6 cylinder is also misfiring. #4 cylinder is firing properly. Any one of the other cylinders must be misfiring. New Motor Plants Questions 2017
D A main propulsion diesel engine on your anchor-handling supply boat has experienced a safety shutdown on high crankcase pressure which was accompanied by an alarm. After waiting 2 hours as recommended by the manufacturer, the crankcase is opened up and suitable repairs are accomplished. After re-closing the crankcase, the engine fails to start. Which of the following would account for this? The high crankcase pressure detector protective device must have its switch lever replaced first before the engine can be restarted. The high crankcase pressure detector protective device must have its diaphragm replaced first before the engine can be restarted. The high crankcase pressure detector protective device's pressure chamber must be evacuated with a vacuum pump first before the engine can be restarted. The high crankcase pressure detector protective device must be reset first before the engine can be restarted. New Motor Plants Questions 2017
A The main engines on your tug boat utilize a starting system similar to that shown in the illustration. When starting the engine, an excessive amount of oil mist exits the air starter exhaust port. Which of the listed conditions would account for this? Illustration MP-SR-13 The in-line lubricator needle valve degree of opening is excessive. The in-line lubricator siphon tube is excessively restricted. Excessive oil within the engine's cylinders is being pumped. The in-line lubricator needle valve degree of opening is insufficient. New Motor Plants Questions 2017
A You are assigned to a salvage tug fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 720 rpm, what will be the rotational speed of the two camshafts? Illustration MO-0005 360 rpm 720 rpm 1440 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2017
A A turbocharged, two-stroke cycle main propulsion diesel engine on your OSV is emitting gray to black smoke excessively from the stack. Upon comparing the measured air box pressure against a reference engine which is producing a clear stack, the measured air box pressure is determined to be too high. Which of the following conditions would most likely be the cause for the relatively high air box pressure? Scavenging air intake ports are excessively restricted with carbon deposits. Airside aluminium fins on after coolers are excessively restricted. Turbocharger over-running clutch failure. Turbocharger blower air intake filter is excessively restricted. New Motor Plants Questions 2017
A The main propulsion engines onboard your river push boat use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-14 Bypass filtration Sump filtration Shunt filtration Full-flow filtration New Motor Plants Questions 2017
D The winch drive engine on the harbor tug to which you are assigned is fitted with a Roots-type blower as shown in the illustration. What statement is true concerning this blower? Illustration MP-CA-09 Rotor "1" turns counter-clockwise, and rotor "2" turns clockwise. Area "3" is the suction passage, and area "4" is the discharge passage. Rotor "1" turns clockwise, and rotor "2" turns counter-clockwise. Area "3" is the discharge passage, and area "4" is the suction passage. Rotor "1" turns clockwise, and rotor "2" turns counter-clockwise. Area "3" is the suction passage, and area "4" is the discharge passage. Rotor "1" turns counter-clockwise, and rotor "2" turns clockwise. Area "3" is the discharge passage, and area "4" is the suction passage. New Motor Plants Questions 2017
B A diesel generator set on your ship-docking tug has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the inlet pressure is increasing and the outlet pressure is decreasing, resulting in an unacceptable pressure drop. What should be done? Illustration MO-0057 While the engine is running, the cleaning handle (A) should be rotated one-half turn to remove the accumulated dirt from the disk stack (C). While the engine is running, the cleaning handle (A) should be rotated one or more full turns to remove the accumulated dirt from the disk stack (C). While the engine is running, the drain plug (B) should be carefully loosened to drain the sludge from the strainer sump. The drain plug (B) is removed to drain the sludge from the strainer sump, but the engine must be stopped to perform this operation. New Motor Plants Questions 2017
B When interpreting the engine lube oil supply header pressures for the main engines on your OSV, what statement is true assuming that the lube oil pump is engine-driven? As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to decrease. As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to increase. As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to decrease. As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to increase. New Motor Plants Questions 2017
B In accordance with 46 CFR Subchapter J, which of the listed starting aids is acceptable for use with the emergency diesel-generator? Injection of ether into the air intake. Thermostatically controlled electric water jacket heater. Thermostatically controlled electric oil sump heater. Heating the starting battery. New Motor Plants Questions 2017
B The tank-type full-flow lubricating oil filter is situated on the discharge side of the engine-driven lube oil pump on the main engines on your sea-going tug. Assuming oil pressure readings are observed at constant engine rpm and lube oil temperature, what is the indication of gradually clogging filter elements as long as the bypass relief valve remains closed? The filter inlet AND outlet pressures BOTH gradually rise. The filter inlet pressure gradually rises, while the filter outlet pressure gradually drops. The filter inlet pressure gradually drops, while the filter outlet pressure gradually rises. The filter inlet AND outlet pressures BOTH gradually drop. New Motor Plants Questions 2017
D The thermal fluid heating oil system on your articulated tug-barge unit is configured similarly to that shown in the illustration. What system component performs expansion and deaeration functions? Illustration MP-SP-23 1 2 4 5 New Motor Plants Questions 2017
B You suspect that a diesel generator set on your OSV has a misfiring cylinder because the engine, although warm, is running roughly. The six-cylinder engine is fitted with a multi-plunger in-line high pressure fuel injection pump with hydraulically operated injector nozzles. When you slacken the high pressure fuel line fitting at #3 fuel injector nozzle, the engine continues to run roughly as before with no real change. Upon re-tightening the high pressure fuel line fitting, there is no real change, as the engine continues to run roughly as before. What does this indicate? Either #4, #5 or #6 cylinder is misfiring. #1 and #2 cylinders are firing properly. # 3 cylinder is misfiring. You have successfully located the misfiring cylinder. # 3 cylinder is firing properly. One of the other cylinders must be misfiring. Either #1 or #2 cylinder is misiring. #4, #5, and #6 cylinders are firing properly. New Motor Plants Questions 2017
D The general purpose supply boat to which you are assigned is equipped with airflex pneumatic tire friction type propulsion clutches. If it is required to replace a clutch friction shoe, what statement is true? All the clutch friction shoes should be replaced as a complete set, only if it is determined that more than half the shoes are determined to be excessively worn. When less than half the clutch friction shoes are determined to be excessively worn, replace half the clutch friction shoes installed in between the reused shoes. Replace only those clutch friction shoes that are determined to be excessively worn. All shoes that are determined not be be excessively worn may be reused regardless of the number. All the clutch friction shoes should be replaced as a complete set, even if only one clutch friction shoe is determined to be excessively worn. New Motor Plants Questions 2017
C You are assigned to a tractor tug with a drive system as shown in figure "A" of the illustration. What type of propulsion drive system is illustrated? Illustration MP-DS-09 Controllable pitch propeller drive Schottel-azimuthing drive (z-drive) Voith-Schneider drive Conventional fixed-propeller drive New Motor Plants Questions 2017
C A diesel generator set on your salvage tug has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the pressure drop becomes unacceptably high. When you rotate the cleaning handle you notice that it is extremely difficult to rotate. What should be done? Illustration MO-0057 The cleaning handle (A) should be forced to rotate, even if it requires an extender handle to produce greater rotating torque. No special consideration need be taken as long as the cleaning handle (A) rotates, even if it rotates with great difficulty. After stopping the engine, the strainer element should be withdrawn and soaked in solvent to break up the heavy deposits on the disk stack (C). After stopping the engine, the drain plug (B) should be removed to drain the accumulated sludge from the strainer sump. New Motor Plants Questions 2017
A The auxiliary oil-fired water-tube steam boiler on your anchor-handling supply vessel is equipped with a water column similar to that shown in the illustration. If the gauge glass becomes disabled or there is uncertainty associated with the gauge glass reading, the tri-cocks can be used to determine the boiler water level. What statement best describes the challenge associated with trying to differentiate between steam and water? Illustration MO-0093 On a tricock situated below the water level, when opened some of the escaping water will flash to steam. On a tricock situated above the water level, when opened all of the escaping steam will condense to water. On a tricock situated above the water level, when opened some of the escaping steam will condense to water. On a tricock situated below the water level, when opened all of the escaping water will flash to steam. New Motor Plants Questions 2017
C A "Blotter test" is a test performed on the lube oil of a diesel engine which can determine __________. the specific gravity of the oil the flash point of the oil a change in the oils viscosity the TBN number of the oil New Motor Plants Questions 2017
C The diesel generator engines onboard your ship-docking tug use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-05 Bypass filtration Shunt filtration Full-flow filtration Sump filtration New Motor Plants Questions 2017
C What maintenance practice represents the best protection against moisture carryover to the fuel injection system of the main engines on board your towing vessel? Closing the diesel oil day tank vents, particularly when the relative humidity is high. Frequently replacing fuel injection pump and injector nozzle inlet fuel filters. Periodically opening, then reclosing, the drain valve on coalescing type diesel oil filters. Periodically opening, then reclosing, the vent valve on coalescing type diesel oil filters. New Motor Plants Questions 2017
D You are analyzing the data used for trend analysis for one of the main propulsion diesel engines on the OSV to which you are assigned. The cylinder exhaust temperature of one of the cylinders is significantly lower than the others. When analyzing compression and firing pressure data, however, the numbers are within the normal range for this particular cylinder. What condition would produce these results? Excessive carbon build-up on air inlet ports or valves of affected cylinder. Leaking exhaust valve on affected cylinder. Leaking fuel injector needle valve for affected cylinder. Excessive carbon build-up on exhaust pyrometer probe of affected cylinder. New Motor Plants Questions 2017
C Due to environmental and safety concerns, the towing winch drive diesel engine cooling water system is treated with propylene glycol for protection against freezing. According to the illustration, what would be the limit of protection if 40 pints of propylene glycol are used in treating a cooling water system with a volumetric capacity of 10 gallons? Illustration MP-WC-04 10F -6F -30F -53F New Motor Plants Questions 2017
A The manufacturer of the diesel generator set drive engines used aboard your ship-docking tug recommends that no more than a 2 psig pressure drop across a fuel primary metal-edge suction strainer be allowed before recommended servicing. Assuming that the strainer inlet pressure is 4 psig, what would be the minimum allowable outlet pressure before recommended servicing? 2 psig 2" Hg 6 psig 6" Hg New Motor Plants Questions 2017
A Which of the following statements describes pertinent criteria for performing a surface blow for the purposes of removing excess chemicals and/or salinity as indicated by boiler water testing on an auxiliary steam boiler as fitted on your OSV? The surface blow would be performed when the boiler is steaming AND the level would be maintained above normal during the duration of the blow. The surface blow would be performed when the boiler is steaming AND the level would be maintained normal during the duration of the blow. The surface blow would be performed when the boiler is secured AND the level would be maintained above normal during the duration of the blow. The surface blow would be performed when the boiler is secured AND the level would be maintained normal during the duration of the blow. New Motor Plants Questions 2017
B The main engines on your harbor tug are protected with a low crankcase oil level detector protective device designed to provide an alarm when the main sump oil level drops below a certain level. It is malfunctioning, and upon investigation you determine from the technical manual that the oil level detector is a sealed unit. What statement best represents the best strategy to remedy this situation? The oil level detector seals must be broken before adjustments can be made, as long as new seals are established before placing the unit back into operation. The oil level detector must be replaced with a new detector if it is found to be defective, since field adjustments are not possible on this type of unit. The oil level detector is adjusted just as if it was an unsealed unit, but the seals must be re- established before placing the unit back into operation. The oil level detector is adjusted just as if it was an unsealed unit, without regard to any seals associated with the unit. New Motor Plants Questions 2017
B The ship-docking tug to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A" which plunger travel position corresponds to when fuel injection begins? Illustration MP-FI-12 1 2 3 4 New Motor Plants Questions 2017
B Your offshore supply boat is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. What heat exchanger or cooler location would most likely be fitted with sacrificial zinc anodes which must be periodically inspected and replaced when sufficiently deteriorated? Illustration MP-CW-15 Lube oil cooler water box. RW/FW heat exchanger water box. Lube oil cooler shell. RW/FW heat exchanger shell. New Motor Plants Questions 2017
A The fresh water cooling systems serving the main engines on your platform supply vessel are configured as shown in the illustration. While the effected main engine is in operation, what would be the impact of RW/FW heat exchanger and lube oil cooler tube leaks respectively? Illustration MP-CW-15 A RW/FW heat exchanger tube leak will result in engine fresh water coolant leaking into the raw water and out to sea as evidenced by a drop in the fresh water expansion tank level. A lube oil cooler tube leak will result in lubricating oil leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level and a drop in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in engine fresh water coolant leaking into the raw water and out to sea as evidenced by a drop in the fresh water expansion tank level. A lube oil cooler tube leak will result in engine fresh water coolant leaking into the engine lubricating oil as evidenced by a drop in the fresh water expansion tank level and a rise in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in raw water leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level. A lube oil cooler tube leak will result in engine fresh water coolant leaking into the engine lubricating oil as evidenced by a drop in the fresh water expansion tank level and a rise in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in raw water leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level. A lube oil cooler tube leak will result in lubricating oil leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level and a drop in the engine lube oil sump level. New Motor Plants Questions 2017
D The ship-docking tug to which you are assigned has main engines fitted with injectors similar to those shown in the illustration. What statement is true concerning the operating principle of this type of injector? Illustration MP-FI-22 The fuel pressure within the annulus and the compression load on the spring are both needle valve opening forces. The fuel pressure within the annulus is a needle valve closing force, the compression load on the spring is a needle valve opening force. The fuel pressure within the annulus and the compression load on the spring are both needle valve closing forces. The fuel pressure within the annulus is a needle valve opening force, the compression load on the spring is a needle valve closing force. New Motor Plants Questions 2017
A You suspect that a diesel generator set on your salvage tug has a defective unit injector because the engine, although warm, is running roughly. The two-stroke engine is fitted with mechanically operated unit injectors. When you push and hold down the No. 3 cylinder injector follower, there is no real change, as the engine continues to run roughly as before. What does this indicate? The No. 3 cylinder unit injector is faulty. You have successfully isolated the faulty unit injector. The No. 3 cylinder unit injector is functioning properly. One of the other cylinder unit injectors must be faulty. Either the No. 1 or No. 2 cylinder unit injector is faulty. The No. 4, No. 5 and No. 6 cylinder unit injectors are functioning properly. Either the No. 4, No. 5, or No. 6 cylinder unit injector is faulty. The No. 1 and No. 2 cylinder unit injectors are functioning properly. New Motor Plants Questions 2017
B A generator drive diesel engine on your general-purpose supply vessel has a misfiring cylinder. After further investigation it has been determined that the injector nozzle for the effected cylinder is faulty. After replacing the injector nozzle with a reconditioned or new one, the injector must be bled of air. Assuming the fuel injection pump is of the in-line multi-plunger type, how is this done? The engine is cranked over with the starter, and the high pressure fuel line fitting at the delivery valve is loosened with the fuel control rack in the no fuel position. The engine is cranked over with the starter and the high pressure fuel line fitting at the injector nozzle is loosened with the fuel control rack in the full fuel position. The engine is cranked over with the starter, and the high pressure fuel line fitting at the injector nozzle is loosened with the fuel control rack in the no fuel position. The engine is cranked over with the starter, and the high pressure fuel line fitting at the delivery valve is loosened with the fuel control rack in the full fuel position. New Motor Plants Questions 2017
A The generator drive diesel engines on your river push boat are fitted with a multi-plunger injection pump with high pressure fuel lines leading to each hydraulically operated injector. If the engine is allowed to run out of fuel, it may become necessary to purge the high pressure fuel lines of air. How is this accomplished? Slackening each high pressure fuel line fitting at the fuel injector while cranking over the engine with the starter and allowing air to escape, then retightening when a solid stream of fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while cranking over the engine with the starter and allowing air to escape, then retightening when air bubbly fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while stroking the manually operated priming pump and allowing air to escape, then retightening when a solid stream of fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while stroking the manually operated priming pump and allowing air to escape, then retightening when bubbly fuel is observed. New Motor Plants Questions 2017
D The main engines on the harbor tug to which you are assigned are fitted with duplex secondary spin- on fuel filters. Concerning the selector handle, what statement is true? The selector handle is normally placed in the "BOTH" position regardless of the load or rpm on the engine in order to be able to double the fuel handling throughput at any load or rpm and allow the engine speed to be changed without worrying about the selector handle position. The selector handle is placed in the "BOTH" position when the engine is running at low load or rpm. When the engine is running at high load or rpm, the selector handle is placed in either the "1" or "2" position depending upon which filter element is clean. The selector handle is placed in the "BOTH" position when the engine is running at high load or rpm to accommodate higher fuel delivery requirements. When the engine is running at low load or rpm, the selector handle is placed in either the "1" or "2" position. The selector handle is placed in either position the "1" or "2" position regardless of the load or rpm on the engine. The selector handle is temporarily placed in the "BOTH" position only when transitioning from a restricted filter element over to a clean filter element. New Motor Plants Questions 2017
A Assuming the use of ultra low sulfur content diesel fuel, what combination of arrangements associated with offshore supply vessel main engine configurations would result in the most accelerated corrosion of the inside wall of an exhaust manifold of a main propulsion diesel engine? Where the main engine operates on the four-stroke cycle and the exhaust manifold is uncooled. Where the main engine operates on the four-stroke cycle and the exhaust manifold is water- jacketed. Where the main engine operates on the two-stroke cycle and the exhaust manifold is uncooled. Where the main engine operates on the two-stroke cycle and the exhaust manifold is water- jacketed. New Motor Plants Questions 2017
D The rated speed of the main propulsion diesel engines on your towing vessel is 900 rpm. The installed centrifugal over speed trip device similar to the one shown in the illustration is designed to shutdown the engine at 110% of rated speed. Upon testing the over speed trip device, you determine that the actual shutdown occurs at 945 rpm. Which of the following would account for this? Illustration MP-SF-06 The throw-out weight (item 10) link bolt (item 15 and 16) is binding within the spring guide (item 14) drilling. The throw-out weight (item 10) pivot bolt (not labeled) is binding within the counterweight (item 1 through 9) drilling. The compression spring (item 12) was excessively compressed when the over speed trip was last set. The jam nut was not properly tightened against the adjusting nut (items 13) when the over speed trip was last set. New Motor Plants Questions 2017
D You suspect that a diesel generator set on your ocean-going tug has a faulty unit injector because the engine, although warm, is running roughly. The two-stroke six-cylinder engine is fitted with mechanically operated unit injectors. When you push and hold down the injector follower of the No. 4 unit injector, the engine runs even rougher than before. What does this indicate? The No. 4 cylinder unit injector is faulty. You have successfully isolated the faulty cylinder unit injector. The No. 4 cylinder unit injector is faulty. Either No. 1, No. 2, or No. 3 cylinder unit injector is also faulty. The No. 4 cylinder unit injector is faulty. Either No. 5 or No. 6 cylinder unit injector is also faulty. The No. 4 cylinder unit injector is functioning properly. Any one of the other unit injectors must be faulty. New Motor Plants Questions 2017
B An air box fire on a turbocharged, two-stroke cycle main propulsion engine as fitted on your general purpose supply vessel can cause the destruction of a turbocharger due to overheat and overspeed. Upon inspection, besides blistering of paint on handhole covers, what is distinctive evidence that an air box fire had occurred? The complete absence of any residue or accumulations. The presence of white ash residue within the air box. The presence of heavy oil accumulations within the air box. The presence of heavy soot accumulations within the air box. New Motor Plants Questions 2017
B The diesel generator set engines on the towing vessel to which you are assigned are fitted with coalescing fuel filters, each fitted with a glass bowl. Assuming that the processed fuel is contaminated with solid impurities and entrained water, what would be the appearance of the bowl with the engine shutdown and no fuel flowing? The solids would settle at the very bottom of the bowl, with a layer of clean fuel above that. Above the clean fuel layer would be a layer of water up to the top of the bowl. The solids would settle at the very bottom of the bowl, with a layer of water above that. Above the water layer would be a layer of clean fuel up to the top of the bowl. The solids would float to the very top of the bowl, with a layer of water below that. Below the water layer would be a layer of clean fuel down to the bottom of the bowl. The solids would float to the very top of the bowl, with a layer of clean fuel below that. Below the clean fuel layer would be a layer of water down to the bottom of the bowl. New Motor Plants Questions 2017
B The river push boat to which you are assigned has diesel generators fitted with fuel injectors of the type shown in figure "2" of the illustration. What statement is true concerning this type of injector? Illustration MP-FI-20 The injector is of the closed type and features pressure-time metering. The injector is of the closed type and features port and helix metering. The injector is of the open type and features pressure-time metering. The injector is of the open type and features port and helix metering. New Motor Plants Questions 2017
C The turbocharged, four-stroke, main propulsion diesel engines on your towing vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators? The engine should be running at idle RPM with minimal load (propulsion clutch engaged). The engine should be running at rated RPM with no load (propulsion clutch disengaged). The engine should be running at rated RPM with full load (propulsion clutch engaged). The engine should be running at idle RPM with no load (propulsion clutch disengaged). New Motor Plants Questions 2017
B What physical property of low sulfur distillate fuel can result in operational difficulties? Lower heat content results in higher fuel consumption. Lack of lubricity in the fuel can result in sticking/scuffing of fuel pump plungers and injector nozzles. Higher zinc content precipitates out sludge. Increased viscosity requires additional heating. New Motor Plants Questions 2017
B In preparation for getting an offshore anchor handling vessel underway, what is the primary factor to consider in determining when it is prudent to increase the main propulsion engine rpm above idle and place a load on the engine? (Assume that there are no starting aids.) The engine crankcase lubricating oil temperature. The cylinder jacket cooling water temperature. The cylinder jacket cooling water expansion tank level. The cylinder jacket cooling water pump pressure. New Motor Plants Questions 2017
B Various diesel engines onboard your salvage tug are started by means of either vane-type or air- turbine air-starting motors. At a minimum, in the absence of automatic drain valves, how often should moisture separators be drained of moisture while the vessel is underway? Hourly Daily Weekly Monthly New Motor Plants Questions 2017
D Assuming the use of low sulfur content diesel fuel, what combination of conditions associated with tugboat engine room operations would most contribute to internal corrosion of exhaust systems? High ambient temperature and high engine load. Low ambient temperature and high engine load. High ambient temperature and low engine load. Low ambient temperature and low engine load. New Motor Plants Questions 2017
C The harbor tug to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. All propulsion controls function properly from all locations with the exception of the pneumatic remote control station. Here the propulsion engine will run only at idle and neither propulsion clutch will engage regardless of the throttle lever control position. Which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The throttle lever control at the pneumatic remote control station has a blocked speed signal pilot air port. The attendance valve at the pilot house pneumatic master control station has a blocked outlet port. The pilot house/remote transfer valve at the pilot house pneumatic master control station has a blocked remote port. The local/remote transfer valve at the engine room control station has a blocked remote port. New Motor Plants Questions 2017
B A diesel engine on your salvage tug has a restricted exhaust silencer/muffler resulting in high exhaust back pressure. With an appreciable load on the engine, what would be the condition of the exhaust gases exiting the stack? White smoke Gray to black smoke Bluish tinge smoke Clear with no smoke New Motor Plants Questions 2017
B Both crosshead type and trunk type lubricating oil are received onboard a vessel. These two oils cannot be interchanged due to which of the following reasons? Crosshead type lubricating oil has a lower pour point Crosshead type lubricating oil has a lower base number as it does not need to neutralize the combustion by-products Trunk type lubricating oil has a higher flash point Crosshead type engine oil scraper rings are designed for a certain oil type New Motor Plants Questions 2017
A The fresh water cooling systems of the main engines on your towing vessel are configured as shown in the illustration. During normal engine operation which of the listed fresh water temperature locations would indicate the highest temperature? MP-CW-15 Fresh water inlet to the RW/FW heat exchanger Fresh water outlet from the lube oil cooler Fresh water outlet from the RW/FW heat exchanger Fresh water inlet to the lube oil cooler New Motor Plants Questions 2017
A The lubricating oil system supporting the main propulsion reduction gear on your offshore supply vessel is fitted with a lube oil strainer as shown in the illustration. How often should the handle "A" be rotated for cleaning purposes? Illustration MO-0057 Once per watch while underway. Once per month. Once every six months. Once per year. New Motor Plants Questions 2017
D You are on a slow-speed diesel engine vessel equipped with an ALCAP fuel oil purification system. You notice an increase in the water drained from the service tank bottom drain. One of the first items to check on your system would be which of the following? The closing water solenoid valve in the fresh water line. The water transducer located in the dirty oil supply line. The bowl RPM. The water transducer located in the clean oil discharge line. New Motor Plants Questions 2017
B The auxiliary engines on the offshore supply vessel to which you are assigned are fitted with Roots- blowers as shown in the illustration. What statement is true concerning the timing gears as shown in figure "A"? Illustration MP-CA-12 The timing gears are straight cut and insure that the blower is properly timed to the engine's crankshaft. The timing gears are helically cut and insure that the blower rotor lobes are properly spaced apart with a close tolerance. The timing gears are helically cut and insure that the blower is properly timed to the engine's crankshaft. The timing gears are straight cut and insure that the blower rotor lobes are properly spaced apart with a close tolerance. New Motor Plants Questions 2017
D The fresh water cooling systems serving the main engines on your sea-going tug are configured as shown in the illustration. While the effected main engine is in operation, what would be the impact of RW/FW heat exchanger and lube oil cooler tube leaks respectively? MP-CW-15 A RW/FW heat exchanger tube leak will result in engine fresh water coolant leaking into the raw water and out to sea as evidenced by a drop in the fresh water expansion tank level. A lube oil cooler tube leak will result in engine fresh water coolant leaking into the engine lubricating oil as evidenced by a drop in the fresh water expansion tank level and a rise in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in raw water leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level. A lube oil cooler tube leak will result in lubricating oil leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level and a drop in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in raw water leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level. A lube oil cooler tube leak will result in engine fresh water coolant leaking into the engine lubricating oil as evidenced by a drop in the fresh water expansion tank level and a rise in the engine lube oil sump level. A RW/FW heat exchanger tube leak will result in engine fresh water coolant leaking into the raw water and out to sea as evidenced by a drop in the fresh water expansion tank level. A lube oil cooler tube leak will result in lubricating oil leaking into the engine fresh water coolant as evidenced by a rise in the fresh water expansion tank level and a drop in the engine lube oil sump level. New Motor Plants Questions 2017
B For an OSV operating within U.S. territorial waters, what type of fuel is generally used on auxiliary and main propulsion high speed diesel engines? Residual fuel oil Distillate fuel oil Heavy fuel oil Blended fuel oil New Motor Plants Questions 2017
A In accordance with 46 CFR Subchapter F, diesel fuel oil system valves for removing water or impurities are __________. permitted, provided they are fitted with caps or plugs required, if there are no separators installed on board not required, provided there is a high and low tank suction strictly prohibited New Motor Plants Questions 2017
A The diesel generators on the river pushboat to which you are assigned are fitted with a charge air system as shown in the illustration. What statement is true concerning this type of charge air system? Illustration MP-CA-10 The scavenging blower is a positive displacement type, and the actual displacement is directly proportional to engine speed. The scavenging blower is a non-positive displacement type, and the actual displacement is not directly proportional to engine speed. The scavenging blower is a positive displacement type, and the actual displacement is not directly proportional to engine speed. The scavenging blower is a non-positive displacement type, and the actual displacement is directly proportional to engine speed. New Motor Plants Questions 2017
D When checking the valve stem to rocker arm clearances on an auxiliary diesel engine onboard your harbor tug, which of the following statements concerning intake and exhaust clearances when taken cold is correct? When taken cold, a properly adjusted exhaust valve clearance would definitely be equal to the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance would definitely be less than the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance could be less than or greater than the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance would definitely be greater than the intake valve clearance. New Motor Plants Questions 2017
D In a closed, re-circulating fresh water cooling system used for the main engines on your oil platform supply vessel, what function would chemical treatment with molybdate primarily perform? Boiling point elevation. Biological growth inhibition. Freezing point depression. Corrosion inhibition. New Motor Plants Questions 2017
D In terms of the diesel fuels burned in auxiliary and main propulsion diesel engines used on board towing vessels, which of the listed fuel properties would be most critical to consider when transferring and forwarding fuel in extremely low ambient temperature conditions? Ash content Flash point Heating value Pour point New Motor Plants Questions 2017
B The two-stroke cycle main propulsion engines on the river pushboat to which you are assigned are fitted with Roots-type blowers for scavenging purposes. Upon inspection of the air boxes, what condition would indicate a need to replace the Roots-type blower immediately? Iron dust residue Aluminum dust residue Oil accumulations Water accumulations New Motor Plants Questions 2017
C When entering a ECA, when should you begin the changeover to low sulphur fuel on a slow-speed diesel vessel? At Arrival. An hour before crossing the demarcation line for low sulphur fuel. In sufficient time to ensure the engine is burning a fuel mixture of sufficiently low sulphur to meet the regulatory requirement. When the vessel crosses the demarcation line. New Motor Plants Questions 2017
D A main propulsion diesel engine on your offshore supply boat produces white smoke under all load conditions. What condition would most likely account for this? Leaking exhaust piping expansion joints. Excessively restricted exhaust silencer/muffler. Excessively worn exhaust valve guides. Leaking exhaust manifold cooling water jackets. New Motor Plants Questions 2017
B A Roots-blown, two-stroke cycle main propulsion engine on the ship-docking tug to which you are assigned is emitting excessive bluish-tinged smoke from the stack. Further investigation reveals excessive lube oil consumption. What condition would most likely account for this? Restricted blower air intake filter. Worn blower rotor shaft seals. Restricted scavenging air intake ports. Leaking fuel injector needle valve. New Motor Plants Questions 2017
C The ship-docking tug to which you are assigned has diesel generators fitted with unit injectors with the operating principle as shown in the illustration. What statement is true concerning the beginning and ending of injection? Illustration MP-FI-12 Injection begins when the lower fuel port is covered by the lower helix of the upward moving plunger, and injection ends when the upper fuel port is uncovered by the upper helix of the upward moving plunger. Injection begins when the lower fuel port is covered by the lower helix of the downward moving plunger, and injection ends when the upper fuel port is uncovered by the upper helix of the downward moving plunger. Injection begins when the upper fuel port is covered by the upper helix of the downward moving plunger, and injection ends when the lower fuel port is uncovered by the lower helix of the downward moving plunger. Injection begins when the upper fuel port is covered by the upper helix of the upward moving plunger, and injection ends when the lower fuel port is uncovered by the lower helix of the upward moving plunger. New Motor Plants Questions 2017
A An engine that runs rough or expels large amounts of black smoke may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your river push boat have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high pressure fuel injection line fitting at the injector nozzle while the engine is running and noting the engine response. If before the injector is disabled the engine is running rough and expelling large amounts of black smoke and after the injector is disabled, the engine continues to run equally rough, but the engine now produces a clear stack, what is indicated? This indicates that the cylinder associated with the disabled injector is misfiring, but all other injectors are firing properly. This indicates that the cylinder associated with the disabled injector is firing properly, but at least one other injector is misfiring. This indicates that the cylinder associated with the disabled injector is misfiring, and at least one other injector is misfiring. This indicates that the cylinder associated with the disabled injector is firing properly, and all other injectors are firing properly. New Motor Plants Questions 2017
B The manufacturer of the diesel generator set drive engines used aboard your anchor-handling supply vessel recommends that no more than a 2 psig pressure drop across a fuel primary metal- edge suction strainer be allowed before recommended servicing. Assuming that the strainer inlet pressure is 4 psig, what would be the minimum allowable outlet pressure before recommended servicing? 2" Hg 2 psig 6 psig 6" Hg New Motor Plants Questions 2017
B You are assigned to a tractor tug with a drive system as shown in figure "B" of the illustration. What type of propulsion drive system is illustrated? Illustration MP-DS-09 Conventional fixed-propeller drive Schottel-azimuthing drive (z-drive) Controllable pitch propeller drive Voith-Schneider drive New Motor Plants Questions 2017
A The lubricating oil system supporting the main propulsion reduction gear on the harbor tug to which you are assigned is fitted with a lube oil strainer as shown in the illustration. Which of the following maintenance actions is performed most often in terms of frequency? Illustration MO-0057 Rotating the cleaning handle "A". Draining of the sump by removal of drain plug "B". Removal of straining element "C" and cleaning/soaking in kerosene. Removal of sump "D" to facilitate visual inspection of straining element. New Motor Plants Questions 2017
D The rated speed of the main propulsion diesel engines on your offshore supply vessel is 900 rpm. The installed centrifugal overspeed trip device similar to the one shown in the illustration is designed to shutdown the engine at 110% of rated speed. Upon testing the overspeed trip device, you determine that the actual shutdown occurs at 945 rpm. Which of the following would account for this? Illustration MO-0101 The throw-out weight (item #10) pivot bolt (not labelled) is binding within the counterweight (item 1 through 9) drilling. The throw-out weight (item #10) link bolt (item #15 & #16) is binding within the spring guide (item #11) drilling. The compression spring (item #12) was excessively compressed when the overspeed trip was last set. The jam nut (item #14) was not properly tightened against the adjusting nut (items #13) when the overspeed trip was last set. New Motor Plants Questions 2017
B A main propulsion reversing reduction gear unit on your river pushboat is fitted with wet-type duplex multiple-plate type clutches. When in the neutral position, the output shaft continues to turn. Which of the following listed conditions would most likely be responsible for this? Excessively leaking shaft seals Excessively warped clutch discs Excessively high clutch oil pressure Excessively high reduction gear reservoir oil level New Motor Plants Questions 2017
D The four-stroke cycle, turbocharged main propulsion engines on your anchor-handling supply vessel are fitted with after coolers for the purposes of increasing the air charge density and total power output. The after cooler air ducts must be periodically drained to remove accumulated condensation. What combination of conditions dictate more frequent draining? High ambient temperature and high engine load. Low ambient temperature and high engine load. High ambient temperature and low engine load. Low ambient temperature and low engine load. New Motor Plants Questions 2017
B The main propulsion engines onboard your river push boat use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-09 Full-flow filtration Sump filtration Bypass filtration Shunt filtration New Motor Plants Questions 2017
C A main propulsion diesel engine on your anchor-handling supply vessel produces gray to black smoke under virtually all load conditions as observed at the stack. The heavier the load on the engine, the darker the smoke becomes. What condition would most likely account for this? Leaking exhaust piping expansion joints. Excessively worn exhaust valve guides. Excessively restricted exhaust silencer/muffler. Leaking exhaust manifold cooling water jackets. New Motor Plants Questions 2017
B In accordance with 46 CFR Subchapter J, which of the listed starting aids is acceptable for use with the emergency diesel-generator? Injection of ether into the air intake. Thermostatically controlled electric water jacket heater. Thermostatically controlled electric oil sump heater. Heating the starting battery. New Motor Plants Questions 2017
A The oil of a speed control governor on one of your tug's main diesel engines is foaming excessively, and internally governor parts are sticking due to corrosion. What is the most likely cause? The oil is excessively contaminated with water. The type of oil used is incompatible with governor seals. The viscosity grade of the oil is improper for existing temperature conditions. The oil is excessively contaminated with solids. New Motor Plants Questions 2017
C The salvage tug to which you are assigned has a pneumatic propulsion control system as shown in the illustration. When the mechanical slave remote control station is being used to control propulsion, what is the direct result of positioning the control lever in the ahead direction? Illustration MP-IC-12 Movement of the mechanical slave remote control station lever directly shifts the engine room control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. Movement of the mechanical slave remote control station lever directly shifts the pneumatic remote control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. Movement of the mechanical slave remote control station lever directly shifts the pilot house pneumatic master control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. Movement of the mechanical slave remote control station lever directly shifts the clutch actuator 4-way control valve to the ahead direction by the action of a chain or cable. New Motor Plants Questions 2017
A A main propulsion diesel engine on your ship docking tug has experienced a safety shutdown due to high lubricating oil temperature. What is the appropriate response? Allow 2 hours for the engine to cool down before attempting to inspect the engine and correct the cause of the trip before attempting to restart the engine. Immediately perform the engine inspections to determine the cause of the high oil temperature safety shutdown. Immediately restart the engine, and monitor the oil temperature to verify the cause of the shutdown. Allow the engine to cool off for two minutes, then restart and monitor the lubricating oil temperature to verify the cause of the shutdown. New Motor Plants Questions 2017
A The pneumatic propulsion control system used on your integrated tug-barge unit uses a diaphragm- operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for lubrication upon reassembly? Illustration MO-0052 O-rings should be lubricated with a silicone-based grease. O-rings should be lubricated with penetrating oil. O-rings should be lubricated with dessicant powder. O-rings should not be lubricated by any means. New Motor Plants Questions 2017
A You are assigned to an offshore supply vessel fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 720 rpm, what will be the rotational speed of the two camshafts? Illustration MO-0005 360 rpm 720 rpm 1440 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2017
C In a closed, re-circulating fresh water cooling system used for the diesel generators on your coastwise towing vessel, what function would chemical treatment with organic phosphates primarily perform? Corrosion inhibition. Biological growth inhibition. Scale control and suppression. Freezing point depression. New Motor Plants Questions 2017
D The main propulsion diesel engines fitted on your anchor handling vessel are equipped with engine crankcase oil level dipsticks marked on both sides of the dipstick. What is the significance of the markings? The add and full marks on both sides correspond to one another and are identically placed. Either side can be used accurately no matter what is the running status of the engine and what is the temperature of the oil. The add and full marks on one side correspond to the side to be used when the engine is running at IDLE RPM and the engine oil is COLD. On the other side, the marks correspond to side to be used when the engine is running at MAXIMUM RPM and the engine oil is HOT. The add and full marks on one side correspond to the side to be used when the engine is STOPPED and the engine oil is HOT. On the other side, the marks correspond to side to be used when the engine is running at IDLE RPM and the engine oil is COLD. The add and full marks on one side correspond to the side to be used when the engine is STOPPED and the engine oil is COLD. On the other side, the marks correspond to side to be used when the engine is running at IDLE RPM and the engine oil is HOT. New Motor Plants Questions 2017
B The towing vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The attendance valve at the pneumatic remote control station has a blocked outlet port. The local/remote transfer valve at the engine room control station has a blocked remote port. The pilot house/remote transfer valve at the pilot house has a blocked remote port. The local/remote transfer valve at the engine room control station has a blocked local port. New Motor Plants Questions 2017
A The fire pump drive engine on the salvage tug to which you are assigned is fitted with a turbocharger as shown in the illustration. What statement is true concerning this type of turbocharger? Illustration MP-CA-06 The turbocharger is fitted with a radial flow turbine and inboard shaft bearings. The turbocharger is fitted with an axial flow turbine and outboard shaft bearings. The turbocharger is fitted with an axial flow turbine and inboard shaft bearings. The turbocharger is fitted with a radial flow turbine and outboard shaft bearings. New Motor Plants Questions 2017
C The main engines on your ocean-going salvage tug are fitted with speed control governors of the type shown in the illustration. If the shutdown solenoid is de-energized during normal operation, which of the following scenarios depicts the response on a safety shutdown where the shutdown plunger rod moves downward unseating the ball check valve when the shutdown solenoid energizes? Illustration MP-IC-14 The servo piston rod moves downward. The power cylinder tailrod moves downward. The servo piston rod moves upward. The power cylinder tailrod moves upward. The servo piston rod moves upward. The power cylinder tailrod moves downward. The servo piston rod moves downward. The power cylinder tailrod moves upward. New Motor Plants Questions 2017
B In terms of the diesel fuels burned in auxiliary and main propulsion diesel engines on general purpose offshore supply vessels, which of the listed fuel properties would be most critical to consider when transferring and forwarding fuel in extremely low ambient temperature conditions? Ash content Pour point Flash point Heating value New Motor Plants Questions 2017
C The main propulsion diesel engines on your salvage tug are protected with a high coolant temperature switch used as an alarm contact maker to warn operating personnel of the potential danger of an overheated engine. If the switch is fitted with a test button, what is this used for? The test button is used to reset the switch to clear an actual alarm condition. The test button is used to determine the actual alarm point temperature. The test button is used to test the alarm circuit whenever it is deemed necessary to do so. The test button is used every time the engine is started to test the alarm circuit prior to start- up. New Motor Plants Questions 2017
B The pneumatic propulsion control system used on your ship-docking tug uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for servicing the in-line strainers? Illustration MO-0052 The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with high pressure compressed air. The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with low pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with low pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with high pressure compressed air. New Motor Plants Questions 2017
B An oil bath type air cleaner, as the name implies, requires oil for effective air filtration. What statement is true concerning the oil bath air cleaners used to protect the auxiliary diesel engines on your OSV? The wire-mesh filter element should be dipped in oil prior to installation. Other than that, the oil bath air cleaner is kept dry. An oil bath air cleaner should have an oil level maintained so that the oil level is just below the oil drain hole of the oil reservoir. An oil bath air cleaner should have an oil level maintained so that the oil level is just at the top of the central tube. An oil bath air cleaner should be completely flooded with oil so that the wire-mesh element is kept completely submerged in oil. New Motor Plants Questions 2017
B The main engines on your supply boat are protected with a low crankcase oil level detector protective device designed to provide an alarm when the main sump oil level drops below a certain level. It is malfunctioning, and upon investigation you determine from the technical manual that the oil level detector is a sealed unit. What statement best represents the best strategy to remedy this situation? The oil level detector is adjusted just as if it was an unsealed unit, without regard to any seals associated with the unit. The oil level detector must be replaced with a new detector if it is found to be defective, since field adjustments are not possible on this type of unit. The oil level detector is adjusted just as if it was an unsealed unit, but the seals must be re- established before placing the unit back into operation. The oil level detector seals must be broken before adjustments can be made, as long as new seals are established before placing the unit back into operation. New Motor Plants Questions 2017
D The main propulsion diesel engines fitted on your river push boat are of the type shown in the illustration. What type of starting system do engines of this type usually employ? Illustrations MP-MS-04 Hydraulic cranking motor Electric cranking motor Direct air admission to the cylinders Air cranking motor New Motor Plants Questions 2017
D The oil-fired auxiliary boiler on your river push boat experiences a safety shutdown requiring a reset of the flame safeguard control to restart the boiler once the safety shutdown condition has been corrected. Which of the following conditions would best account for this? Loss of feed pump suction. High steam pressure. High water level. Loss of fuel pump suction. New Motor Plants Questions 2017
B Since towing vessels take on fresh water from shore as a source of make-up water for the closed, re-circulating cooling water systems supporting diesel engines, what property of the make-up water is most important in contributing to cooling system problems? The amount of dissolved oxygen (and other various gases). The amount of dissolved solids associated with mineral content. The degree of contamination of suspended solids, such as sand. The degree of contamination with microbiological organisms. New Motor Plants Questions 2017
B The auxiliary oil-fired water-tube steam boiler on your tug is equipped with a water column similar to that shown in the illustration. The most accurate way to determine the boiler water level is by alternately opening and reclosing the tri-cocks. At what point is the normal operating water level (NOWL) of the boiler? Illustration MO-0093 At a point coinciding with the uppermost tri-cock. At a point coinciding with the middle tri-cock. At a point coinciding with the lowermost tri-cock. The level can normally be anywhere within the water column. New Motor Plants Questions 2017
A The pneumatic propulsion control system used on your anchor-handling supply vessel uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for servicing the in-line strainers? Illustration MO-0052 The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with low pressure compressed air. The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with high pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with high pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with low pressure compressed air. New Motor Plants Questions 2017
D The manufacturer of the main propulsion diesel engines on your harbor tug specifies the requirements for fresh water makeup for the closed, re-circulating fresh water cooling system as shown in the illustration. Which of the following examples of fresh water test results would be considered acceptable by the manufacturer for coolant makeup or initial filling? Illustration MP-WC-05 {{{
Total solids: 10.6 grains/gal
pH at 20C: 4.5
Chloride ions: 1.7 grains/gal
Sulfate ions: 3.4 grains/gal}}}
{{{
Total solids: 28.7 grains/gal
pH at 20C: 6.8
Chloride ions: 2.3 grains/gal
Sulfate ions: 5.7 grains/gal}}}
{{{
Total solids: 17.2 grains/gal
pH at 20C: 7.2
Chloride ions: 4.2 grains/gal
Sulfate ions: 5.3 grains/gal}}}
{{{
Total solids: 8.4 grains/gal
pH at 20C: 7.8
Chloride ions: 1.3 grains/gal
Sulfate ions: 2.6 grains/gal}}}
New Motor Plants Questions 2017
D While on deck, you are observing the stack of an oil-fired auxiliary boiler installed on your salvage tug. The gases exiting the stack are a dense white smoke. Eliminating water vapor as a possible cause of the white smoke, what would be the correlating flame color as observed through an observation window peephole? Yellowish orange or golden yellow flame. Reddish flame. Yellow flame. Dull or dazzling white flame. New Motor Plants Questions 2017
A In a closed, re-circulating fresh water cooling system used for the main engines on your river push boat, what function would chemical treatment with molybdate primarily perform? Corrosion inhibition. Freezing point depression. Biological growth inhibition. Boiling point elevation. New Motor Plants Questions 2017
C The heating boiler on your multi-purpose supply vessel is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MP-SP-11 The boiler is of the water-tube type and utilizes natural circulation. The boiler is of the fire-tube type and utilizes natural circulation. The boiler is of the water-tube type and utilizes forced circulation. The boiler is of the fire-tube type and utilizes forced circulation. New Motor Plants Questions 2017
C When starting a towing winch drive engine in preparation for towing operations, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Cylinder jacket water pump discharge pressure. Fuel oil supply header pressure. Engine lubricating oil supply header pressure. Winch gear oil pump discharge pressure. New Motor Plants Questions 2017
D After a main diesel engine on your river push boat has experienced a safety shutdown due to excessive crankcase pressure, why is it important to wait 2 hours before opening the crankcase to investigate the cause of the trip? Opening the crankcase before 2 hours has elapsed may result in excessively rapid cooling. Opening the crankcase before 2 hours has elapsed may result in the engine spontaneously restarting. Opening the crankcase before 2 hours has elapsed may result in crankshaft rotation. Opening the crankcase before 2 hours has elapsed may result in a crankcase explosion. New Motor Plants Questions 2017
A The main propulsion diesel engines on your towing vessel are fitted with mechanically operated and controlled unit injectors. In order for the engine to run properly, the injectors must be properly timed relative to the camshaft and properly synchronized relative to the other injectors. In terms of timing and synchronization, what statement is true? Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, but injector synchronization is achieved by adjusting the control racks of the injectors to the proper setting. Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, but injector synchronization is achieved by adjusting the cam follower heights of the injectors to the proper setting. Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the cam follower heights of the injectors to the proper setting. Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the control racks of the injectors to the proper setting. New Motor Plants Questions 2017
B The offshore supply vessel to which you are assigned is gear-driven with one main propulsion diesel engine and a fixed-pitch propeller. While underway, the main engine becomes disabled, requiring your vessel to be towed back into port. If pressurized lubricating oil is not available to the reduction gear shaft bearings, what must be done during the towing operation? The reduction gear input shaft must be prevented from rotating by means of engaging the engine turning gear at the flywheel. The reduction gear output shaft must be prevented from rotating by means of locking the propeller shaft. The reduction gear input shaft must be prevented from rotating by means of engaging the propulsion clutch. The reduction gear input and output shafts must be prevented from rotating by means of blocking the gear teeth. New Motor Plants Questions 2017
A The main engines on your ocean-going tug are equipped with manual shutdown levers as shown in the illustration. What statement concerning manual shutdown is true? Illustration MP-IC-15 The manual shutdown lever is operated by means of a remote pull cable and uses the over speed trip mechanism to accomplish engine shutdown. The manual shutdown lever is operated by means of the over speed trip reset lever and uses the over speed trip mechanism to accomplish engine shutdown. The manual shutdown lever is operated by means of a remote pull cable and uses the governor fuel control linkage to accomplish engine shutdown. The manual shutdown lever is operated by means of the emergency trip reset lever and uses the governor fuel control linkage. New Motor Plants Questions 2017
A While warming up the main engines on your harbor tug while tied up at your own pier, one of the main engines suddenly sounds the low lube oil pressure alarm. What is the appropriate initial response? Immediately shutdown the engine, then investigate the cause for the low pressure alarm. Immediately add make-up oil or service lube oil coolers, strainers, and filters, as appropriate. Reduce the load and speed on the engine and continue to monitor the oil pressure. Monitor closely oil pressures, temperatures, and levels while continuing to run the engine. New Motor Plants Questions 2017
C You are analyzing the data used for trend analysis for one of the 2-stroke turbocharged main propulsion diesel engines on your ocean-going tug. Over time the scavenging air receiver (air box) pressure is steadily increasing. What condition would produce this data? The turbocharger air inlet screen is gradually becoming fouled. The engine air intake filter is gradually becoming fouled. The scavenging air ports are gradually becoming restricted with carbon. The air side of the turbocharger after cooler is gradually becoming fouled. New Motor Plants Questions 2017
D You are assigned as an engineer on an offshore oil spill response vessel using main propulsion engines of the type shown in the illustration. Assuming that the piston is properly positioned, what statement represents the procedure for inspection of the compression rings while in place inside the engine? Illustration MP-MS-04 The inspection takes place by removing the appropriate oil pan cover and viewing through the resulting opening. The inspection takes place by removing the appropriate cylinder head valve cover and viewing through the resulting opening. It is not possible to inspect the compression rings while in place inside the engine. The inspection takes place by removing the appropriate air box handhold cover and viewing through the resulting opening. New Motor Plants Questions 2017
D The fresh water cooling systems serving the main engines on your river push boat are arranged as shown in the illustration. If the fresh water thermostatic control valve fails in the position where 100% of the flow from flange "A" is permanently ported to flange "C" and flange "B" is permanently blocked, while starting and warming the engine with no load, what would be the resulting warm up time period? MP-CW-15 With no load, the engine would require a relatively normal time frame to warm up. With no load, the engine would require a much shorter than normal time frame to warm up. With no load, it is not possible to describe the time frame required to warm up the engine. With no load, the engine would require a much longer than normal time frame to warm up. New Motor Plants Questions 2017
A The main propulsion diesel engines on your platform supply vessel are protected with a high coolant temperature switch used as an alarm contact maker to warn operating personnel of the potential danger of an overheated engine. If the switch is fitted with a test button, what is this used for? The test button is used to test the alarm circuit whenever it is deemed necessary to do so. The test button is used to determine the actual alarm point temperature. The test button is used to reset the switch to clear an actual alarm condition. The test button is used every time the engine is started to test the alarm circuit prior to start- up. New Motor Plants Questions 2017
B The articulated tug-barge unit to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In terms of operating cycle and cylinder configuration, what statement is true? Illustration MP-HS-04 This is a two-stroke cycle, 45o V-type engine. This is a four-stroke cycle, 90o V-type engine. This is a four-stroke cycle, 45o V-type engine. This is a two-stroke cycle, 90o V-type engine. New Motor Plants Questions 2017
A The main engines on your offshore supply vessel are fitted with speed control governors based on the operating principle shown in the illustration. What statement is true concerning the illustrated pressure-compensated governor? Illustration MP-GV-18 With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted to vertical and the pilot valve plunger will be in the centered position blocking off the control port. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted inward and the pilot valve plunger will be in the raised position aligning the control port to the pressure port. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted to vertical and the pilot valve plunger can be positioned in any position. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted outward and the pilot valve plunger will be in the lowered position aligning the control port to the drain port. New Motor Plants Questions 2017
B The raw water boxes of the fresh water coolers serving the main propulsion diesel engines on your offshore supply vessel are fitted with sacrificial zinc anodes. Upon inspection, at what percentage of deterioration should the zinc anodes be replaced? 25 (%) 50 (%) 75 (%) 100 (%) New Motor Plants Questions 2017
D You are replacing a damaged high pressure fuel injection line for #1 cylinder on an auxiliary diesel engine onboard your towing vessel. Which of the following statements represents the best replacement practice or strategy? Custom fabricate the fuel injection line minimizing length and bends to create the shortest possible replacement fuel injection line. Custom fabricate the fuel injection line as close as possible to the fuel injection line being replaced in terms of bends and overall length. Replace the damaged fuel injection line with a custom fabricated line without regard to the length and configuration of the bends of the original. Replace the damaged fuel injection line with a factory-formed fuel injection line specifically fabricated for #1 cylinder line replacement. New Motor Plants Questions 2017
D The offshore supply vessel to which you are assigned has diesel generators fitted with fuel injectors of the type shown in figure "2" of the illustration. What statement is true concerning this type of injector? Illustration MP-FI-20 The injector is of the open type and features port and helix metering. The injector is of the closed type and features pressure-time metering. The injector is of the open type and features pressure-time metering. The injector is of the closed type and features port and helix metering. New Motor Plants Questions 2017
B The river push boat to which you are assigned has diesel generators fitted with fuel injectors with the operating principle as shown in the illustration. In figure "B" which plunger rotation position corresponds to the engine running under no load at idle RPM? Illustration MP-FI-12 1 2 3 4 New Motor Plants Questions 2017
A Evidence of low temperature corrosion is observed on the combustion space components of a slow- speed diesel engine. What causes this corrosion and what can one do to mitigate this situation? Sulfur from the fuel condensing on cold surfaces forming sulfuric acid. Ensure cooling water temperatures maintain the combustion space temperatures above the dew point of sulfuric acid. Low temperature corrosion cannot be observed; it has to be determined by metallurgical testing. Maintain cooling water temperatures as per manufacturer's specifications. Vanadium from fuel melting in the exhaust gases. Maintain lower cooling water temperature to prevent vanadium from melting. Sulfur in exhaust gas mixing with water vapor condensation. Order cylinder oil of lower total base number. New Motor Plants Questions 2017
B The harbor tug to which you are assigned has main propulsion engines of the type shown in the illustration. In terms of operating cycle, scavenging flow pattern, and piston type, what statement is true concerning this engine type? Illustration MP-MS-04 This is a two-stroke cycle, loop-scavenged, trunk type piston engine. This is a two-stroke cycle, uniflow-scavenged, trunk type piston engine. This is a two-stroke cycle, uniflow-scavenged, crosshead type piston engine. This is a four-stroke cycle, uniflow-scavenged, trunk type piston engine. New Motor Plants Questions 2017
B The platform supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What statement is true concerning transfer of control? Illustration MP-IC-12 The transfer valve at the pneumatic remote control station is used to transfer control of propulsion from the pneumatic remote control station to the mechanical slave remote control station or vice versa. The transfer valve at the engine room control station is used to transfer control of propulsion from the engine room control station to the pilot house pneumatic master control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the mechanical slave remote control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the engine room control station or vice versa. New Motor Plants Questions 2017
A The diesel engines on your anchor-handling supply vessel are all protected with dry-type air filters. When changing filter elements what visual indication would cause you to suspect that the engine has been contaminated with dust as the result of improperly sealing of the filter element gasket? The "clean" side of the air filter element is streaked with dust. The "dirty" side of the air filter element is coated with dust. The "clean" side of the air filter element is clean and free of dust. The "dirty" side of the air filter housing is coated with dust. New Motor Plants Questions 2017
A The lubricating oil system supporting the main propulsion reduction gear on the salvage tug to which you are assigned is fitted with a sea water cooled 4-pass shell and tube lube oil cooler. The water box sacrificial zinc anodes must be inspected periodically. Which of the following listed actions correctly states maintenance criteria pertaining to scale build-up on the zincs? Any accumulated scale build-up on sacrificial zinc anodes should be scraped off until the zinc anodes are shiny. Any sacrificial zinc anodes with accumulated scale build-up should be replaced regardless of the degree of deterioration. Any accumulated scale build-up on sacrificial zinc anodes should be left intact to ensure proper protection from galvanic corrosion. There is no need to check for scale build-up on the sacrificial zinc anodes as this phenomenon is not physically possible. New Motor Plants Questions 2017
A The main propulsion diesel engines fitted on your multi-purpose offshore supply vessel are started with compressed air using the system illustrated. What is the starting method used with this system? Illustration MP-SR-07 Air cranking motor(s). Hydraulic cranking motor(s) with air over hydraulics. Direct air admission with air start distributor. Direct air admission with cam actuated air start valves. New Motor Plants Questions 2017
A For corrosion to take place within the closed, re-circulating cooling water system of a marine diesel engine, an electro-chemical cell must exist where the cooling water is electrically conductive. Which of the following factors has the greatest influence on electrical conductivity? The amount of dissolved solids in the water. The temperature of the water. The pH of the water. The amount of dissolved oxygen in the water. New Motor Plants Questions 2017
C Great care should be taken to prevent a day tank from being pumped empty while a diesel engine is in operation. If this does happen on your OSV, the engine fuel and fuel injection system must be reprimed. What is accomplished during repriming? The system is being flushed with fuel to remove entrained moisture. The system is being treated with a starting aid such as diethyl ether. The system is being purged with fuel to remove entrained air. The system is being flushed with fuel to remove solid impurities. New Motor Plants Questions 2017
D A diesel engine driven winch on your offshore supply vessel is fitted with a reversing reduction gear equipped with dry-type friction clutches. Which of the operational conditions listed below is most likely to result in clutch slippage and associated clutch disc wear? Habitually engaging the clutch at engine idle speed. Habitually disengaging the clutch at engine idle speed. Habitually disengaging the clutch at high engine speed. Habitually engaging the clutch at high engine speed. New Motor Plants Questions 2017
D When servicing dry-type air filters as used on the towing vessel to which you are assigned, which of the following criteria would be the most accurate for determining the need for servicing? Estimation of severity of dust conditions at the air intake Determination of operating hours since last servicing Determination of engine room fresh air exchange rate Determination of restriction with suitable gauge New Motor Plants Questions 2017
D The auxiliary oil-fired water-tube steam boiler on your sea-going tug is equipped with a water column similar to that shown in the illustration. If the gauge glass becomes disabled or there is uncertainty associated with the gauge glass reading, the tri-cocks can be used to determine the boiler water level. What statement best describes the challenge associated with trying to differentiate between steam and water? Illustration MO-0093 On a tri-cock situated below the water level, when opened all of the escaping water will flash to steam. On a tri-cock situated above the water level, when opened all of the escaping steam will condense to water. On a tri-cock situated above the water level, when opened some of the escaping steam will condense to water. On a tri-cock situated below the water level, when opened some of the escaping water will flash to steam. New Motor Plants Questions 2017
C The main engines on your oil platform supply vessel are fitted with speed control governors of the type shown in the illustration. If the shutdown solenoid is de-energized during normal operation, which of the following scenarios depicts the response on a safety shutdown where the shutdown plunger rod moves downward unseating the ball check valve when the shutdown solenoid energizes? Illustration MP-IC-14 The servo piston rod moves upward. The power cylinder tail rod moves upward. The servo piston rod moves downward. The power cylinder tail rod moves upward. The servo piston rod moves upward. The power cylinder tail rod moves downward. The servo piston rod moves downward. The power cylinder tail rod moves downward. New Motor Plants Questions 2017
C If the speeder spring of a diesel engine governor breaks while operating at full load, the engine RPM will __________. hunt until stabilized by the droop rod increase until the overspeed trip is actuated decrease to a slightly lower value remain the same until manually changed New Motor Plants Questions 2017
A When starting a main propulsion diesel engine fitted with attached pumps in preparation for getting underway on your towboat, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Lubricating oil supply header pressure. Cylinder jacket water pump discharge pressure. Sea water pump discharge pressure. Fuel oil supply header pressure. New Motor Plants Questions 2017
D The two-stroke cycle main propulsion engines on the platform supply vessel to which you are assigned are fitted with turbochargers for scavenging purposes. Assume that you are checking the air box drains in an installation that is valved with external drain piping to a drains tank. When you open the air box drain valves, no drainage occurs when in fact there is an accumulation of oil and moisture on the floor of the air boxes. What should you do? Blow through the drain openings with compressed air to clear the drains. Increase the air box pressure to blow the air box drain openings clear. Increase the crankcase pressure to blow the air box drain openings clear. Mechanically poke through the drain openings with a rod to clear the drains. New Motor Plants Questions 2017
D While taking a round in the engine room of your harbor tug, when is the best time to check the cylinder jacket water expansion tank level on a heat exchanger-cooled diesel generator with a pressurized cooling system where no sight glass or float indicator is provided? It is best to check the level by removing the pressure cap when the engine is running with no load for several minutes. It is best to check the level by removing the pressure cap immediately after the engine has been shut down. It is best to check the level by removing the pressure cap when the engine is running under load and at operating temperature. It is best to check the level by removing the pressure cap after the engine has been shut down and has had a chance to cool down. New Motor Plants Questions 2017
D The generator drive diesel engines on your supply boat are fitted with a multi-plunger injection pump with high pressure fuel lines leading to each hydraulically operated injector. If the engine is allowed to run out of fuel, it may become necessary to purge the high pressure fuel lines of air. How is this accomplished? Slackening each high pressure fuel line fitting at the fuel injector while cranking over the engine with the starter and allowing air to escape, then retightening when air bubbly fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while stroking the manually operated priming pump and allowing air to escape, then retightening when bubbly fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while stroking the manually operated priming pump and allowing air to escape, then retightening when a solid stream of fuel is observed. Slackening each high pressure fuel line fitting at the fuel injector while cranking over the engine with the starter and allowing air to escape, then retightening when a solid stream of fuel is observed. New Motor Plants Questions 2017
C The main engine thrust bearing shown in the illustration contains how many thrust shoes? Illustration MO-0121 6 10 12 20 New Motor Plants Questions 2017
D The fresh water cooling systems serving the main engines of the platform supply vessel to which you are assigned are arranged as shown in the illustration. What statement best describes the arrangement of the fresh water keel cooler shown in the system diagram? Illustration MP-CW-16 The keel cooler is mounted on the outside of the hull above the water line. The keel cooler is mounted on the inside of the hull above the water line. The keel cooler is mounted on the inside of the hull below the water line. The keel cooler is mounted on the outside of the hull below the water line. New Motor Plants Questions 2017
B You are replacing an automotive type cooling water thermostat on one of the diesel generator sets on your ship docking tug. The markings on the original thermostat indicate that it was set to begin opening at 180F. Which of the following thermostats marked for Celsius would be a replacement that comes closest to the value at which opening begins as compared to the original thermostat? 70C 80C 90C 100C New Motor Plants Questions 2017
B The various auxiliary diesel engines fitted on your ship-docking tug may employ a variety of different starting systems. What is the source of potential energy used to produce torque for the illustrated cranking motor? Illustration MP-SR-06 Compressed air receiver Electric storage battery Diesel fuel day tank Hydraulic accumulator New Motor Plants Questions 2017
B When cleaning burner atomizers associated with an oil-fired auxiliary boiler fitted on your offshore supply boat, which of the following metals would be recommended to use in fabricating a tool for the purposes of carbon removal? Cromoly steel Copper Tungsten Titanium New Motor Plants Questions 2017
A The fresh water cooling systems serving the main engines on your offshore supply vessel are arranged as shown in the illustration. If there is excessive scale build up inside the tubes of an engine's shell and tube RW/FW heat exchanger, while the engine is in operation, what would be the resulting symptoms? MP-CW-15 A decreased temperature rise on the raw water side, and a decreased temperature drop on the fresh water side. A increased temperature rise on the raw water side, and a decreased temperature drop on the fresh water side. A decreased temperature rise on the raw water side, and a increased temperature drop on the fresh water side. A increased temperature rise on the raw water side, and a increased temperature drop on the fresh water side. New Motor Plants Questions 2017
D The articulated tug-barge unit to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What must be the position of the two transfer valves within the system when the mechanical slave remote control station is being used to control propulsion? Illustration MP-IC-12 The transfer valve at the engine room control station must be in the engine room position and the transfer valve at the pilot house pneumatic master control station must be in the pilot house position. The transfer valve at the engine room control station must be in the pilot house position and the transfer valve at the pilot house pneumatic master control station must be in the pneumatic remote control position. The transfer valve at the engine room control station must be in the engine room position and the transfer valve at the pilot house pneumatic master control station must be in the pneumatic remote control position. The transfer valve at the engine room control station must be in the pilot house position and the transfer valve at the pilot house pneumatic master control station must be in the pilot house position. New Motor Plants Questions 2017
B What maintenance practice represents the best protection against moisture carryover to the fuel injection system of the main engines on board your general purpose supply vessel? Frequently replacing fuel injection pump and injector nozzle inlet fuel filters. Periodically opening, then reclosing, the drain valve on coalescing type diesel oil filters. Closing the diesel oil day tank vents, particularly when the relative humidity is high. Periodically opening, then reclosing, the vent valve on coalescing type diesel oil filters. New Motor Plants Questions 2017
B The main propulsion diesel engines fitted on your salvage tug are equipped with engine crankcase oil level dipsticks marked on both sides of the dipstick. What is the significance of the markings? The add and full marks on both sides correspond to one another and are identically placed. Either side can be used accurately no matter what is the running status of the engine and what is the temperature of the oil. The add and full marks on one side correspond to the side to be used when the engine is STOPPED and the engine oil is COLD. On the other side, the marks correspond to side to be used when the engine is running at IDLE RPM and the engine oil is HOT. The add and full marks on one side correspond to the side to be used when the engine is STOPPED and the engine oil is HOT. On the other side, the marks correspond to side to be used when the engine is running at IDLE RPM and the engine oil is COLD. The add and full marks on one side correspond to the side to be used when the engine is running at IDLE RPM and the engine oil is COLD. On the other side, the marks correspond to side to be used when the engine is running at MAXIMUM RPM and the engine oil is HOT. New Motor Plants Questions 2017
B You are assigned to a platform supply vessel fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 900 rpm, what will be the rotational speed of the two camshafts? Illustration MP-MS-04 450 rpm 900 rpm 1800 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2017
D The fresh water cooling systems serving the main engines on your salvage tug are arranged as shown in the illustration. What statement best describes the functioning of the fresh water thermostatic control valve shown in the system diagram? MP-CW-16 The fresh water thermostatic control valve controls the engine fresh water outlet temperature and is set up as a 3-way mixing valve. The fresh water thermostatic control valve controls the engine fresh water inlet temperature and is set up as a 3-way mixing valve. The fresh water thermostatic control valve controls the engine fresh water inlet temperature and is set up as a 3-way diverting valve. The fresh water thermostatic control valve controls the engine fresh water outlet temperature and is set up as a 3-way diverting valve. New Motor Plants Questions 2017
C For the typical marine turbocharged main propulsion diesel engine, where is the usual location for the air intake filter and silencer? The air intake filter/silencer usually is local to the engine and surrounds the circumference of the turbocharger turbine inlet. The air intake filter/silencer usually is remote from the engine and is mounted in a protected area above the weather deck. The air intake filter/silencer usually is local to the engine and surrounds the circumference of the turbocharger blower/compressor inlet. The air intake filter/silencer usually is remote from the engine, but still in the engine room mounted on a convenient bulkhead. New Motor Plants Questions 2017
B Wire brushing and scraping can be used to remove hard carbon deposits from exhaust system surfaces. When cleaning exhaust systems associated with the diesel engines on the tug to which you are assigned, what technique can effectively be used in conjunction with mechanical cleaning to loosen and soften up these hard carbon deposits? Sand blasting with diamond dust Treating with carbon penetrating solvent Baking off carbon with heat lamps Treating with carbon tetrachloride solvent New Motor Plants Questions 2018
B You are inspecting the blower of a Roots-blown, two-stroke cycle main propulsion engine on the ocean-going tug to which you are assigned and discover the presence of aluminum dust on the rotors and on the air duct surfaces. What would most likely be the direct cause of this? Restricted scavenging air intake ports. Worn blower rotor shaft bearings. Restricted blower air intake filter. Worn blower rotor shaft seals. New Motor Plants Questions 2018
D Wire brushing and scraping can be used to remove hard carbon deposits from exhaust system surfaces. When cleaning exhaust systems associated with the diesel engines on the fishing trawler to which you are assigned, what technique can effectively be used in conjunction with mechanical cleaning to loosen and soften up these hard carbon deposits? Baking off carbon with heat lamps. Sand blasting with diamond dust. Treating with carbon tetrachloride solvent. Treating with carbon penetrating solvent. New Motor Plants Questions 2018
B The letters "NPT" used in the notation 1/8-27 NPT as shown in the illustration, indicates the __________. Illustration GS-0010 class of finish thread series class of fit thread profile New Motor Plants Questions 2018
C The main diesel engines on your coast-wise tug are protected with an array of devices designed to provide an alarm or possible shutdown for various unsafe conditions. During the maintenance procedure for adjusting the alarm and/or trip point setting for such a device, which of the following devices would have a time delay associated with it? Engine crankcase high pressure trip/alarm device. Engine over speed trip/alarm device. Engine low lube oil pressure trip/alarm device. Engine coolant high temperature alarm device. New Motor Plants Questions 2018
C When interpreting the engine lube oil supply header pressures for the main engines on your river push boat, what statement is true assuming that the lube oil pump is engine-driven? As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to decrease. As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to increase. As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to increase. As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to decrease. New Motor Plants Questions 2018
D You are analyzing the data used for trend analysis for one of the main propulsion diesel engines on the ship-docking tug to which you are assigned. The cylinder exhaust temperature of one of the cylinders is significantly lower than the others. When analyzing compression and firing pressure data, however, the numbers are within the normal range for this particular cylinder. What condition would produce these results? Excessive carbon build-up on air inlet ports or valves of affected cylinder. Leaking fuel injector needle valve for affected cylinder. Leaking exhaust valve on affected cylinder. Excessive carbon build-up on exhaust pyrometer probe of affected cylinder. New Motor Plants Questions 2018
C In a closed, re-circulating fresh water cooling system used for the main engines on your sea-going salvage tug, what function would chemical treatment with nitrites primarily perform? Freezing point depression. Boiling point elevation. Corrosion inhibition. Biological growth inhibition. New Motor Plants Questions 2018
A The diesel engines on your towing vessel are all protected with dry-type air filters. The air filters should be inspected and replaced in accordance with manufacturer instructions. What is the generally accepted criteria that would dictate when filter replacement becomes necessary? The air filter element should be replaced when the pressure drop across the element increases above the specified maximum. The air filter element should be replaced when the pressure rise across the element decreases below the specified minimum. The air filter element should be replaced when the pressure drop across the element decreases below the specified minimum. The air filter element should be replaced when the pressure rise across the element increases above the specified maximum. New Motor Plants Questions 2018
A When rolling over a main engine on your river push boat prior to starting with the cylinder test valves open to expel any fluids accumulated within the cylinders, a rather large amount of water is discharged. What is the appropriate response? Do not allow the engine to be started until the cause of the water discharge has been determined and corrected. Start the engine, but monitor all fluid levels very closely, especially that of the jacket water. Start the engine, but run the engine with the cylinder test valves cracked slightly open. Start the engine, but maintain the jacket water expansion tank level higher than normal. New Motor Plants Questions 2018
C The harbor tug to which you are assigned is fitted with 4-stroke cycle, 6-cylinder in-line diesel generator sets. Using the chart shown in the illustration, what is the firing order of the engines? Illustration MP-HS-05 1-2-3-4-5-6 1-4-2-6-3-5 1-5-3-6-2-4 Not enough information is provided to determine the firing order. New Motor Plants Questions 2018
C The main propulsion main engines on the ship-docking tug to which you are assigned are fitted with turbochargers as shown in the illustration. What statement is true concerning the over-running clutch and gear-drive train as fitted to this turbocharger type? Illustration MP-CA-08 The turbocharger is gear-driven under all engine load and starting conditions, and as such is considered both exhaust gas and mechanically driven. The turbocharger is free-wheeling and exhaust gas driven under all engine load and starting conditions, and mechanical drive arrangements are for emergency use only. The turbocharger is gear-driven from the engine under low load and starting conditions only. Under high load conditions, the turbocharger is free-wheeling and exhaust gas driven. The turbocharger is gear-driven from the engine under high load conditions only. Under low load and starting conditions, the turbocharger is free-wheeling and exhaust gas driven. New Motor Plants Questions 2018
B The main propulsion engines onboard your harbor tug use a lubricating oil system as shown in the illustration. What item number represents the scavenging lube oil pump? Illustration MP-LO-07 2 4 9 12 New Motor Plants Questions 2018
A You are on a ship-docking tug using main propulsion engines of the type shown in the illustration. Assuming that the piston is properly positioned, what statement represents the procedure for inspection of the compression rings while in place inside the engine? Illustration MP-MS-07 It is not possible to inspect the compression rings while in place inside the engine. The inspection takes place by removing the appropriate side cover and viewing through the resulting opening. The inspection takes place by removing the appropriate crankcase access door and viewing through the resulting opening. The inspection takes place by removing the appropriate cylinder head valve cover and viewing through the resulting opening. New Motor Plants Questions 2018
C Exhaust system back pressure is customarily measured at the discharge of a turbocharger. If the exhaust system back pressure is higher than normal for a given engine load on your salvage tug at the point of measurement, which of the following conditions would most likely account for this? Restricted turbocharger turbine inlet screen. Restricted turbocharger air intake filter. Restricted exhaust silencer/muffler. Restricted exhaust ports or valves. New Motor Plants Questions 2018
A Prior to starting a main propulsion diesel engine fitted on your salvage tug, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil? When the oil level rises to the FULL mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to the between the ADD and FULL marks on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to the ADD mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to a level well above the FULL mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. New Motor Plants Questions 2018
B The engine manufacturer for the main engines used on your harbor tug specifies a supplemental coolant additive consisting of molybdate and nitrite be used to supplement the heavy-duty antifreeze for the closed, re-circulating fresh water cooling system. A test-strip comparison chart as shown in the illustration is used for coolant testing purposes. If the molybdate concentration color corresponds to row 2 and the nitrite concentration color corresponds to column B, what statement is true? Illustration MP-WC-12 The molybdate and nitrite concentrations levels are too high, and a portion of the coolant must be drained and replaced with fresh water. The molybdate and nitrite concentrations levels are too low, and additional supplementary coolant additive is required. The molybdate and nitrite concentrations levels are within acceptable limits, and no further correction is required. It is not possible to determine the molybdate and nitrite concentration levels from the information given. New Motor Plants Questions 2018
C The river pushboat to which you are assigned is fitted with main propulsion reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear? Illustration MP-DS-16 This type of reduction gear is used with a controllable pitch propeller and a non-reversing engine. This type of reduction gear is used with a controllable pitch propeller and a reversing engine. This type of reduction gear is used with a fixed pitch propeller and a non-reversing engine. This type of reduction gear is used with a fixed pitch propeller and a reversing engine. New Motor Plants Questions 2018
D The generator drive engines fitted on your articulated tug-barge unit are started by the type of starter shown in figure "B" of the illustration. What is the purpose of the gear train situated between the air turbine rotor shaft and the pinion shaft? Illustration MP-SR-09 It DECREASES the speed of the pinion shaft as compared to the air turbine rotor shaft for the purposes of DECREASING starter motor torque. It INCREASES the speed of the pinion shaft as compared to the air turbine rotor shaft for the purposes of INCREASING starter motor torque. It INCREASES the speed of the pinion shaft as compared to the air turbine rotor shaft for the purposes of DECREASING starter motor torque. It DECREASES the speed of the pinion shaft as compared to the air turbine rotor shaft for the purposes of INCREASING starter motor torque. New Motor Plants Questions 2018
B The ship-docking tug to which you are assigned has a fire pump drive engine as shown in the illustration. What statement concerning common air inlet and exhaust outlet pressures is true, if the engine is running at rated speed? Illustration MP-IX-11 There is no predictable, consistent relationship between the common exhaust outlet and air inlet pressures. The common exhaust outlet pressure will be lower than the common air inlet pressure. The common exhaust outlet pressure will be equal to the common air inlet pressure. The common exhaust outlet pressure will be higher than the common air inlet pressure. New Motor Plants Questions 2018
C You have just replaced a mechanically operated unit injector on a two-stroke cycle auxiliary diesel engine's #1 cylinder on your river push boat. You are using an injector timing tool to set the injector follower height. To do this you must ensure that the fuel cam follower is riding on the fuel cam base circle. Which of the following statements represents the best assurance that the crankshaft is properly positioned? The crankshaft should be barred in the direction of rotation until the #1 cylinder's intake valves are fully opened. The crankshaft should be barred in the direction of rotation until the #1 cylinder's intake valves are fully closed. The crankshaft should be barred in the direction of rotation until the #1 cylinder's exhaust valves are fully opened. The crankshaft should be barred in the direction of rotation until the #1 cylinder's exhaust valves are fully closed. New Motor Plants Questions 2018
C The deck winch drive engine onboard your salvage tug uses a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-06 Sump filtration Shunt filtration Bypass filtration Full-flow filtration New Motor Plants Questions 2018
A The tractor tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. What statement best describes the configuration of the multiple turbochargers? Illustration MP-IX-08 Two (2) turbochargers are used, one for each cylinder bank, to reduce exhaust back pressure. Four (4) turbochargers are used and configured in series for a four-staging effect to boost charge air pressure. Two (2) turbochargers are used and configured in series for a two-staging effect to boost charge air pressure. Four (4) turbochargers are used, two for each cylinder bank, to reduce exhaust back pressure. New Motor Plants Questions 2018
B You are assigned to a river push boat fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. In consideration of the direction of rotation, what combustion cycle event occurs from point "A" to point "D"? Illustration MO-0084 Compression Intake Exhaust Power New Motor Plants Questions 2018
B The fresh water cooling systems serving the main engines of the towing vessel to which you are assigned are arranged as shown in the illustration. What statement best describes the arrangement of the fresh water keel cooler shown in the system diagram? Illustration MP-CW-16 The keel cooler is mounted on the outside of the hull above the water line. The keel cooler is mounted on the outside of the hull below the water line. The keel cooler is mounted on the inside of the hull below the water line. The keel cooler is mounted on the inside of the hull above the water line. New Motor Plants Questions 2018
C The generator drive engines fitted on your harbor tug are started by the type of starter shown in figure "A" of the illustration. What type of starter is shown? Illustration MP-SR-09 Radial piston hydraulic motor Turbine type air motor Axial piston hydraulic motor Sliding vane air motor New Motor Plants Questions 2018
C The tractor tug to which you are assigned is fitted with main propulsion diesel engines of the type shown in the illustration. In terms of valve operating gear, cylinder liner type, and connecting rod type, what statement is true? Illustration MP-MS-12 This is a pushrod operated overhead valve engine, with jacketed cylinder liners and conventional connecting rods. This is a pushrod operated overhead valve engine, with wet cylinder liners and hinged-strap, fork-and-blade connecting rods. This is an overhead cam engine, with jacketed cylinder liners and hinged-strap, fork-and- blade connecting rods. This is an overhead cam engine, with wet cylinder liners, and marine-type connecting rods. New Motor Plants Questions 2018
D The two-stroke cycle main propulsion engines on the harbor tug to which you are assigned are fitted with turbochargers for scavenging purposes. Assume that you are checking the air box drains in an installation that is valved with external drain piping to a drains tank. When you open the air box drain valves, no drainage occurs when in fact there is an accumulation of oil and moisture on the floor of the air boxes. What should you do? Blow through the drain openings with compressed air to clear the drains. Increase the crankcase pressure to blow the air box drain openings clear. Increase the air box pressure to blow the air box drain openings clear. Mechanically poke through the drain openings with a rod to clear the drains. New Motor Plants Questions 2018
D The pneumatic propulsion control system used on your towing vessel is configured as shown in the illustration. In terms of clutch air system maintenance, what statement best represents operational requirements? Illustration MP-IC-12 Whereas the cleanliness of clutch air is critical, the dryness and pressure are clutch air are of secondary concern. Whereas the dryness of clutch air is critical, the pressure and cleanliness of the clutch air are of secondary concern. Whereas the clutch air pressure is critical, the dryness and cleanliness of the clutch air are of secondary concern. The pressure, dryness, and cleanliness of clutch air are all critical to successful pneumatic propulsion control operations. New Motor Plants Questions 2018
C The river push boat to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in the illustration. What does the component labeled "2" represent? Illustration MP-IX-06 Exhaust manifold Wet muffler Charge air manifold Charge air cooler New Motor Plants Questions 2018
D The towing vessel to which you are assigned is fitted with a pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The local/remote transfer valve at the engine room control station has a blocked local port. The pilot house/remote transfer valve at the pilot house has a blocked remote port. The attendance valve at the pneumatic remote control station has a blocked outlet port. The local/remote transfer valve at the engine room control station has a blocked remote port. New Motor Plants Questions 2018
D The ocean-going tug to which you are assigned is fitted with auxiliary engines as partly shown in the illustration. What statement is true concerning the valve guide and valve seat arrangements? Illustration MP-HS-03 The valve guides are replaceable inserts, and the valve seats are integral (non-replaceable). The valve guides are integral (non-replaceable), and the valve seats are replaceable inserts. The valve guides and the valve seats are both integral (non-replaceable). The valve guides and the valve seats are both replaceable inserts. New Motor Plants Questions 2018
C The ship-docking tug to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If the astern clutch fails to engage from the engine room control station, but engages properly from all remote control stations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The local/remote transfer valve at the engine room control station has a blocked local port. The astern clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. The control lever at the engine room control station has a blocked astern clutch engagement pilot port. The clutch actuator 4-way control valve at the clutch control panel has a restricted astern clutch quick exhaust port opening. New Motor Plants Questions 2018
C Suppose the diesel generator set drive engines are of the type shown in the illustration on your ship docking tug. What description best represents the operating cycle and aspiration method? Illustration MP-HS-07 Crankcase scavenged, two-stroke cycle engine. Naturally aspirated, two-stroke cycle engine Roots-blown, two-stroke cycle engine. Roots-blown, four-stroke cycle engine. New Motor Plants Questions 2018
D Suppose the main propulsion diesel engines on your river pushboat are fitted with pressure-compensated governors as shown in the illustration. What function does the engine lube oil pressure connection provide? Illustration MP-GV-03 It is used as a governor lubricant and as a hydraulic power medium for the power cylinder. It is used solely for the purpose of achieving engine shutdown on low engine lube oil pressure. It is used solely for the purpose of activating an alarm on low engine lube oil pressure. It is used for both activating an alarm and achieving engine shutdown on low engine lube oil pressure. New Motor Plants Questions 2018
B Suppose one of the overhead camshafts on the V-type main propulsion diesel engines on your tug are fitted on the forward end with the device shown in the illustration. In addition to serving as a counterweight, what other function does the device serve? Illustration MP-SF-06 Torsional vibration damper Overspeed trip Overload sensor Harmonic balancer New Motor Plants Questions 2018
B Which tugboat diesel fuel oil day tank condition would be most likely to result in water contaminated fuel? Maintaining relatively low day tank levels when the relative humidity of the atmosphere is low. Maintaining relatively low day tank levels when the relative humidity of the atmosphere is high. Maintaining relatively high day tank levels when the relative humidity of the atmosphere is high. Maintaining relatively high day tank levels when the relative humidity of the atmosphere is low. New Motor Plants Questions 2018
A The main engines on your harbor tug are equipped with over speed trip devices as shown in the illustration. By what method is the engine shutdown on an over speed condition? Illustration MP-IC- 15 A trip shaft cam positions all the unit injectors plungers to the bottom of their respective strokes, preventing plunger reciprocation, which results in engine shutdown. A solenoid valve in the common fuel supply line to the unit injectors is closed, which results in engine shutdown. A trip shaft cam positions all the unit injectors plungers to the top of their respective strokes, preventing plunger reciprocation, which results in engine shutdown. The fuel control linkage controlling the unit injector racks goes to the no fuel position, which results in engine shutdown. New Motor Plants Questions 2018
A For diesel engines, such as those used for main propulsion and auxiliary power on river push boats, while running at speed, how is the ignition of fuel within the cylinder achieved? Ignition is achieved by the heat of compression created by compressing intake/charge air within the cylinder into a relatively small volume. Ignition is achieved by intense heat by passing electric current through the element of a specially designed glow plug. Ignition is achieved by the heat of compression created by compressing the air/fuel mixture within the cylinder into a relatively small volume. Ignition is achieved by a high voltage electric spark induced across the gap of a specially designed spark plug. New Motor Plants Questions 2018
B Suppose the diesel generator set drive engines are of the type shown in the illustration on your towing vessel. Assuming the engine is naturally aspirated, within an individual cylinder in terms of piston stroke and position, under what circumstances are the intake and exhaust valves both open? Illustration MP-HS-03 When the piston is at bottom dead center (BDC) transitioning from the intake stroke to the compression stroke. When the piston is at top dead center (TDC) transitioning from the exhaust stroke to the intake stroke. When the piston is at bottom dead center (BDC) transitioning from the power stroke to the exhaust stroke. When the piston is at top dead center (TDC) transitioning from the compression stroke to the power stroke. New Motor Plants Questions 2018
C The river push boat to which you are assigned has a main propulsion engine of the type shown in the illustration. In terms of piston action, operating cycle, and piston type, what statement is true concerning this engine type? Illustration MP-MS-03 This is a single-acting, two-stroke cycle, crosshead piston type engine. This is a double-acting, four-stroke cycle, opposed piston type engine. This is a single-acting, two-stroke cycle, opposed piston type engine. This is a double-acting, two-stroke cycle, crosshead piston type engine. New Motor Plants Questions 2018
B When checking the crankcase oil level on a main propulsion engine on your ship-docking tug while en-route to picking up the ship, what should be the oil level as indicated on the dipstick? The level should be below the ADD mark on the side of the dipstick marked with engine IDLE and oil HOT. The level should be between the FULL and ADD marks on the side of the dipstick marked with engine IDLE and oil HOT. The actual level is unimportant as long as it is visible on the dipstick when the engine is running. The level should be well above the FULL mark on the side of the dipstick marked with engine IDLE and oil HOT. New Motor Plants Questions 2018
C The river push boat to which you are assigned is fitted with generator engines as partly shown in the illustration. What statement is true concerning the cylinders? Illustration MP-HS-03 The cylinder liners are of the jacketed type and are replaceable inserts. The cylinder liners are of the dry type and are replaceable inserts. The cylinder liners are of the wet type and are replaceable inserts. The cylinder walls are integral (non-replaceable) to the cylinder block. New Motor Plants Questions 2018
A When checking the crankcase oil level on an off-line diesel generator set engine on your ship- docking tug, what should be the oil level as indicated on the dipstick? The level should be between the FULL and ADD marks on the dipstick. The actual level is unimportant as long as it is visible on the dipstick. The level should be below the ADD mark on the dipstick. The level should be well above the FULL mark on the dipstick. New Motor Plants Questions 2018
A The various auxiliary diesel engines fitted on your harbor tug may employ a variety of different cranking methods for engine starting. What type of cranking motor is shown in the illustration? Illustration MP-SR-04 Air cranking motor Electric cranking motor Gasoline engine cranking motor Hydraulic cranking motor New Motor Plants Questions 2018
B The main propulsion engines onboard your tractor tug use a lubricating oil system as shown in the illustration. What item number represents the lubricating oil filter? Illustration MP-LO-07 2 5 10 12 New Motor Plants Questions 2018
A Which of the following fuel systems is characterized by a complete absence of high-pressure fuel lines? Unit injector type system. Rotary plunger type system. Common rail type system. In-line multi-plunger type system. New Motor Plants Questions 2018
D The harbor tug to which you are assigned has a diesel engine fitted with a rotary plunger distributor type pump. Which figure of the illustration represents the most likely type of fuel injection equipment used? Illustration MP-FI-19 1 2 3 4 New Motor Plants Questions 2018
A The harbor tug to which you are assigned has main engines fitted with open type combustion chambers featuring direct injection. Of the listed figures below found in the illustration, which figure represents the most likely type of injector nozzle type? Illustration MP-FI-18 1 2 3 4 New Motor Plants Questions 2018
B The river push boat to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in the illustration. What does the component labeled "2" represent? Illustration MP-IX-06 Wet muffler Charge air manifold Charge air cooler Exhaust manifold New Motor Plants Questions 2018
C The sea-going tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. What statement is true concerning the turbocharger charge air discharge arrangements? Illustration MP-IX-08 It is not possible to determine the turbocharger charge air discharge arrangements in this particular drawing. The left side turbocharger discharges charge air to the left cylinder bank, and the right side turbocharger discharges charge air to the right cylinder bank. The left side turbocharger discharges charge air to the right cylinder bank, and the right side turbocharger discharges charge air to the left cylinder bank. The left side turbocharger discharges charge air to both cylinder banks, and the right side turbocharger discharges charge air to both cylinder banks. New Motor Plants Questions 2018
D The fresh water cooling systems serving the main engines of your towing vessel are of the type shown in the illustration. What statement accurately describes the characteristics of the fresh water cooling circuit? Illustration MP-CW-15 The fresh water circuit is a vented system using an automotive type 2-way thermostatic control valve for temperature control. The fresh water circuit is a pressurized system using an automotive type 2-way thermostatic control valve for temperature control. The fresh water circuit is a pressurized system using a stationary/marine type 3-way thermostatic control valve for temperature control. The fresh water circuit is a vented system using a stationary/marine type 3-way thermostatic control valve for temperature control. New Motor Plants Questions 2018
D The auxiliary engines on the ocean-going tug to which you are assigned are fitted with Roots- blowers as shown in the illustration. What statement is true concerning the timing gears as shown in figure "A"? Illustration MP-CA-12 The timing gears are straight cut and insure that the blower rotor lobes are properly spaced apart with a close tolerance. The timing gears are straight cut and insure that the blower is properly timed to the engine's crankshaft. The timing gears are helically cut and insure that the blower is properly timed to the engine's crankshaft. The timing gears are helically cut and insure that the blower rotor lobes are properly spaced apart with a close tolerance. New Motor Plants Questions 2018
C The main engines on your river towboat are fitted with speed control governors of the type shown in the illustration. What technology is used to transmit the desired speed setting from the navigational bridge to the final input signal to the engine governor? Illustration MP-GV-03 Mechanical (cable or chain). Electronic (variable DC current). Pneumatic (variable control air pressure). Hydraulic (variable control oil pressure). New Motor Plants Questions 2018
B Suppose each of the main propulsion engines on your harbor assist tug is equipped with a variable speed governor equipped with a solenoid actuated shutdown device. After a high temperature alarm, after continuing to rise, what is the most likely engine high temperature condition that would initiate a safety trip shutdown? High fuel temperature High jacket water temperature High charge air temperature High exhaust temperature New Motor Plants Questions 2018
A The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MP-SP-11 The boiler is of the water-tube type and utilizes forced circulation. The boiler is of the fire-tube type and utilizes natural circulation. The boiler is of the fire-tube type and utilizes forced circulation. The boiler is of the water-tube type and utilizes natural circulation. New Motor Plants Questions 2018
D If the water level as indicated by the gauge glass of an auxiliary boiler is in question, it should be blown down. Which of the following statements represents the proper procedure for performing a gauge glass blow down? The gauge glass should be blown down twice; first with the upper cut-out valve open and then with the lower cut-out valve open. The gauge glass should be blown down once with both the upper cut-out and lower cut-out valves open simultaneously. The gauge glass should be blown down once with the lower cut-out valve open. The gauge glass should be blown down twice; first with the lower cut-out valve open and then with the upper cut-out valve open. New Motor Plants Questions 2018
C According to the illustrated diesel engine cooling water systems diagram, what fluid is the high temperature central fresh water thermostat designed to maintain? Illustration MO-0129 The jacket water cooler inlet temperature. The main engine jacket water inlet temperature. The main engine jacket water outlet temperature. The jacket water cooler outlet temperature. New Motor Plants Questions 2018
C The vessel to which you are assigned has main diesel engines fitted with intake and exhaust systems as shown in the illustration. If the main engine is running under a heavy load at maximum rpm, which pressure would ordinarily be negative? Illustration MP-IX-11 Exhaust discharge to stack Exhaust receiver Air intake Air box New Motor Plants Questions 2018
D A loop-scavenged engine utilizes the motion of its pistons and a turbo-charger to provide scavenging air. Which of the listed mechanical designs prevents the air under the pistons from being pumped back through the scavenge ports during the piston power stroke? Positive pressure from the blower. Masked intake ports. Lower liner seals. Length of the piston skirt. New Motor Plants Questions 2018
A The pneumatic propulsion control system used on your vessel uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for servicing the in-line strainers? Illustration MO-0052 The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with low pressure compressed air. The strainers should be cleaned and rinsed with a non-flammable solvent, then blown dry with high pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with high pressure compressed air. The strainers should be washed with soap and water and rinsed with fresh water, then blown dry with low pressure compressed air. New Motor Plants Questions 2018
B The main engines on your vessel are fitted with speed control governors based on the operating principle shown in the illustration. What statement is true concerning the illustrated pressure- compensated governor? Illustration MP-GV-18 With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted inward and the pilot valve plunger will be in the raised position aligning the control port to the pressure port. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted to vertical and the pilot valve plunger will be in the centered position blocking off the control port. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted to vertical and the pilot valve plunger can be positioned in any position. With the speeder spring compression force and the flyweight centrifugal force in equilibrium, the flyweights are pivoted outward and the pilot valve plunger will be in the lowered position aligning the control port to the drain port. New Motor Plants Questions 2018
C A diesel engine overspeeds and fails to restart when cranked at normal speed. Which of the following problems is the most likely cause for the engine failing to restart? Improper governor operation due to excess oil pressure Damage to the governor due to excessive speed Failure to reset the overspeed trip Failure to reposition the fuel rack New Motor Plants Questions 2018
C A main engine speed control governor for one of your vessel's main propulsion engines hunts, surges, or is sluggish to respond to load changes. Which of the following governor oil conditions would be the greatest single source of governor troubles? Wrong type of oil (composition) Foamy oil (air entrainment) Dirty oil (solid contaminants) Wrong grade of oil (viscosity) New Motor Plants Questions 2018
D The auxiliary steam boiler on your vessel is equipped with a gauge glass for local level indication. On which of the following auxiliary boiler types would this gauge glass be attached to a flash chamber also known as a steam accumulator or steam separator? Water-tube natural-circulation steam boiler Fire-tube steam boiler Electric steam boiler Water-tube forced-circulation steam boiler New Motor Plants Questions 2018
C The rate of heat transfer in a waste-heat boiler can be increased by __________. operating the boiler at less than normal water level increasing the amount of excess air to the burners installing fins on the firesides of water-tubes treating the boiler water with chemical oxygen scavengers New Motor Plants Questions 2018
C On a vessel fitted with a coil-type, forced-circulation, water-tube, oil-fired auxiliary boiler, what is the most practical way of determining if the inside surface of the coil is excessively scaled with hard scale deposits? Monitoring the feed pump pressures. Performing a visual inspection. Monitoring the circulating pump pressures. Measuring the coil inside diameter. New Motor Plants Questions 2018
B The vessel to which you are assigned is gear-driven with one main propulsion diesel engine and a fixed-pitch propeller. While underway, the main engine becomes disabled, requiring your vessel to be towed back into port. If pressurized lubricating oil is not available to the reduction gear shaft bearings, what must be done during the towing operation? The reduction gear input shaft must be prevented from rotating by means of engaging the engine turning gear at the flywheel. The reduction gear output shaft must be prevented from rotating by means of locking the propeller shaft. The reduction gear input shaft must be prevented from rotating my means of engaging the propulsion clutch. The reduction gear input and output shafts must be prevented from rotating by means of blocking the gear teeth. New Motor Plants Questions 2018
A You suspect that the diesel generator in service on your vessel has a low coolant level. Assuming that the cooling water system is pressurized and has no sight glass associated with the expansion tank, which of the following represents the proper procedure for checking the coolant level? Shut down the engine, and allow the engine to cool. With a rag, very slowly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. Allow the engine to continue to run, but with the load removed. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. Shut down the engine. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. Allow the engine to continue to run with a normal load. With a rag, very slowly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. New Motor Plants Questions 2018
A An auxiliary diesel engine on your vessel has experienced a safety shutdown due to high lubricating oil temperature. What is the appropriate response? Allow 2 hours for the engine to cool down before attempting to inspect the engine and correct the cause of the trip before attempting to restart the engine. Allow the engine to cool off for two minutes, then restart and monitor the lubricating oil temperature to verify the cause of the shutdown. Immediately perform the engine inspections to determine the cause of the high oil temperature safety shutdown. Immediately restart the engine, and monitor the oil temperature to verify the cause of the shutdown. New Motor Plants Questions 2018
B The oil platform supply vessel to which you are assigned is fitted with a pneumatic propulsion control system as shown in the illustration. If the astern clutch fails to engage from all control locations, but the ahead clutch properly engages from all control locations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The ahead clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. The astern clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. The control lever at the pneumatic remote control station has a blocked astern clutch engagement pilot port. The control lever at the engine room control station has a blocked astern clutch engagement pilot port. New Motor Plants Questions 2018
C According to the manufacturer's recommendations for a main propulsion diesel engine on an oil rig supply vessel where the fuel oil day tank is above the engine, the maximum allowable pressure drop across the primary suction fuel filter element is 1.5 psig. What would be the equivalent pressure drop in inches of mercury, when the fuel oil day tank is below the engine? 0.75" Hg 1.5" Hg 3.0" Hg 6.0" Hg New Motor Plants Questions 2018
A While warming up the main engines on your offshore utility vessel while tied up at your own pier, one of the main engines suddenly sounds the low lube oil pressure alarm. What is the appropriate initial response? Immediately shutdown the engine, then investigate the cause for the low-pressure alarm. Reduce the load and speed on the engine and continue to monitor the oil pressure. Monitor closely oil pressures, temperatures, and levels while continuing to run the engine. Immediately add make-up oil or service lube oil coolers, strainers, and filters, as appropriate. New Motor Plants Questions 2018
A Prior to starting the main propulsion diesel engines fitted on your platform supply vessel, the crankcase oil level must be checked. At what checked level would you be required to add make-up oil? When the oil level drops below the ADD mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level drops to between the ADD and FULL marks on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level drops below the FULL mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level drops to where it is no longer visible on the side of the dipstick marked ENGINE STOPPED and OIL COLD. New Motor Plants Questions 2018
A You are about to perform valve stem to rocker arm clearance adjustments on an auxiliary diesel engine onboard your offshore supply vessel. Which of the following statements concerning hot and cold clearances is true? When comparing hot and cold valve clearances, the hot clearance will always be less than the cold clearance for a given valve application. When comparing hot and cold valve clearances, it is not possible to predict the hot and cold clearances relative to one another for a given valve application. When comparing hot and cold valve clearances, the hot clearance will always be greater than the cold clearance for a given valve application. When comparing hot and cold valve clearances, the hot and cold valve clearances for a given valve application will always be identical. New Motor Plants Questions 2018
A The drilling platform supply vessel to which you are assigned has diesel generators fitted with unit injectors of the type shown in the illustration. What statement is true concerning the operation of unit injectors of this type? Illustration MP-FI-10 Pressurization of the fuel is accomplished by the mechanically operated rocker arm, and the timing and metering of the fuel is accomplished by the electronically controlled solenoid. Pressurization of the fuel is accomplished by the electronically controlled solenoid, and the timing and metering of the fuel is accomplished by the mechanically operated rocker arm. Pressurization and timing of the fuel is accomplished by the mechanically operated rocker arm, and the metering of the fuel is accomplished by the electronically controlled solenoid. Pressurization and metering of the fuel is accomplished by the mechanically operated rocker arm, and the timing of the fuel is accomplished by the electronically controlled solenoid. New Motor Plants Questions 2018
D When starting a deck winch drive engine in preparation for cargo handling operations, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Fuel oil supply header pressure. Deck winch gear oil pump discharge pressure. Cylinder jacket water pump discharge pressure. Engine lubricating oil supply header pressure. New Motor Plants Questions 2018
C The lube oil quality management system used on your general purpose supply vessel requires on board testing of lubricating oil to include testing for viscosity at the same temperature consistently. In terms of viscosity test results, what statement is true? An unusual drop in viscosity indicates excessive oxidation of the lubricating oil OR excessive dilution of the lubricating oil with diesel fuel oil OR BOTH. An unusual drop in viscosity indicates excessive oxidation of the lubricating oil and an unusual rise in viscosity indicates excessive dilution of the lubricating oil with diesel fuel oil. An unusual drop in viscosity indicates excessive dilution of the lubricating oil with diesel fuel oil and an unusual rise in viscosity indicates excessive oxidation of the lubricating oil. An unusual rise in viscosity indicates excessive oxidation of the lubricating oil OR excessive dilution of the lubricating oil with diesel fuel oil OR BOTH. New Motor Plants Questions 2018
A You are assigned to an OSV fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. When do the exhaust valves open and close respectively? Illustration MO-0084 The exhaust valves open at 55o before bottom dead center on the power stroke. The exhaust valves close at 85o after top dead center on the intake stroke. The exhaust valves open at bottom dead center at the beginning of the exhaust stroke. The exhaust valves close at top dead center at the end of the exhaust stroke. The exhaust valves open at top dead center at the end of the exhaust stroke. The exhaust valves close at bottom dead center at the beginning of the exhaust stroke. The exhaust valves open at 85o after top dead center on the intake stroke. The exhaust valves close at 55o before bottom dead center on the power stroke. New Motor Plants Questions 2018
D An engine that runs rough may indicate a misfiring cylinder. Various techniques associated with disabling the injectors sequentially, in turn, may be used to locate the misfiring cylinder on auxiliary diesel engines of the size used on offshore supply vessels. What type of fuel injectors are disabled for troubleshooting purposes by loosening the high-pressure fuel injection line fitting at the injector nozzle? Mechanically operated unit injectors where each injection pump plunger and injection nozzle are integrated into one self-contained unit. Mechanically operated injection nozzles where each nozzle is supplied by a separately housed pressure/time (PT) metering pump. Electronically operated unit injectors where each injection pump plunger and injection nozzle are integrated into one self-contained unit. Hydraulically operated injection nozzles where each nozzle is supplied by separately housed injection pump plungers in a multi-plunger pump. New Motor Plants Questions 2018
C Due to the questionable mineral content of fresh water taken on from shore as a source of make-up water for diesel engine closed, recirculating cooling water systems, besides chemical treatment and coolant testing, what is the best line of defense in minimizing cooling system problems? Maintaining cooling water temperatures at higher than normal values. Increasing the frequency of draining, flushing, and re-filling the system. Maintaining a tight system and promptly repairing leaks. Maintaining cooling water temperatures at lower than normal values. New Motor Plants Questions 2018
A You are preparing to change the oil of the speed control governor on one of the main propulsion diesel engines on your OSV. What statement is true concerning the draining and flushing procedures? The governor oil should be drained while the oil is hot and the governor should be flushed with the lightest grade of the same type of oil. The governor oil should be drained while the oil is hot and the governor should be flushed with the heaviest grade of the same type of oil. The governor oil should be drained while the oil is cold and the governor should be flushed with the heaviest grade of the same type of oil. The governor oil should be drained while the oil is cold and the governor should be flushed with the lightest grade of the same type of oil. New Motor Plants Questions 2018
C The turbocharged, four-stroke, main propulsion diesel engines on your offshore supply vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators? The engine should be running at rated RPM with no load (propulsion clutch disengaged). The engine should be running at idle RPM with no load (propulsion clutch disengaged). The engine should be running at rated RPM with full load (propulsion clutch engaged). The engine should be running at idle RPM with minimal load (propulsion clutch engaged). New Motor Plants Questions 2018
D The fresh water cooling systems serving the main engines of your offshore supply vessel are of the type shown in the illustration. What statement accurately describes the characteristics of the fresh water cooling circuit? Illustration MP-CW-15 The fresh water circuit is a vented system using an automotive type 2-way thermostatic control valve for temperature control. The fresh water circuit is a pressurized system using an automotive type 2-way thermostatic control valve for temperature control. The fresh water circuit is a pressurized system using a stationary/marine type 3-way thermostatic control valve for temperature control. The fresh water circuit is a vented system using a stationary/marine type 3-way thermostatic control valve for temperature control. New Motor Plants Questions 2018
C A main engine speed control governor for one of your offshore supply vessel's main propulsion engines hunts, surges, or is sluggish to respond to load changes. Which of the following governor oil conditions would be the greatest single source of governor troubles? Foamy oil (air entrainment). Wrong grade of oil (viscosity). Dirty oil (solid contaminants). Wrong type of oil (composition). New Motor Plants Questions 2018
B Your general-purpose supply vessel is fitted with a coil-type, water-tube, and forced-circulation auxiliary boiler. What statement best represents the conditions associated with coil watersides inspection and cleaning? Coil watersides are relatively easy to inspect AND mechanical cleaning with water jet or wire brush is a practical and efficient method of scale removal. Coil watersides are very difficult to inspect AND chemical cleaning with a suitable acid is the only practical and efficient method of scale removal. Coil watersides are relatively easy to inspect AND chemical cleaning with a suitable acid is the only practical and efficient method of scale removal. Coil watersides are very difficult to inspect AND mechanical cleaning with water jet or wire brush is a practical and efficient method of scale removal. New Motor Plants Questions 2018
D After performing repairs on the fuel injection system or governor of a main propulsion diesel engine on your offshore platform supply vessel, what precaution should be taken prior to starting the engine? Provisions should be made to shut off the engine's lubricating oil supply to stop the engine in case there is an overspeed on start-up. Provisions should be made to shut off the engine's control electrical power supply to stop the engine in case there is an overspeed on start-up. Provisions should be made to shut off the engine's starting air supply to stop the engine in case there is an overspeed on start-up. Provisions should be made to shut off the engine's inlet air and/or fuel supply to stop the engine in case there is an overspeed on start-up. New Motor Plants Questions 2018
B An engine that emits black smoke through the stack may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your oil platform supply vessel have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high-pressure fuel injection line fitting at the injector nozzle while the engine is running and noting the response of the engine in terms emission of black smoke. Which of the following statements is true? After disabling the injector of a given cylinder, if the engine previously producing black smoke now produces even denser black smoke, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the engine previously producing black smoke now produces a clear stack, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the engine previously producing a clear exhaust now produces black smoke, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the engine previously producing black smoke continues to produce equally dense black smoke, this indicates that the cylinder associated with the disabled injector is misfiring. New Motor Plants Questions 2018
A The main propulsion diesel engines on your offshore supply vessel are fitted with mechanically operated and controlled unit injectors. In order for the engine to run properly, the injectors must be properly timed relative to the camshaft and properly synchronized relative to the other injectors. In terms of timing and synchronization, what statement is true? Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, but injector synchronization is achieved by adjusting the control racks of the injectors to the proper setting. Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the cam follower heights of the injectors to the proper setting. Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the control racks of the injectors to the proper setting. Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, but injector synchronization is achieved by adjusting the cam follower heights of the injectors to the proper setting. New Motor Plants Questions 2018
A The main propulsion diesel engines fitted on your OSV are started with vane-type air-starting motors. What statement concerning air-start motor lubricator maintenance is true? (Assume a metal bowl fitted with a tubular sight glass.) The lubricator reservoir bowl should be re-filled with clean oil when it becomes approximately half full as shown in the glass. The lubricator reservoir bowl should be re-filled with clean oil when the level is no longer visible in the glass. The lubricator reservoir bowl should be re-filled with clean oil as soon as the level drops to the very upper part of the glass. The lubricator reservoir bowl should be re-filled with clean oil when it is estimated that the bowl is completely empty. New Motor Plants Questions 2018
C The multi-purpose supply vessel to which you are assigned has main engines fitted with injectors similar to those shown in the illustration. What statement is true concerning the operating principle of this type of injector? Illustration MP-FI-22 The fuel pressure within the annulus and the compression load on the spring are both needle valve closing forces. The fuel pressure within the annulus is a needle valve closing force, the compression load on the spring is a needle valve opening force. The fuel pressure within the annulus is a needle valve opening force, the compression load on the spring is a needle valve closing force. The fuel pressure within the annulus and the compression load on the spring are both needle valve opening forces. New Motor Plants Questions 2018
B You suspect that a diesel generator set on your anchor-handling supply vessel has a misfiring cylinder because the engine, although warm, is running roughly. The six-cylinder engine is fitted with a multi-plunger in-line high pressure fuel injection pump with hydraulically operated injector nozzles. When you slacken the high pressure fuel line fitting at #5 fuel injector nozzle, the engine continues to run roughly as before with no real change. Upon re-tightening the high pressure fuel line fitting, the engine begins and continues to run smoothly. What does this indicate? #5 cylinder was and continues to be firing properly. #1, #2, #3, or #4 cylinder is misfiring. # 6 cylinder is firing properly. #5 cylinder had been misfiring. You have successfully purged the air from the #5 cylinder high pressure fuel line, and the engine is no longer misfiring. #5 cylinder was and continues to be firing properly. #6 cylinder is misfiring. #1, #2, #3, and #4 cylinders are all firing properly. #5 cylinder was and continues to be misfiring. You have successfully located the misfiring cylinder. New Motor Plants Questions 2018
D The winch drive engine on the anchor handling supply vessel to which you are assigned is fitted with a Roots-type blower as shown in the illustration. What statement is true concerning this blower? Illustration MP-CA-09 Rotor "1" turns counter-clockwise, and rotor "2" turns clockwise. Area "3" is the suction passage, and area "4" is the discharge passage. Rotor "1" turns clockwise, and rotor "2" turns counter-clockwise. Area "3" is the discharge passage, and area "4" is the suction passage. Rotor "1" turns clockwise, and rotor "2" turns counter-clockwise. Area "3" is the suction passage, and area "4" is the discharge passage. Rotor "1" turns counter-clockwise, and rotor "2" turns clockwise. Area "3" is the discharge passage, and area "4" is the suction passage. New Motor Plants Questions 2018
B You are assigned as an engineer on an offshore platform supply vessel using main propulsion engines of the type shown in the illustration. What statement represents the procedure for inspection of the upper cylinder liner bore while in place inside the engine? Illustration MP-MS-04 With the particular piston positioned at TDC and the corresponding oil pan handhold cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at BDC and the corresponding air box handhold cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at TDC and the corresponding air box handhold cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at BDC and the corresponding oil pan handhold cover removed, inspect the upper liner bore through the scavenging air ports. New Motor Plants Questions 2018
B The offshore supply vessel to which you are assigned is fitted with reversing reduction gears equipped with airflex pneumatic tire-type friction clutches. With the bridge in control of the main engines, you hear unusual screeching noises coming from the clutches, but only when transitioning from one direction to the other. Given the situation of changing direction from ahead to astern as an example, what is the most likely cause? The EOT handle is being left in ahead idle and then in neutral for too long a period of time. The EOT handle is being left in neutral and then in astern idle for too short a period of time. The EOT handle is being left in ahead idle and then in neutral for too short a period of time. The EOT handle is being left in neutral and then in astern idle for too long a period of time. New Motor Plants Questions 2018
D While underway in open waters on your platform supply vessel, the low clutch air pressure alarm sounds and the faint odor of burning rubber is detected. What is the appropriate response? Reduce the load and speed on the engine, then investigate the cause of low clutch air pressure. Investigate the cause of low clutch air pressure, then reduce the engine load and speed if necessary. Investigate the cause of low clutch air pressure, then bring the throttle and clutch control to the stop position if necessary. Bring the throttle and clutch control to the stop position, then investigate the cause of low clutch air pressure. New Motor Plants Questions 2018
D You are observing the flame condition on an oil-fired auxiliary boiler installed on your anchor-handling supply vessel through an observation window peephole. The flame is a reddish color accompanied by a noticeably panting/pulsating furnace. What would be the correlating color of the gases exhausting from the stack under these conditions? Light brown haze White smoke Clear stack Dense black smoke New Motor Plants Questions 2018
C The turbochargers on the main propulsion engines on the OSV to which you are assigned are fitted with an exhaust inlet screen to protect the turbocharger turbine. Upon inspection, pieces of broken piston rings or exhaust valves are found in the foreign object trap box. Besides removing this debris, with respect to the screen what should be done? The screen should be placed in a press to remove any indentations from impingement. The screen should be replaced without conducting any further checking or investigation. The screen should be magnafluxed to check for damage not visible to the naked eye. The screen should be replaced only when damage is obvious to the naked eye. New Motor Plants Questions 2018
A The main diesel engines on the OSV to which you are assigned are fitted with a basket type lube oil strainer, which must be periodically cleaned. The engine manufacturer recommends using a petroleum based solvent for cleaning. Which of the following would typically be acceptable? A high flash point solvent such as kerosene or diesel fuel. A low flash point solvent such as gasoline. An aromatic solvent such as benzene or toluene. A chlorinated solvent such as perchlorethylene or trichloroethylene. New Motor Plants Questions 2018
B The diesel fuels burned in auxiliary and main diesel engines of offshore supply vessels serving drilling platforms are required to meet certain specifications. Among these are limits of certain contaminants to limit atmospheric emissions to acceptable levels. Which of the following soluble contaminants is applicable? Total sediment Sulfur Water Asphaltenes New Motor Plants Questions 2018
D The offshore supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. Which valve is responsible for processing a clutch inflation pressure at speed signal pilot pressure during periods of clutch slip maneuvering at low engine rpm? Illustration MP-IC-08 H5 governor limit relay air valve H5 inflation air relay valve H5 boost relay air valve C2 speed-slip relay valve New Motor Plants Questions 2018
D The OSV to which you are assigned is fitted with a pneumatic propulsion control system as shown in the illustration. All propulsion controls function properly from all locations with the exception of the pneumatic remote control station. Here the propulsion engine will run only at idle and neither propulsion clutch will engage regardless of the throttle lever control position. Which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The local/remote transfer valve at the engine room control station has a blocked remote port. The attendance valve at the pilothouse pneumatic master control station has a blocked outlet port. The throttle lever control at the pneumatic remote control station has a blocked speed signal pilot air port. The pilot house/remote transfer valve at the pilothouse pneumatic master control station has a blocked remote port. New Motor Plants Questions 2018
B The oil spill response vessel to which you are assigned is fitted with reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear? Illustration MP-DS-04 The reduction gear is a double-input, double-reduction type of gear. The reduction gear is a single-input, single-reduction type of gear. The reduction gear is a double-input, single-reduction type of gear. The reduction gear is a single-input, double-reduction type of gear. New Motor Plants Questions 2018
C After a main diesel engine on your oil platform construction support vessel has experienced a safety shutdown due to excessive crankcase pressure, why is it important to wait 2 hours before opening the crankcase to investigate the cause of the trip? Opening the crankcase before 2 hours has elapsed may result in the engine spontaneously restarting. Opening the crankcase before 2 hours has elapsed may result in excessively rapid cooling. Opening the crankcase before 2 hours has elapsed may result in a crankcase explosion. Opening the crankcase before 2 hours has elapsed may result in crankshaft rotation. New Motor Plants Questions 2018
A You are serving as a Chief Engineer (DDE) onboard an OSV equipped with main propulsion diesel engines of the type represented by the polar timing diagram shown in the illustration. What description best describes the engine type? Illustration MO-0084 Turbocharged, 4-stroke cycle engine. Turbocharged, 2-stroke cycle engine. Naturally aspirated, 4-stroke cycle engine. Naturally aspirated, 2-stroke cycle engine. New Motor Plants Questions 2018
A The fresh water cooling systems serving the main engines on your anchor-handling supply boat are arranged as shown in the illustration. If the fresh water thermostatic control valve fails in the position where 100% of the flow from flange "A" is permanently ported to flange "C" and flange "B" is permanently blocked, while starting and warming the engine with no load, what would be the resulting warm up time period? Illustration MP-CW-15 With no load, the engine would require a much longer than normal time frame to warm up. With no load, the engine would require a relatively normal time frame to warm up. With no load, it is not possible to describe the time frame required to warm up the engine. With no load, the engine would require a much shorter than normal time frame to warm up. New Motor Plants Questions 2018
C The various auxiliary diesel engines fitted on your anchor-handling vessel may employ a variety of different cranking methods for engine starting. What type of cranking method is shown in the illustration? Illustration MP-SR-04 Gasoline engine cranking motor Electric cranking motor Air cranking motor Hydraulic cranking motor New Motor Plants Questions 2018
C The main engines on the anchor-handling supply boat to which you are assigned are fitted with duplex secondary spin-on fuel filters. Concerning the selector handle, what statement is true? The selector handle is normally placed in the "BOTH" position regardless of the load or rpm on the engine in order to be able to double the fuel handling throughput at any load or rpm and allow the engine speed to be changed without worrying about the selector handle position. The selector handle is placed in the "BOTH" position when the engine is running at high load or rpm to accommodate higher fuel delivery requirements. When the engine is running at low load or rpm, the selector handle is placed in either the "1" or "2" position. The selector handle is placed in either position the "1" or "2" position regardless of the load or rpm on the engine. The selector handle is temporarily placed in the "BOTH" position only when transitioning from a restricted filter element over to a clean filter element. The selector handle is placed in the "BOTH" position when the engine is running at low load or rpm. When the engine is running at high load or rpm, the selector handle is placed in either the "1" or "2" position depending upon which filter element is clean. New Motor Plants Questions 2018
A The multi-purpose offshore supply vessel to which you are assigned is fitted with main propulsion diesel engines of the type shown in the illustration. In terms of valve operating gear, cylinder liner type, and connecting rod type, what statement is true? Illustration MP-MS-07 This is a pushrod operated overhead valve engine, with wet cylinder liners and conventional connecting rods. This is an overhead cam engine, with jacketed cylinder liners and marine-type connecting rods. This is a pushrod operated overhead valve engine, with jacketed cylinder liners and articulated connecting rods. This is an overhead cam engine, with wet cylinder liners and conventional connecting rods. New Motor Plants Questions 2018
D The steam generating plant on your oil platform supply vessel is of the type shown in the illustration. Which of the labeled components would be the steam separator? Illustration MP-SP-20 1 2 3 5 New Motor Plants Questions 2018
C The two-stroke cycle main propulsion engines on the supply boat to which you are assigned are fitted with Roots-type blowers for scavenging purposes. Upon inspection of the air boxes, what condition would indicate a need to replace the Roots-type blower immediately? Water accumulations Iron dust residue Aluminum dust residue Oil accumulations New Motor Plants Questions 2018
A The offshore oil spill response vessel to which you are assigned is fitted with auxiliary engines as partly shown in the illustration. What statement is true concerning the valve guide and valve seat arrangements? Illustration MP-HS-03 The valve guides are replaceable inserts, and the valve seats are integral (non-replaceable). The valve guides and the valve seats are both integral (non-replaceable). The valve guides are integral (non-replaceable), and the valve seats are replaceable inserts. The valve guides and the valve seats are both replaceable inserts. New Motor Plants Questions 2018
B What statement concerning fuel cetane rating and the ignition delay period is true as it applies to offshore anchor handling vessel main propulsion diesel engines? The ignition delay period is the lag in time between when fuel injection is initiated and when fuel injection actually begins, and the higher the cetane rating of the fuel the shorter the ignition delay period. The ignition delay period is the lag in time between when fuel injection actually begins and when combustion actually begins, and the higher the cetane rating of the fuel the shorter the ignition delay period. The ignition delay period is the lag in time between when fuel injection actually begins and when combustion actually begins, and the higher the cetane rating of the fuel the longer the ignition delay period. The ignition delay period is the lag in time between when fuel injection is initiated and when fuel injection actually begins, and the higher the cetane rating of the fuel the longer the ignition delay period. New Motor Plants Questions 2018
B The offshore supply vessel to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the attached fuel oil pump and the hand priming fuel oil pump from discharging through the other, what other purpose do the anti-flood check valves serve? Illustration MP-FO-06 They prevent backflow of fuel from the engine to the day tank when the engine is shut down and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shut down and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located above the engine. New Motor Plants Questions 2018
B A diesel generator set on your anchor-handling supply vessel has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the inlet pressure is increasing and the outlet pressure is decreasing, resulting in an unacceptable pressure drop. What should be done? Illustration MO-0057 While the engine is running, the drain plug (B) should be carefully loosened to drain the sludge from the strainer sump. While the engine is running, the cleaning handle (A) should be rotated one or more full turns to remove the accumulated dirt from the disk stack (C). While the engine is running, the cleaning handle (A) should be rotated one-half turn to remove the accumulated dirt from the disk stack (C). The drain plug (B) is removed to drain the sludge from the strainer sump, but the engine must be stopped to perform this operation. New Motor Plants Questions 2018
A The deck winch on your oil platform construction support vessel is fitted with a speed control governor of the type shown in the illustration. In addition to variable governed speed setting, what other group of settings is built into this particular governor? Illustration MP-GV-10 Engine idle speed (minimum governed speed) Engine speed limit (maximum governed speed) Engine load limit (maximum fuel delivery) Engine speed limit (maximum governed speed) Engine idle speed (minimum governed speed) Engine speed limit (maximum governed speed) Engine load limit (maximum fuel delivery) Engine idle speed (minimum governed speed) Engine load limit (maximum fuel delivery) New Motor Plants Questions 2018
D The platform supply vessel to which you are assigned is fitted with auxiliary diesel engines of the type shown in the illustration. In terms of valve operating gear and cylinder liner type, what statement is true? Illustration MP-HS-07 This is an overhead cam engine with dry cylinder liners. This is a pushrod operated overhead valve engine with wet cylinder liners. This is an overhead cam engine with wet cylinder liners. This is a pushrod operated overhead valve engine with dry cylinder liners. New Motor Plants Questions 2018
D The auxiliary steam boiler on your oil platform supply vessel is equipped with soot blowers for maintaining heat transfer efficiency. On which of the following auxiliary boiler types would soot blowers most likely be fitted? Fire-tube steam boiler Electric steam boiler Water-tube forced-circulation steam boiler Water-tube natural-circulation steam boiler New Motor Plants Questions 2018
B The main diesel propulsion engines on your offshore supply vessel are protected with a mechanical over speed trip mechanism similar to that shown in the illustration. Upon testing the trip setting, you discover that it is necessary to make an adjustment. Assuming that several adjustments may be necessary before the final setting is accurately achieved, what statement concerning adjustment is true? Illustration MO-0101 To adjust the over speed trip, the engine must be stopped AND the locknut must be retightened only after the final adjustment. To adjust the over speed trip, the engine must be stopped AND the locknut must be retightened after each adjustment. To adjust the over speed trip, the engine must be running AND the locknut must be retightened after each adjustment. To adjust the over speed trip, the engine must be running AND the locknut must be retightened only after the final adjustment. New Motor Plants Questions 2018
D The thermal fluid heating oil system on your offshore supply vessel is configured similarly to that shown in the illustration. What system component performs expansion and dearation functions? Illustration MP-SP-23 1 2 4 5 New Motor Plants Questions 2018
A The diesel generator set drive engines on your offshore supply boat are protected with heavy-duty oil bath air cleaners. The oil within these air cleaners should be periodically replaced in accordance with manufacturer recommendations. What statement best describes when it would be appropriate to deviate from the recommended frequency? Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. New Motor Plants Questions 2018
B Water-jacketed exhaust manifolds as used on anchor-handling supply vessel main engines require periodic inspection of the jackets and scale removal as necessary. What would be the impact of a failure to remove scale deposits on a timely basis? Excessive scale deposits would increase heat transfer and raise the temperature of the inside wall of the exhaust manifold. Excessive scale deposits would decrease heat transfer and raise the temperature of the inside wall of the exhaust manifold. Excessive scale deposits would decrease heat transfer and lower the temperature of the inside wall of the exhaust manifold. Excessive scale deposits would increase heat transfer and lower the temperature of the inside wall of the exhaust manifold. New Motor Plants Questions 2018
A When checking the cylinder jacket water-cooling expansion tank level on a main propulsion diesel engine on your offshore crew boat while underway, what should be the expansion tank level? The level should be in the upper part of the sight glass when the engine is at operating temperature. The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature. The level should be in the lower part of the sight glass when the engine is at operating temperature. The level should be out of sight high in the sight glass when the engine is at operating temperature. New Motor Plants Questions 2018
C The main engines on your multi-purpose supply vessel are equipped with over speed trip devices as shown in the illustration. What statement concerning the operation of the over speed trip is true? Illustration MP-IC-15 The over speed trip senses oil pressure proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The over speed trip senses centrifugal force proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. The over speed trip senses centrifugal force proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The over speed trip senses oil pressure proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. New Motor Plants Questions 2018
D The lubricating oil system supporting the main propulsion reduction gear on the anchor-handling supply vessel to which you are assigned is fitted with a lube oil strainer as shown in the illustration. What strainer attribute will dictate the degree of filtration in terms of the particle size capable of being filtered? Illustration MO-0057 The length of the oil sump enclosing the straining element. The number of discs in the disc-stack making up the straining element. The dimensions of the triangular oil passages in each disc conveying the strained oil upward. Vertical spacing between the metal discs as determined by the thickness of the cleaner blades. New Motor Plants Questions 2018
B Various diesel engines onboard your offshore supply vessel are started by means of either vane- type or turbine air-starting motors. At a minimum, in the absence of automatic drain valves, how often should moisture separators be drained of moisture while the vessel is underway? Hourly Daily Weekly Monthly New Motor Plants Questions 2018
A Diesel engine closed, recirculating cooling water systems are particularly prone to cavitation corrosion/erosion. Which of the listed cooling system/engine components has surfaces in contact with the coolant that are most susceptible to this type of corrosion and erosion? Wet-type cylinder liners. Engine exhaust cooling water jackets. Cylinder cooling water jackets. Cylinder head cooling water passages. New Motor Plants Questions 2018
C Your platform supply vessel is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. Which heat exchanger/cooler application and aspect would most likely require periodic mechanical cleaning with a specially designed brush? Illustration MP-CW-15 The outside of the tubes of the lube oil cooler. The inside of the tubes of the lube oil cooler. The inside of the tubes of the RW/FW heat exchanger. The outside of the tubes of the RW/FW heat exchanger. New Motor Plants Questions 2018
B The platform supply vessel to which you are assigned has a main engine fuel system as shown in the illustration. When the filter and water separator as shown in the day tank fill line are combined into one unit, what is this called? Illustration MP-FO-06 An adsorption type filter. A coalescing type filter. An absorption type filter. A strainer. New Motor Plants Questions 2018
B The main engines on your anchor handling supply vessel are equipped with manual shutdown levers as shown in the illustration. What statement concerning manual shutdown is true? Illustration MP-IC-15 The manual shutdown lever is operated by means of a remote pull cable and uses the governor fuel control linkage to accomplish engine shutdown. The manual shutdown lever is operated by means of a remote pull cable and uses the over speed trip mechanism to accomplish engine shutdown. The manual shutdown lever is operated by means of the emergency trip reset lever and uses the governor fuel control linkage. The manual shutdown lever is operated by means of the over speed trip reset lever and uses the over speed trip mechanism to accomplish engine shutdown. New Motor Plants Questions 2018
D On diesel engines used on a multi-purpose supply vessel, which type of injection system is most likely to use sophisticated electronic controls for timing and metering? Rotary plunger type pump In-line multi-plunger pump Distributor type pump Unit injector type pump New Motor Plants Questions 2018
C The various auxiliary diesel engines fitted on your offshore oil spill response vessel may employ a variety of different starting systems. What type of starting system is shown in the illustration? Illustration MP-SR-05 Gas engine power operated system. Pneumatic power operated system. Hydraulic power operated system. Electric power operated system. New Motor Plants Questions 2018
C The oil platform supply vessel to which you are assigned is fitted with main propulsion engines driving through pneumatic airflex clutches as shown in the illustration. What statement is true concerning this type of clutch? Illustration MP-DS-11 The clutch is an expanding type clutch and expands to engage against the clutch drum when inflated. The clutch is a constricting type clutch and constricts to engage against the clutch gland when inflated. The clutch is a constricting type clutch and constricts to engage against the clutch drum when inflated. The clutch is an expanding type clutch and expands to engage against the clutch gland when inflated. New Motor Plants Questions 2018
C Prior to starting a diesel generator set engine fitted on your anchor handling vessel, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil? When the oil level rises to a level well above the FULL mark on the dipstick. When the oil level rises to the ADD mark on the dipstick. When the oil level rises to the FULL mark on the dipstick. When the oil level rises to the between the ADD and FULL marks on the dipstick. New Motor Plants Questions 2018
D The anchor-handling vessel to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In terms of operating cycle and cylinder configuration, what statement is true? Illustration MP-HS-03 This is a four-stroke cycle, 60o V-type engine. This is a two-stroke cycle, 90o V-type engine. This is a four-stroke cycle, 90o V-type engine. This is a two-stroke cycle, 60o V-type engine. New Motor Plants Questions 2018
B For diesel engines, such as those used for main propulsion and auxiliary power on offshore supply vessels, while running at speed, how is the ignition of fuel within the cylinder achieved? Ignition is achieved by the heat of compression created by compressing the air/fuel mixture within the cylinder into a relatively small volume. Ignition is achieved by the heat of compression created by compressing intake/charge air within the cylinder into a relatively small volume. Ignition is achieved by intense heat by passing electric current through the element of a specially designed glow plug. Ignition is achieved by a high voltage electric spark induced across the gap of a specially designed spark plug. New Motor Plants Questions 2018
C The main diesel engines on the OSV to which you are assigned are fitted with a metal-edge duplex suction fuel strainer, where the elements must be periodically cleaned. The engine manufacturer recommends using a petroleum based solvent for cleaning. Which of the following would typically be acceptable? Benzene or toluene. White mineral spirits. Kerosene or diesel fuel. Perchlorethylene or trichlorethylene. New Motor Plants Questions 2018
A The main propulsion diesel engines on your anchor-handling supply vessel are fitted with conventional hydraulically operated injector nozzles of the orifice type. When testing an injector by performing a pop-test on an injector test stand, you observe no leakage prior to reaching the popping pressure, the pressure holds at just below the popping pressure, the actual popping pressure is within specification, but the spray pattern is distorted. What maintenance is required? The injector nozzle tip orifices must be reconditioned by cleaning or the tip replaced. The injector spindle and nozzle holder bore must be reconditioned or replaced. The injector spring compression must be readjusted or a broken spring replaced. The injector needle valve and seat must be reconditioned or replaced. New Motor Plants Questions 2018
D You are assigned to an uninspected fishing industry line vessel fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. What events or effects are represented by "II", "III", and "IV" respectively? Illustration MO-0037 "II" represents the scavenging period where the scavenging air ports are uncovered. "III" represents a pressure loss effect where the cylinder pressure is lowered by exhaust blowdown. "IV" represents the exhaust period where the exhaust valves are held open. "II" represents the exhaust period where the exhaust valves are held open. "III" represents a supercharging effect where the cylinder pressure is boosted with the scavenging air blower. "IV" represents the scavenging period where the scavenging air ports are uncovered. "II" represents the exhaust period where the exhaust valves are held open. "III" represents a pressure loss effect where the cylinder pressure is lowered by exhaust blowdown. "IV" represents the scavenging period where the scavenging air ports are uncovered. "II" represents the scavenging period where the scavenging air ports are uncovered. "III" represents a supercharging effect where the cylinder pressure is boosted with the scavenging air blower. "IV" represents the exhaust period where the exhaust valves are held open. New Motor Plants Questions 2018
C You are assigned to a fishery research vessel fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. When do the intake valves open and close respectively? Illustration MO-0084 The intake valves open at top dead center at the beginning of the intake stroke. The intake valves close at bottom dead center at the end of the intake stroke. The intake valves open at 45o after bottom dead center on the compression stroke. The intake valves close at 75o before top dead center on the exhaust. The intake valves open at 75o before top dead center on the exhaust stroke. The intake valves close at 45o after bottom dead center on the compression stroke. The intake valves open at bottom dead center at the end of the intake stroke. The intake valves close at top dead center at the beginning of the intake stroke. New Motor Plants Questions 2018
D You are assigned as an engineer on a fishing research vessel using main propulsion engines of the type shown in the illustration. What statement represents the procedure for inspection of the upper cylinder liner bore while in place inside the engine? Illustration MO-0122 With the particular piston positioned at BDC and the corresponding oil pan handhole cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at TDC and the corresponding oil pan handhole cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at TDC and the corresponding air box handhole cover removed, inspect the upper liner bore through the scavenging air ports. With the particular piston positioned at BDC and the corresponding air box handhole cover removed, inspect the upper liner bore through the scavenging air ports. New Motor Plants Questions 2018
B You are assigned as an engineer on a fishing industry factory ship using main propulsion engines of the type shown in the illustration. Assuming that the piston is properly positioned, what statement represents the procedure for inspection of the compression rings while in place inside the engine? Illustration MO-0122 It is not possible to inspect the compression rings while in place inside the engine. The inspection takes place by removing the appropriate air box handhole cover and viewing through the resulting opening. The inspection takes place by removing the appropriate cylinder head valve cover and viewing through the resulting opening. The inspection takes place by removing the appropriate oil pan cover and viewing through the resulting opening. New Motor Plants Questions 2018
A You are analyzing the data used for trend analysis for a two-stroke main propulsion diesel engine on your fishing trawler. Although the engine has yet to experience a safety shutdown on high crankcase pressure, over time the crankcase pressure (which normally runs in a vacuum) has gradually become less negative. Which of the following failures would most likely be responsible for this condition? Worn piston compression rings Leaking crankcase handhole cover Burned cylinder exhaust valve Dribbling injector needle valve New Motor Plants Questions 2018
A You are analyzing the data used for trend analysis for one of the main propulsion diesel engines on the fishery research vessel to which you are assigned. The cylinder exhaust temperature of one of the cylinders is significantly lower than the others. When analyzing compression and firing pressure data, however, the numbers are within the normal range for this particular cylinder. What condition would produce these results? Excessive carbon build-up on exhaust pyrometer probe of affected cylinder. Leaking fuel injector needle valve for affected cylinder. Leaking exhaust valve on affected cylinder. Excessive carbon build-up on air inlet ports or valves of affected cylinder. New Motor Plants Questions 2018
C Before shutting down the main propulsion engines on a fishing industry factory ship, ideally what should be accomplished FIRST? The engine should be shut down immediately with no delay period, regardless of the engine load. The engine should be operated at rated load for several minutes, and then shut down. The engine should be operated with the load removed from the engine for several minutes, then shut down. The engine should be operated at a steady, but substantial load for several minutes, and then shut down. New Motor Plants Questions 2018
C Prior to starting a main propulsion diesel engine fitted on your fishing trawler, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil? When the oil level rises to the between the ADD and FULL marks on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to the ADD mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to the FULL mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. When the oil level rises to a level well above the FULL mark on the side of the dipstick marked ENGINE STOPPED and OIL COLD. New Motor Plants Questions 2018
A Prior to starting a diesel generator set engine fitted on your fishery research vessel, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil? When the oil level rises to the FULL mark on the dipstick. When the oil level rises to the ADD mark on the dipstick. When the oil level rises to a level well above the FULL mark on the dipstick. When the oil level rises to the between the ADD and FULL marks on the dipstick. New Motor Plants Questions 2018
D When checking the crankcase oil level on an off-line diesel generator set engine on your uninspected fishing trawler, what should be the oil level as indicated on the dipstick? The level should be below the ADD mark on the dipstick. The level should be well above the FULL mark on the dipstick. The actual level is unimportant as long as it is visible on the dipstick. The level should be between the FULL and ADD marks on the dipstick. New Motor Plants Questions 2018
D The uninspected fishing trawler to which you are assigned is fitted with main propulsion diesel engines of the type shown in the illustration. In terms of valve operating gear, cylinder liner type, and connecting rod type, what statement is true? Illustration MO-0005 This is a pushrod operated overhead valve engine, with jacketed cylinder liners and articulated connecting rods. This is an overhead cam engine, with wet cylinder liners and conventional connecting rods. This is an overhead cam engine, with jacketed cylinder liners and marine-type connecting rods. This is a pushrod operated overhead valve engine, with wet cylinder liners and conventional connecting rods. New Motor Plants Questions 2018
A The fishing industry line vessel to which you are assigned is fitted with main propulsion diesel engines of the type shown in the illustration. In terms of valve operating gear, cylinder liner type, and connecting rod type, what statement is true? Illustration MO-0122 This is an overhead cam engine, with jacketed cylinder liners and hinged-strap, fork-and- blade connecting rods. This is a pushrod operated overhead valve engine, with wet cylinder liners and hinged-strap, fork-and-blade connecting rods. This is a pushrod operated overhead valve engine, with jacketed cylinder liners and conventional connecting rods. This is an overhead cam engine, with wet cylinder liners, and marine-type connecting rods. New Motor Plants Questions 2018
A The mollusc dredger to which you are assigned is fitted with generator set drive engines as shown in the illustration. What statement is true in terms of the combustion chamber design? Illustration MO-0006 The engine uses an open type combustion chamber with a flat fire-deck. The engine uses turbulence chambers with a hemispherical fire-deck. The engine uses pre-combustion chambers with a flat fire-deck. The engine uses an open type combustion chamber with a hemispherical fire-deck. New Motor Plants Questions 2018
D The uninspected fishing trawler to which you are assigned is fitted with auxiliary engines as partly shown in the illustration. What statement is true concerning the valve guide and valve seat arrangements? Illustration MO-0013 The valve guides are replaceable inserts, and the valve seats are integral (non-replaceable). The valve guides and the valve seats are both integral (non-replaceable). The valve guides are integral (non-replaceable), and the valve seats are replaceable inserts. The valve guides and the valve seats are both replaceable inserts. New Motor Plants Questions 2018
D The main propulsion diesel engines fitted on your fishing industry factory ship are started with compressed air using the system illustrated. What would be the FIRST consequence of having the start solenoid valve energized open by depressing the start button? Illustration MP-SR-08 The upper cranking air motor drive pinion is engaged to the engine flywheel. The upper cranking air motor drive pinion is disengaged from the engine flywheel. The lower cranking air motor drive pinion is disengaged from the engine flywheel. The lower cranking air motor drive pinion is engaged to the engine flywheel. New Motor Plants Questions 2018
D The various auxiliary diesel engines fitted on your fishery research vessel may employ a variety of different starting systems. What type of starting system is shown in the illustration? Illustration MO-0049 Electric power operated system. Pneumatic power operated system. Gas engine power operated system. Hydraulic power operated system. New Motor Plants Questions 2018
B The main propulsion engines onboard your uninspected fishing trawler use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-14 Shunt filtration. Bypass filtration. Full-flow filtration. Sump filtration. New Motor Plants Questions 2018
C The main propulsion engines onboard your oil fishing industry factory ship use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MP-LO-09 Full-flow filtration. Shunt filtration. Sump filtration. Bypass filtration. New Motor Plants Questions 2018
B The fishing industry factory ship to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. What type of turbo charging configuration is used? Illustration MP-IX-14 two-stage turbo charging. Pulse turbo charging. Constant pressure turbo charging. Boost-controlled turbo charging. New Motor Plants Questions 2018
C The fresh water cooling systems serving the main engines of your uninspected fishing industry vessel are of the type shown in the illustration. What statement accurately describes the characteristics of the fresh water cooling circuit? Illustration MP-CW-15 The fresh water circuit is a pressurized system using an automotive type 2-way thermostatic control valve for temperature control. The fresh water circuit is a pressurized system using a stationary/marine type 3-way thermostatic control valve for temperature control. The fresh water circuit is a vented system using a stationary/marine type 3-way thermostatic control valve for temperature control. The fresh water circuit is a vented system using an automotive type 2-way thermostatic control valve for temperature control. New Motor Plants Questions 2018
A The diesel generators on the fishing industry seiner to which you are assigned are fitted with a charge air system as shown in the illustration. What statement is true concerning this type of charge air system? Illustration MP-CA-10 The scavenging blower is a positive displacement type, and the actual displacement is directly proportional to engine speed. The scavenging blower is a non-positive displacement type, and the actual displacement is directly proportional to engine speed. The scavenging blower is a positive displacement type, and the actual displacement is not directly proportional to engine speed. The scavenging blower is a non-positive displacement type, and the actual displacement is not directly proportional to engine speed. New Motor Plants Questions 2018
A The fishing industry factory ship to which you are assigned is fitted with main propulsion engines driving through pneumatic air flex clutches as shown in the illustration. What statement is true concerning this type of clutch? Illustration MP-DS-11 The clutch is a constricting type clutch and constricts to engage against the clutch drum when inflated. The clutch is an expanding type clutch and expands to engage against the clutch drum when inflated. The clutch is a constricting type clutch and constricts to engage against the clutch gland when inflated. The clutch is an expanding type clutch and expands to engage against the clutch gland when inflated. New Motor Plants Questions 2018
C The mollusc dredger to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What statement is true concerning transfer of control? Illustration MP-IC-12 The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the mechanical slave remote control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the engine room control station or vice versa. The transfer valve at the engine room control station is used to transfer control of propulsion from the engine room control station to the pilot house pneumatic master control station or vice versa. The transfer valve at the pneumatic remote control station is used to transfer control of propulsion from the pneumatic remote control station to the mechanical slave remote control station or vice versa. New Motor Plants Questions 2018
A The fishing industry factory ship to which you are assigned has a pneumatic propulsion control system as shown in the illustration. Which control valve is responsible for bypassing the inflation delay orifice to insure rapid and positive reversals and to protect the clutches from excessive slip? Illustration MP-IC-08 H5 boost relay air valve C2 speed-slip relay valve H5 governor limit relay air valve H5 inflation air relay valve New Motor Plants Questions 2018
C The main engines on your uninspected fishing trawler are equipped with over speed trip devices as shown in the illustration. What statement concerning the operation of the over speed trip is true? Illustration MP-IC-15 The over speed trip senses oil pressure proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The over speed trip senses centrifugal force proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. The over speed trip senses centrifugal force proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The over speed trip senses oil pressure proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. New Motor Plants Questions 2018
D The main engines on your fishing industry factory ship are fitted with speed control governors of the type shown in the illustration. If the shutdown solenoid is de-energized during normal operation, which of the following scenarios depicts the response on a safety shutdown where the shutdown plunger rod moves downward unseating the ball check valve when the shutdown solenoid energizes? Illustration MP-IC-14 The servo piston rod moves downward. The power cylinder tail rod moves upward. The servo piston rod moves upward. The power cylinder tail rod moves upward. The servo piston rod moves downward. The power cylinder tail rod moves downward. The servo piston rod moves upward. The power cylinder tail rod moves downward. New Motor Plants Questions 2018
C The diesel generators on your uninspected fishing trawler are fitted with speed control governors of the type shown in the illustration. If an adjustment is made to item #2, what will change? Illustration MP-GV-28 The maximum high-speed setting. The minimum low speed setting. The governed speed setting. The speed droop setting. New Motor Plants Questions 2018
A An engine that runs rough may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your fishery research vessel have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high pressure fuel injection line fitting at the injector nozzle while the the engine is running and noting the engine response. Which of the following statements is true? After disabling the injector of a given cylinder, if the previously rough-running engine continues to run equally roughly with no change, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the previously rough-running engine runs even rougher with considerable change, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the previously rough-running engine now runs smoothly, this indicates that the cylinder associated with the disabled injector is misfiring. After disabling the injector of a given cylinder, if the previously smooth-running engine runs rough with considerable change, this indicates that the cylinder associated with the disabled injector is misfiring. New Motor Plants Questions 2018
D The main propulsion diesel engines fitted on your uninspected fishing industry vessel are started with vane-type air-starting motors. What statement concerning air-start motor lubricator maintenance is true? (Assume a metal bowl fitted with a tubular sight glass.) The lubricator reservoir bowl should be re-filled with clean oil when the level is no longer visible in the glass. The lubricator reservoir bowl should be re-filled with clean oil as soon as the level drops to the upper part of the glass. The lubricator reservoir bowl should be re-filled with clean oil when it is estimated that the bowl is completely empty. The lubricator reservoir bowl should be re-filled with clean oil when it becomes approximately half-full as shown in the glass. New Motor Plants Questions 2018
B An auxiliary diesel engine on your fishing trawler uses a starting system similar to the one shown in the illustration. The hand pump is capable of charging the accumulator to the pressure necessary to start the engine and the engine successfully starts. While running, the engine driven pump is not capable of maintaining the accumulator in a state of being fully charged. Which of the following is most likely to be the cause? Illustration MO-0049 The unloading valve (I) is set for too high a pressure. The engine driven pump (H) drive belt is broken. The full-flow filter (G) is bypassing the element. The hydro starter (C) pistons are worn. New Motor Plants Questions 2018
A A diesel generator set on your fishing industry factory ship has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the inlet pressure is increasing and the outlet pressure is decreasing, resulting in an unacceptable pressure drop. What should be done? Illustration MO-0057 While the engine is running, the cleaning handle (A) should be rotated one or more full turns to remove the accumulated dirt from the disk stack (C). While the engine is running, the cleaning handle (A) should be rotated one-half turn to remove the accumulated dirt from the disk stack (C). The drain plug (B) is removed to drain the sludge from the strainer sump, but the engine must be stopped to perform this operation. While the engine is running, the drain plug (B) should be carefully loosened to drain the sludge from the strainer sump. New Motor Plants Questions 2018
B A diesel generator set on your fishing trawler has a simplex lube oil strainer of the type shown in the illustration, situated on the discharge side of the lube oil pump. At a specified engine rpm and lube oil temperature, you notice that the pressure drop becomes unacceptably high. When you rotate the cleaning handle, you notice that it is extremely difficult to rotate. What should be done? Illustration MO-0057 After stopping the engine, the drain plug (B) should be removed to drain the accumulated sludge from the strainer sump. After stopping the engine, the strainer element should be withdrawn and soaked in solvent to break up the heavy deposits on the disk stack (C). The cleaning handle (A) should be forced to rotate, even if it requires an extender handle to produce greater rotating torque. No special consideration need be taken as long as the cleaning handle (A) rotates, even if it rotates with great difficulty. New Motor Plants Questions 2018
A When interpreting the engine lube oil supply header pressures for the main engines on your fishing trawler, what statement is true assuming that the lube oil pump is engine-driven? As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to increase. As the lube oil temperature increases, the supply header pressure tends to decrease, and as the engine rpm increases, the supply header pressure tends to decrease. As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to decrease. As the lube oil temperature increases, the supply header pressure tends to increase, and as the engine rpm increases, the supply header pressure tends to increase. New Motor Plants Questions 2018
C The main engines on the fishing factory ship to which you are assigned are fitted with duplex secondary spin-on fuel filters. Concerning the selector handle, what statement is true? The selector handle is placed in the "BOTH" position when the engine is running at low load or rpm. When the engine is running at high load or rpm, the selector handle is placed in either the "1" or the 2" position depending upon which filter element is clean. The selector handle is placed in the "BOTH" position when the engine is running at high load or rpm to accommodate higher fuel delivery requirements. When the engine is running at low load or rpm, the selector handle is placed in either the "1" or the 2" position. The selector handle is placed in either position the "1" or "2" position regardless of the load or rpm on the engine. The selector handle is temporarily placed in the "BOTH" position only when transitioning from a restricted filter element over to a clean filter element. The selector handle is normally placed in the "BOTH" position regardless of the load or rpm on the engine in order to be able to double the fuel handling throughput at any load or rpm and allow the engine speed to be changed without worrying about the selector handle position. New Motor Plants Questions 2018
B Which fishing vessel diesel fuel oil day tank condition would be most likely to result in water contaminated fuel? Maintaining relatively low day tank levels when the relative humidity of the atmosphere is low. Maintaining relatively low day tank levels when the relative humidity of the atmosphere is high. Maintaining relatively high day tank levels when the relative humidity of the atmosphere is low. Maintaining relatively high day tank levels when the relative humidity of the atmosphere is high. New Motor Plants Questions 2018
C The uninspected fishing vessel to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A, which plunger travel position corresponds to when fuel injection ends? Illustration MP-FI-12 1 2 3 4 New Motor Plants Questions 2018
B The mollusc dredger to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A, which plunger travel position corresponds to when fuel injection begins? Illustration MP-FI-12 1 2 3 4 New Motor Plants Questions 2018
C The fishery research vessel to which you are assigned has diesel generators fitted with fuel injectors of the type shown in figure "2" of the illustration. What statement is true concerning this type of injector? Illustration MP-FI-20 The injector is of the closed type and features pressure-time metering. The injector is of the open type and features pressure-time metering. The injector is of the closed type and features port and helix metering. The injector is of the open type and features port and helix metering. New Motor Plants Questions 2018
C The main propulsion diesel engines on your uninspected fishing industry vessel are fitted with mechanically operated and controlled unit injectors. In order for the engine to run properly, the injectors must be properly timed relative to the camshaft and properly synchronized relative to the other injectors. In terms of timing and synchronization, what statement is true? Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the control racks of the injectors to the proper setting. Injector timing is achieved by adjusting the control racks of the injectors to the proper setting, but injector synchronization is achieved by adjusting the cam follower heights of the injectors to the proper setting. Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, but injector synchronization is achieved by adjusting the control racks of the injectors to the proper setting. Injector timing is achieved by adjusting the cam follower heights of the injectors to the proper setting, and injector synchronization is also achieved by adjusting the cam follower heights of the injectors to the proper setting. New Motor Plants Questions 2018
B The diesel generator set drive engines on your fishing factory ship are protected with heavy-duty oil bath air cleaners. The oil within these air cleaners should be periodically replaced in accordance with manufacturer recommendations. What statement best describes when it would be appropriate to deviate from the recommended frequency? Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. New Motor Plants Questions 2018
B The diesel engines on your fishing factory ship are all protected with dry-type air filters. When changing filter elements what visual indication would cause you to suspect that the engine has been contaminated with dust as the result of improperly sealing of the filter element gasket? The "clean" side of the air filter element is clean and free of dust. The "clean" side of the air filter element is streaked with dust. The "dirty" side of the air filter housing is coated with dust. The "dirty" side of the air filter element is coated with dust. New Motor Plants Questions 2018
B A main propulsion diesel engine on your fishing trawler produces gray to black smoke under virtually all load conditions as observed at the stack. The heavier the load on the engine, the darker the smoke becomes. What condition would most likely account for this? Leaking exhaust manifold cooling water jackets. Excessively restricted exhaust silencer/muffler. Excessively worn exhaust valve guides. Leaking exhaust piping expansion joints. New Motor Plants Questions 2018
A Your fishing factory ship is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. Which heat exchanger/cooler application and aspect would most likely require periodic mechanical cleaning with a specially designed brush? Illustration MP-CW-15 The inside of the tubes of the RW/FW heat exchanger. The outside of the tubes of the RW/FW heat exchanger. The inside of the tubes of the lube oil cooler. The outside of the tubes of the lube oil cooler. New Motor Plants Questions 2018
D The fresh water cooling systems serving the main engines on your fishery research vessel are arranged as shown in the illustration. If the fresh water thermostatic control valve fails in the position where 100% of the flow from flange "A" is permanently ported to flange "C" and flange "B" is permanently blocked, while starting and warming the engine with no load, what would be the resulting warm up time period? Illustration MP-CW-15 With no load, it is not possible to describe the time frame required to warm up the engine. With no load, the engine would require a much shorter than normal time frame to warm up. With no load, the engine would require a relatively normal time frame to warm up. With no load, the engine would require a much longer than normal time frame to warm up. New Motor Plants Questions 2018
B The fresh water cooling systems serving the main engines on your fishing factory ship are arranged as shown in the illustration. If the coolant drain valves are inadvertently opened during engine operation, what combination set of symptoms would most likely result? Illustration MP-CW-16 Low level in the jacket water expansion tank. High fresh water outlet temperature from the engine. High fresh water pump(s) discharge pressure. Low level in the jacket water expansion tank. High fresh water outlet temperature from the engine. Low fresh water pump(s) discharge pressure. Low level in the jacket water expansion tank. Low fresh water outlet temperature from the engine. Low fresh water pump(s) discharge pressure. High level in the jacket water expansion tank. High fresh water outlet temperature from the engine. High fresh water pump(s) discharge pressure. New Motor Plants Questions 2018
A The turbochargers on the main propulsion engines on the fishing factory ship to which you are assigned are fitted with an exhaust inlet screen to protect the turbocharger turbine. Upon inspection, pieces of broken piston rings or exhaust valves are found in the foreign object trap box. Why is it essential that this debris be removed prior to placing the engine back into operation? The debris may eventually break into smaller pieces allowing turbine foreign object damage. The debris will eventually become difficult to remove from the trap box. The debris may eventually cause the screen to become severely restricted. The debris will cause the turbine casing to become statically imbalanced. New Motor Plants Questions 2018
C The fishing trawler to which you are assigned is fitted with hydraulic clutches similar to that shown in the illustration. If the time required for the clutch to disengage is unacceptably long, which of the following conditions would most likely be responsible for this? Illustration MO-0089 Fluid clutch sump level maintained at too high a level. Clutch operating fluid is maintained at too high a temperature. Solid contaminants are present in the hydraulic fluid. Clutch operating fluid is maintained at too low a temperature. New Motor Plants Questions 2018
D The pneumatic propulsion control system used on your uninspected fishing industry vessel is configured as shown in the illustration. In terms of clutch air system maintenance, what statement best represents operational requirements? Illustration MP-IC-12 Whereas the clutch air pressure is critical, the dryness and cleanliness of the clutch air are of secondary concern. Whereas the cleanliness of clutch air is critical, the dryness and pressure are clutch air are of secondary concern. Whereas the dryness of clutch air is critical, the pressure and cleanliness of the clutch air are of secondary concern. The pressure, dryness, and cleanliness of clutch air are all critical to successful pneumatic propulsion control operations. New Motor Plants Questions 2018
B The uninspected fishing industry vessel to which you are assigned is fitted with a pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MP-IC-12 The pilot house/remote transfer valve at the pilot house has a blocked remote port. The local/remote transfer valve at the engine room control station has a blocked remote port. The attendance valve at the pneumatic remote control station has a blocked outlet port. The local/remote transfer valve at the engine room control station has a blocked local port. New Motor Plants Questions 2018
D The main engines on your fishing trawler are protected with a low crankcase oil level detector protective device designed to provide an alarm when the main sump oil level drops below a certain level. It is malfunctioning, and upon investigation, you determine from the technical manual that the oil level detector is a sealed unit. What statement best represents the best strategy to remedy this situation? The oil level detector is adjusted just as if it was an unsealed unit, without regard to any seals associated with the unit. The oil level detector is adjusted just as if it was an unsealed unit, but the seals must be re- established before placing the unit back into operation. The oil level detector seals must be broken before adjustments can be made, as long as new seals are established before placing the unit back into operation. The oil level detector must be replaced with a new detector if it is found to be defective, since field adjustments are not possible on this type of unit. New Motor Plants Questions 2018
C A main propulsion diesel engine on your fishing factory ship has experienced a safety shutdown on high crankcase pressure that was accompanied by an alarm. After waiting 2 hours as recommended by the manufacturer, the crankcase is opened up and suitable repairs are accomplished. After re- closing the crankcase, the engine fails to start. Which of the following would account for this? The high crankcase pressure detector protective device must have its diaphragm replaced first before the engine can be restarted. The high crankcase pressure detector protective device's pressure chamber must be evacuated with a vacuum pump first before the engine can be restarted. The high crankcase pressure detector protective device must be reset first before the engine can be restarted. The high crankcase pressure detector protective device must have its switch lever replaced first before the engine can be restarted. New Motor Plants Questions 2018
B A main engine on your fishing trawler has experienced a low coolant water level alarm even though the water level in the expansion tank is normal. Assuming that the float activated switch is designed to open at low coolant level to activate the alarm, which of the following would account for this? The float level switch contacts are welded closed, not permitting the contacts to open. The float switch wire connections are loose at the terminals, not permitting continuity through the switch. The float is binding in the float chamber, not permitting the float to drop. It is not possible for a low coolant level alarm to occur when the water level is normal. New Motor Plants Questions 2018
D Using the oil chart provided in the illustration for guidance, which synthetic oil would be capable of providing adequate lubrication of the main engine speed control governor on your uninspected fishing industry vessel, if the governor oil operating temperature shall be in the ideal operating range of 130F to 205F? Illustration MP-GV-35 Mobil 1 (Synthesized Hydrocarbon). DN600 (Hydrocarbon). Amsoil 10W40 (Diester). All Proof 10W50 (Polyester). New Motor Plants Questions 2018
C The diesel generator on service on your fishing factory ship is undergoing cyclic, rhythmic variations in speed at steady load. When the governor output shaft is disconnected from the fuel control linkage and the linkage is blocked manually, these variations in engine speed stop. What would be an appropriate corrective action? Tighten the bolts securing the governor base to the engine. Replace the fuel injector nozzle of the misfiring cylinder. Make an adjustment at the compensating needle valve. Replace the governor drive gears. New Motor Plants Questions 2018
D While warming up the main engines on your uninspected fishing trawler while tied up at your own pier, one of the main engines suddenly sounds the low lube oil pressure alarm. What is the appropriate initial response? Immediately add make-up oil or service lube oil coolers, strainers, and filters, as appropriate. Monitor closely oil pressures, temperatures, and levels while continuing to run the engine. Reduce the load and speed on the engine and continue to monitor the oil pressure. Immediately shutdown the engine, then investigate the cause for the low-pressure alarm. New Motor Plants Questions 2018
C The fishery research vessel to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the attached fuel oil pump and the hand priming fuel oil pump from discharging through the other, what other purpose do the anti-flood check valves serve? Illustration MP-FO-06 They prevent backflow of fuel from the engine to the day tank when the engine is shutdown and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shutdown and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located above the engine. New Motor Plants Questions 2018
D The fresh water cooling systems serving the main engines on your fishery research vessel are arranged as shown in the illustration. If the fresh water thermostatic control valve fails in the position where 100% of the flow from flange "A" is permanently ported to flange "C" and flange "B" is permanently blocked, while starting and warming the engine with no load, what would be the resulting warm up time? Illustration MP-CW-15 With no load, it is not possible to describe the time frame required to warm up the engine. With no load, the engine would require a much shorter than normal time frame to warm up. With no load, the engine would require a relatively normal time frame to warm up. With no load, the engine would require a much longer than normal time frame to warm up. New Motor Plants Questions 2018
A The lubricating oil system supporting the main propulsion reduction gear on the fishing trawler to which you are assigned is fitted with a sea water-cooled 4-pass shell and tube lube oil cooler. The water box sacrificial zinc anodes must be inspected periodically. Which of the following listed actions correctly states maintenance criteria pertaining to scale build-up on the zincs? Any accumulated scale build-up on sacrificial zinc anodes should be scraped off until the zinc anodes are shiny. Any accumulated scale build-up on sacrificial zinc anodes should be left intact to ensure proper protection from galvanic corrosion. Any sacrificial zinc anodes with accumulated scale build-up should be replaced regardless of the degree of deterioration. There is no need to check for scale build-up on the sacrificial zinc anodes, as this phenomenon is not physically possible. New Motor Plants Questions 2018
C The closed, recirculating system coolant in the main engines used on your fishing industry factory ship consists of heavy-duty antifreeze and supplemental coolant additive. The coolant has been tested and the antifreeze, molybdate, and nitrite concentrations are all within acceptable limits and the pH is also within acceptable limits. According to the test-strip comparison chart shown in the illustration, which set of indications corresponds with this? Illustration MP-WC-12 Antifreeze concentration color indication: 30% Molybdate concentration color indication: row 1 Nitrite concentration color indication: column B pH color indication: 8 Antifreeze concentration color indication: 60% Molybdate concentration color indication: row 4 Nitrite concentration color indication: column H pH color indication: 10 Antifreeze concentration color indication: 50% Molybdate concentration color indication: row 3 Nitrite concentration color indication: column E pH color indication: 9 Antifreeze concentration color indication: 50% Molybdate concentration color indication: row 3 Nitrite concentration color indication: column D pH color indication: 6 New Motor Plants Questions 2018
C After performing repairs on the fuel injection system or governor of a main propulsion diesel engine on your fishing industry factory ship, what precaution should be taken prior to starting the engine? Provisions should be made to shut off the engine's starting air supply to stop the engine in case there is an over speed on start-up. Provisions should be made to shut off the engine's lubricating oil supply to stop the engine in case there is an over speed on start-up. Provisions should be made to shut off the engine's inlet air and/or fuel supply to stop the engine in case there is an over speed on start-up. Provisions should be made to shut off the engine's control electrical power supply to stop the engine in case there is an over speed on start-up. New Motor Plants Questions 2018
C The main engines on your fishing industry factory ship are fitted with speed control governors of the type shown in the illustration. What is the purpose of the compensation system, consisting of the buffer cylinder, buffer piston, buffer springs, and compensation needle valve? Illustration MP-GV-14 It limits engine speed to a maximum value to prevent over speeding. It senses the engine speed setting delivered from the bridge. It prevents engine hunting when responding to load changes. It senses the actual engine speed of rotation. New Motor Plants Questions 2018
D Using the oil chart provided in the illustration for guidance, which synthetic oil would be capable of providing adequate lubrication of the main engine speed control governor on your uninspected fishing industry vessel, if the governor oil operating temperature shall be in the ideal operating range of 130F to 205F? Illustration MP-GV-35 Mobil 1 (Synthesized Hydrocarbon). DN600 (Hydrocarbon). Amsoil 10W40 (Diester). All Proof 10W50 (Polyester). New Motor Plants Questions 2018
D The steam generating plant on your fishing industry factory ship is of the type shown in the illustration. Which of the labeled components would be the steam separator? Illustration MP-SP-20 1 2 3 5 New Motor Plants Questions 2018
A In a diesel engine, which type of wrist is fixed to the small end of the connecting rod and moves in the piston? Semi-floating Full floating Solid Fixed New Motor Plants Questions 2018
C The vessel to which you are assigned is fitted with a 4-stroke cycle, 6-cylinder in-line diesel generator sets. Using the chart shown in the illustration, what is the firing order of the engines? Illustration MP-HS-05 1-2-3-4-5-6 1-4-2-6-3-5 1-5-3-6-2-4 Not enough information is provided to determine the firing order. New Motor Plants Questions 2018
C The unit of measure expressed as centistokes (cSt) is a measure of what fuel property? Heating value Cetane rating Viscosity Density New Motor Plants Questions 2018
A The vessel to which you are assigned is fitted with auxiliary engines as shown in the illustration. What statement is true concerning the valve guide and valve seat arrangements? Illustration MP- HS-03 The valve guides and the valve seats are both replaceable inserts. The valve guides and the valve seats are both integral (non-replaceable). The valve guides are integral (non-replaceable), and the valve seats are replaceable inserts. The valve guides are replaceable inserts, and the valve seats are integral (non-replaceable). New Motor Plants Questions 2018
C The vessel to which you are assigned is fitted with a diesel driven generator engine as shown in the illustration. What statement is true in terms of the combustion chamber design? Illustration MP-HS- 04 The engine uses turbulence chambers with a hemispherical fire-deck. The engine uses an open type combustion chamber with a hemispherical fire-deck. The engine uses an open type combustion chamber with a flat fire-deck. The engine uses pre-combustion chambers with a flat fire-deck. New Motor Plants Questions 2018
D When starting an auxiliary diesel engine in preparation for operation, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Fuel oil supply header pressure. Cylinder jacket water pump discharge pressure. Winch gear oil pump discharge pressure. Engine lubricating oil supply header pressure. New Motor Plants Questions 2018
D The diesel generator set drive engines on your vessel are protected with heavy-duty oil bath air cleaners. The oil within these air cleaners should be periodically replaced in accordance with manufacturer recommendations. What statement best describes when it would be appropriate to deviate from the recommended frequency? Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. New Motor Plants Questions 2018
D The turbocharged, four-stroke, diesel generator set drive engines on your vessel are protected with dry-type air intake filters. The filter element condition can be evaluated by attaching a water manometer to measure the vacuum in the air duct between the air intake filter and the turbocharger blower inlet. Assume that the manometer reads 10" of water column (negative) at rated engine rpm under full load with a clean, properly sealing filter element. What would a reading of 20" of water column (negative) indicate at rated engine rpm under full load? The filter element is slightly restricted with dust but does not yet require replacement. The filter element is being severely bypassed due to an improper seal and should be immediately re-seated. The filter element is being slightly bypassed due to an improper seal and can be ignored until time is available for re-seating. The filter element is severely restricted with dust and requires immediate replacement. New Motor Plants Questions 2018
C The turbocharged, four-stroke, diesel engines on your vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators? The engine should be running at idle RPM with no load (propulsion clutch disengaged). The engine should be running at rated RPM with no load (propulsion clutch disengaged). The engine should be running at rated RPM with full load (propulsion clutch engaged). The engine should be running at idle RPM with minimal load (propulsion clutch engaged). New Motor Plants Questions 2018
C The vessel to which you are assigned has a main engine fuel system as shown in the illustration. When the filter and water separator as shown in the day tank fill line are combined into one unit, what is this called? Illustration MP-FO-06 A strainer. An absorption type filter. A coalescing type filter. An adsorption type filter. New Motor Plants Questions 2018
A The vessel to which you are assigned has diesel generators fitted with fuel systems as shown in the illustration. What statement is true concerning items "11", "13", and "15"? Illustration MP-FO-17 Item "11" is a high pressure fuel line. Item "13" is the common injector leak off line. Item "15" is the injection pump return line. Item "11" is a high pressure fuel line. Item "13" is the common rail supply line. Item "15" is the injection pump return line. Item "11" is a low pressure fuel line. Item "13" is the common injector leak off line. Item "15" is the injection pump return line. Item "11" is a high pressure fuel line. Item "13" is the common injector leak off line. Item "15" is the injection pump supply line. New Motor Plants Questions 2018
A The diesel generator on service on your anchor-handling supply vessel is undergoing cyclic, rhythmic variations in speed at steady load. When the governor output shaft is disconnected from the fuel control linkage and the linkage is blocked manually, these variations in engine speed stop. What would be an appropriate corrective action? Make an adjustment at the compensating needle valve. Replace the governor drive gears. Replace the fuel injector nozzle of the misfiring cylinder. Tighten the bolts securing the governor base to the engine. New Motor Plants Questions 2019
A The lubricating oil system supporting the main propulsion reduction gear on your articulated tug- barge unit is fitted with a lube oil strainer as shown in the illustration. Assuming coast-wise voyages where the engine-room is periodically unmanned, how often should the handle "A" be rotated for cleaning purposes? Illustration MO-0057 Once per day while underway. Once per month. Once every six months. Once per year. New Motor Plants Questions 2019
B The diesel generators on the platform supply vessel to which you are assigned are fitted with a charge air system as shown in the illustration. What statement is true concerning this type of charge air system? Illustration MO-0134 The scavenging blower is a non-positive displacement type, and the actual displacement is directly proportional to engine speed. The scavenging blower is a positive displacement type, and the actual displacement is directly proportional to engine speed. The scavenging blower is a positive displacement type, and the actual displacement is not directly proportional to engine speed. The scavenging blower is a non-positive displacement type, and the actual displacement is not directly proportional to engine speed. New Motor Plants Questions 2019
B You suspect that a diesel generator set on your general purpose offshore supply vessel has a defective unit injector because the engine, although warm, is running roughly. The two-stroke engine is fitted with mechanically operated unit injectors. When you push and hold down the #3 cylinder injector follower, there is no real change, as the engine continues to run roughly as before. What does this indicate? The #3 cylinder unit injector is functioning properly. One of the other cylinder unit injectors must be faulty. The #3 cylinder unit injector is faulty. You have successfully isolated the faulty unit injector. Either the #4, #5, or #6 cylinder unit injector is faulty. The #1 and #2 cylinder unit injectors are functioning properly. Either the #1 or #2 cylinder unit injector is faulty. The #4, #5 and #6 cylinder unit injectors are functioning properly. New Motor Plants Questions 2019
A You are on a salvage tug using main propulsion engines of the type shown in the illustration. Assuming that the piston is properly positioned, what statement represents the procedure for inspection of the compression rings while in place inside the engine? Illustration MO-0227 The inspection takes place by removing the appropriate air box hand hole cover and viewing through the resulting opening. The inspection takes place by removing the appropriate cylinder head valve cover and viewing through the resulting opening. The inspection takes place by removing the appropriate oil pan cover and viewing through the resulting opening. It is not possible to inspect the compression rings while in place inside the engine. New Motor Plants Questions 2019
C You are assigned to an anchor handling supply vessel with a propulsion system as shown in figure "B" of the illustration. What type of propulsion system is illustrated? Illustration MO-0215 Controllable pitch propeller Voith-Schneider drive Schottel-azimuthing drive (z-drive) Conventional fixed pitch propeller New Motor Plants Questions 2019
D You are assigned as an engineer on an anchor handling vessel using main propulsion engines of the type shown in the illustration. Fortunately, with engines of this type, it is possible to inspect the compression rings while in place inside the engine. What would be the indication of properly functioning rings? Illustration MO-0224 The rings should NOT be free to move within their grooves and their faces should be bright and shiny. The rings should be free to move within their grooves, and their faces should be blackened with carbon. The rings should be free to move within their grooves, and their faces should have vertical brown streaks. The rings should be free to move within their grooves and their faces should be bright and shiny. New Motor Plants Questions 2019
A While preparing an engine for departure, the engineer notices water coming from both the waste heat boiler and turbocharger drains. Which of the following could be the cause? Leak in a waste heat boiler tube. Leak from a cylinder exhaust valve cage. Leak in a turbocharger exhaust casing. Leak from a turbocharger inlet casing. New Motor Plants Questions 2019
C Which segment of the two-stroke cycle engine diagram shown in the illustration represents 'supercharging'? Illustration MO-0037 I II III IV New Motor Plants Questions 2019
D Which of the following conditions best describes the reason for performing a bottom blow on an auxiliary steam boiler as fitted on your vessel? High water. Excess chemicals and/or salinity. Priming and carryover. Sludge removal. New Motor Plants Questions 2019
A Which of the following closed, re-circulating cooling water system problems associated with marine diesel engines is defined as an electro-chemical process by which a metal (such as iron) returns to its natural oxide state? Corrosion Scaling Fouling Erosion New Motor Plants Questions 2019
D When rolling over a main engine on your vessel prior to starting with the cylinder test valves open to expel any fluids accumulated within the cylinders, a rather large amount of water is discharged. What is the appropriate response? Start the engine, but run the engine with the cylinder test valves cracked slightly open. Start the engine, but monitor all fluid levels very closely, especially that of the jacket water. Start the engine, but maintain the jacket water expansion tank level higher than normal. Do not allow the engine to be started until the cause of the water discharge has been determined and corrected. New Motor Plants Questions 2019
B When preparing an engine for sea, the engineer notices water coming from both the turbo-charger exhaust casing drain and one cylinder indicator valve. Which of the following could be the possible cause? Leak in a turbo-charger inlet air casing. Leak in a turbo-charger exhaust gas casing. Leak in the cylinder start air valve cage. Leak in the cylinder exhaust valve cage. New Motor Plants Questions 2019
A When cleaning burner atomizers associated with an oil-fired auxiliary boiler, which of the following metals would be recommended to use in fabricating a tool for the purposes of carbon removal? Copper Tungsten Titanium Chrome-moly steel New Motor Plants Questions 2019
A When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your towing vessel while underway on a coast-wise voyage, what should be the expansion tank level? The level should be in the upper part of the sight glass when the engine is at operating temperature. The level should be in the lower part of the sight glass when the engine is at operating temperature. The level should be out of sight high in the sight glass when the engine is at operating temperature. The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature. New Motor Plants Questions 2019
A When checking the crankcase oil level on an off-line diesel generator set engine on your offshore oil spill response vessel, what should be the oil level as indicated on the dipstick? The level should be between the FULL and ADD marks on the dipstick. The actual level is unimportant as long as it is visible on the dipstick. The level should be below the ADD mark on the dipstick. The level should be well above the FULL mark on the dipstick. New Motor Plants Questions 2019
C When checking the crankcase oil level on a main propulsion engine on your offshore oil spill response vessel while underway, what should be the oil level as indicated on the dipstick? The actual level is unimportant as long as it is visible on the dipstick when the engine is running. The level should be well above the FULL mark on the side of the dipstick marked with engine IDLE and oil HOT. The level should be between the FULL and ADD marks on the side of the dipstick marked with engine IDLE and oil HOT. The level should be below the ADD mark on the side of the dipstick marked with engine IDLE and oil HOT. New Motor Plants Questions 2019
A What would be the most practical and efficient way of removing soot deposits from the fire-sides of the tubes of an auxiliary water-tube natural-circulation boiler as fitted on your platform supply vessel? Use of an air lance. Use of a suitable acid. Use of a high-pressure water jet. Use of a power driven wire brush. New Motor Plants Questions 2019
C What statement is true concerning the primary purpose of an exhaust muffler/silencer fitted on the exhaust system for any diesel engine so equipped? Minimize sound attenuation while maximizing exhaust system back pressure. Minimize sound attenuation while minimizing exhaust system back pressure. Maximize sound attenuation while minimizing exhaust system back pressure. Maximize sound attenuation while maximizing exhaust system back pressure. New Motor Plants Questions 2019
D What may cause a diesel engine cylinder head to crack? a leaking oil control ring heat transfer from exhaust valves overheated intake valves scale on cooling passages New Motor Plants Questions 2019
D What is the purpose of the mixing tank shown in the illustration? Illustration MO-0058 To enable the changeover from hot heavy fuel to cold distillate fuel to occur gradually To prevent overheating of the day tank To permit vaporized lighter fuel fractions to vent All of the above. New Motor Plants Questions 2019
D What effect does nitrogen, as a volumetric component of a diesel engine's cylinder air charge, have on the ignition and combustion? Nitrogen impedes fuel penetration. Nitrogen advances fuel ignition. Nitrogen retards fuel ignition. Nitrogen has no effect on ignition and combustion. New Motor Plants Questions 2019
C What actions should you take if the separator shown in the illustration trips due to excessive vibration? Illustration MO-0127 Open the bowl with shooting water to release all liquid. Stop the separator. Determine the cause of vibration and rectify. Reset the vibration switch. Restart separator. Stop the separator. Reset the vibration switch. Adjust down the setpoint of the vibration switch. Restart separator. Stop the separator and keep the bowl filled with liquid during rundown. Determine the cause of the vibration and rectify. Reset the vibration switch. Restart separator. Separators do not have vibration switches fitted due to other vibrations in engine room. New Motor Plants Questions 2019
C Wet-type exhaust silencers, that are used with some lifeboat diesel engines, utilize which design feature? The silencer is equipped with a water seal. The exhaust gases are preheated in the silencer to reduce noise. A cooling water spray and internal baffles break up the exhaust gas flow. The exhaust temperature always increases when passing through the silencer. New Motor Plants Questions 2019
C The vessel to which you are assigned is fitted with generator engines as shown in the illustration. What statement is true concerning the cylinders? Illustration MO-0163 The cylinder walls are integral (non-replaceable) to the cylinder block. The cylinder liners are of the jacketed type and are replaceable inserts. The cylinder liners are of the wet type and are replaceable inserts. The cylinder liners are of the dry type and are replaceable inserts. New Motor Plants Questions 2019
B The vessel to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In terms of operating cycle and cylinder configuration, what statement is true? Illustration MO-0163 This is a two-stroke cycle, 60 V-type engine. This is a four-stroke cycle, 90 V-type engine. This is a two-stroke cycle, 90 V-type engine. This is a four-stroke cycle, 60 V-type engine. New Motor Plants Questions 2019
A The vessel to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. Assume that the vacuum between the air filter and the turbocharger blower inlet is 12" of water column (negative with respect to atmospheric pressure) when the engine is running at 50% of maximum, continuous rated load. What will happen to the suction vacuum when the load is increased to 100% of maximum continuous rated load? Illustration MO-0076 The depth of vacuum will increase (reading more inches of water column negative with respect to atmospheric pressure). The depth of vacuum will decrease (reading less inches of water column negative with respect to atmospheric pressure). No change in the depth of vacuum will occur (reading the same inches of water column negative with respect to atmospheric pressure). A loss of vacuum will occur (now reading inches of water column positive with respect to atmospheric pressure). New Motor Plants Questions 2019
B The turbochargers on the main propulsion engines on the tug to which you are assigned are fitted with an exhaust inlet screen to protect the turbocharger turbine. Upon inspection, pieces of broken piston rings or exhaust valves are found in the foreign object trap box. Besides removing this debris, with respect to the screen what should be done? The screen should be replaced without conducting any further checking or investigation. The screen should be magnafluxed to check for damage not visible to the naked eye. The screen should be placed in a press to remove any indentations from impingement. The screen should be replaced only when damage is obvious to the naked eye. New Motor Plants Questions 2019
C The salvage tug to which you are assigned is fitted with generator set drive engines as shown in the illustration. What statement is true in terms of the combustion chamber design? Illustration MO-0006 The engine uses an open type combustion chamber with a hemispherical fire-deck. The engine uses turbulence chambers with a hemispherical fire-deck. The engine uses an open type combustion chamber with a flat fire-deck. The engine uses pre-combustion chambers with a flat fire-deck. New Motor Plants Questions 2019
D The river pushboat to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What statement is true concerning transfer of control? Illustration MO-0168 The transfer valve at the pneumatic remote control station is used to transfer control of propulsion from the pneumatic remote control station to the mechanical slave remote control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the mechanical slave remote control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the engine room control station or vice versa. The transfer valve at the engine room control station is used to transfer control of propulsion from the engine room control station to the pilot house pneumatic master control station or vice versa. New Motor Plants Questions 2019
A The pneumatic propulsion control system used on your oil platform supply vessel uses a diaphragm- operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for lubrication upon reassembly? Illustration MO-0052 O-rings should be lubricated with a silicone-based grease. O-rings should be lubricated with penetrating oil. O-rings should be lubricated with desiccant powder. O-rings should not be lubricated by any means. New Motor Plants Questions 2019
D The OSV to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. All propulsion controls function properly from all locations with the exception of the pneumatic remote control station. Here the propulsion engine will run only at idle and neither propulsion clutch will engage regardless of the throttle lever control position. Which of the following system faults best accounts for these symptoms? Illustration MO-0168 The local/remote transfer valve at the engine room control station has a blocked remote port. The attendance valve at the pilot house pneumatic master control station has a blocked outlet port. The throttle lever control at the pneumatic remote control station has a blocked speed signal pilot air port. The pilot house/remote transfer valve at the pilot house pneumatic master control station has a blocked remote port. New Motor Plants Questions 2019
B The oil spill response vessel to which you are assigned has diesel generators fitted with multi- plunger pumps with the metering principle as shown in the illustration. What statement is true concerning this injection pump type? Illustration MO-0145 As the load changes, the beginning of injection is variable, and the ending of injection is variable. As the load changes, the beginning of injection is constant, and the ending of injection is variable. As the load changes, the beginning of injection is variable, and the ending of injection is constant. As the load changes, the beginning of injection is constant, and the ending of injection is constant. New Motor Plants Questions 2019
D The offshore supply vessel to which you are assigned is fitted with generator set drive engines as shown in the illustration. What statement is true in terms of the combustion chamber design? Illustration MO-0006 The engine uses turbulence chambers with a hemispherical fire-deck. The engine uses an open type combustion chamber with a hemispherical fire-deck. The engine uses pre-combustion chambers with a flat fire-deck. The engine uses an open type combustion chamber with a flat fire-deck. New Motor Plants Questions 2019
A The offshore supply vessel to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. What statement is true concerning the turbocharger charge air discharge arrangements? Illustration MO-0177 The left side turbocharger discharges charge air to the right cylinder bank, and the right side turbocharger discharges charge air to the left cylinder bank. The left side turbocharger discharges charge air to the left cylinder bank, and the right side turbocharger discharges charge air to the right cylinder bank. The left side turbocharger discharges charge air to both cylinder banks, and the right side turbocharger discharges charge air to both cylinder banks. It is not possible to determine the turbocharger charge air discharge arrangements in this particular drawing. New Motor Plants Questions 2019
D The manufacturer of the main propulsion diesel engines on your oil platform supply vessel specifies the requirements for total hardness of fresh water makeup for the closed, recirculating fresh water cooling system in milligrams per liter (mg/L). If the fresh water test reported a total hardness of 5.7 grains per gallon (gpg), using the conversion chart of the illustration, what would be the total hardness in mg/L? Illustration MO-0208 0.333 mg/L 0.9748 mg/L 9.757 mg/L 97.57 mg/L New Motor Plants Questions 2019
B The main propulsion diesel engines used to power the offshore supply boat to which you are assigned are started with vane-type air-starting motors designed to operate at 250 psig. The in-line lubricator should provide 3 drops of oil per cranking minute, as long as the in-line lubricator oil viscosity is as specified. If the start air pressure is within the normal range and the oil viscosity is correct, but the oil injection rate is only 1 drop per minute, what should be done? The starting air pressure supplied to the air-starting motors should be increased. The in-line lubricator oil injection metering needle valve should be further opened. The in-line lubricator oil injection metering needle valve should be further closed. The oil in the in-line lubricator should be replaced with oil of lower viscosity than specified. New Motor Plants Questions 2019
B The main propulsion diesel engines fitted on your tug are started with vane-type air-starting motors. What statement concerning air-start motor lubricator maintenance is true? (Assume a metal bowl fitted with a tubular sight glass.) The lubricator reservoir bowl should be re-filled with clean oil as soon as the level drops to the very upper part of the glass. The lubricator reservoir bowl should be re-filled with clean oil when it becomes approximately half full as shown in the glass. The lubricator reservoir bowl should be re-filled with clean oil when it is estimated that the bowl is completely empty. The lubricator reservoir bowl should be re-filled with clean oil when the level is no longer visible in the glass. New Motor Plants Questions 2019
D The main engines on your anchor handling supply vessel are equipped with manual shutdown levers as shown in the illustration. What statement concerning manual shutdown is true? Illustration MO-0171 The manual shutdown lever is operated by means of the over speed trip reset lever and uses the over speed trip mechanism to accomplish engine shutdown. The manual shutdown lever is operated by means of a remote pull cable and uses the governor fuel control linkage to accomplish engine shutdown. The manual shutdown lever is operated by means of the emergency trip reset lever and uses the governor fuel control linkage. The manual shutdown lever is operated by means of a remote pull cable and uses the over speed trip mechanism to accomplish engine shutdown. New Motor Plants Questions 2019
D The main diesel engines on your general purpose supply vessel are protected with an array of devices designed to provide an alarm or possible shutdown for various unsafe conditions. During the maintenance procedure for adjusting the alarm and/or trip point setting for such a device, which of the following devices would have a time delay associated with it? Engine coolant high temperature alarm device. Engine crankcase high pressure trip/alarm device. Engine overspeed trip/alarm device. Engine low lube oil pressure trip/alarm device. New Motor Plants Questions 2019
B The lubricating oil system supporting the main propulsion reduction gear on the platform supply vessel to which you are assigned is fitted with a sea water cooled 4-pass shell and tube lube oil cooler. The water box sacrificial zinc anodes must be inspected periodically. Which of the following listed actions correctly states maintenance criteria pertaining to scale build-up on the zincs? Any sacrificial zinc anodes with accumulated scale build-up should be replaced regardless of the degree of deterioration. Any accumulated scale build-up on sacrificial zinc anodes should be scraped off until the zinc anodes are shiny. Any accumulated scale build-up on sacrificial zinc anodes should be left intact to ensure proper protection from galvanic corrosion. There is no need to check for scale build-up on the sacrificial zinc anodes as this phenomenon is not physically possible. New Motor Plants Questions 2019
D The heating plant on your anchor handling supply vessel is of the type shown in the illustration. What statement is true concerning the system pumps? Illustration MO-0194 The circulating and feed pumps both run continuously. The circulating and feed pumps both run intermittently. The circulating pump runs intermittently and the feed pump runs continuously. The circulating pump runs continuously and the feed pump runs intermittently. New Motor Plants Questions 2019
D The harbor tug to which you are assigned has diesel generators fitted with injectors with the operating principle as shown in the illustration. What statement is true concerning the metering principle used in this system? Illustration MO-0146 The amount of fuel injected is dependent upon the cylinder compression pressure and the cylinder compression temperature. The amount of fuel injected is dependent upon the distance of plunger travel. The amount of fuel injected depends upon the injector pre-load torque setting. The amount of fuel injected is dependent upon the pressure of the inlet fuel to the injector and the length of time the orifice is open during metering. New Motor Plants Questions 2019
B The fresh water cooling systems serving the main engines on your general purpose supply vessel are arranged as shown in the illustration. If coolant drain valves are inadvertently opened during engine operation, what combination set of symptoms would most likely result? Illustration MO-0138 Low level in the jacket water expansion tank. High fresh water outlet temperature from the engine. High fresh water pump(s) discharge pressure. Low level in the jacket water expansion tank. High fresh water outlet temperature from the engine. Low fresh water pump(s) discharge pressure. High level in the jacket water expansion tank. High fresh water outlet temperature from the engine. High fresh water pump(s) discharge pressure. Low level in the jacket water expansion tank. Low fresh water outlet temperature from the engine. Low fresh water pump(s) discharge pressure. New Motor Plants Questions 2019
A The diesel engines on your general purpose supply vessel are all protected with dry-type air filters. The air filters should be inspected and replaced in accordance with manufacturer instructions. What is the generally accepted criteria that would dictate when filter replacement becomes necessary? The air filter element should be replaced when the pressure drop across the element increases above the specified maximum. The air filter element should be replaced when the pressure drop across the element decreases below the specified minimum. The air filter element should be replaced when the pressure rise across the element increases above the specified maximum. The air filter element should be replaced when the pressure rise across the element decreases below the specified minimum. New Motor Plants Questions 2019
A The diesel engine connecting rods shown in the illustration are distinctively named __________. Illustration MO-0122 fork and blade hook and nail male and female left hand and right hand New Motor Plants Questions 2019
C The auxiliary oil-fired water-tube steam boiler on your ship-docking tug is equipped with a water column similar to that shown in the illustration. Assuming that the water level is at the normal operating water level (NOWL) of the boiler, what would be the result of alternately opening and reclosing each of the water column tri-cocks? Illustration MO-0093 Steam should issue from the uppermost tri-cock, and water should issue from both the middle and lowermost tri-cocks. Steam should issue from both the uppermost and middle tri-cocks, and water should issue from the lowermost tri-cock. Steam should issue from the uppermost tri-cock, and water should issue from lowermost tri- cock. Either steam or water could issue from the middle tri-cock. Water should issue from each of the uppermost, middle, and lowermost tri-cocks. New Motor Plants Questions 2019
B The auxiliary oil-fired fire-tube steam boiler fitted on your vessel is equipped with a water level electrode assembly similar to that shown in the illustration. Under normal circumstances, what would be considered a normal operating water level (NOWL)? Illustration MO-0047 Anywhere from the top of the electrode labeled "C" to the bottom of the electrode labeled "C". Anywhere from the bottom (tip) of the electrode labeled "B" to the bottom (tip) of the electrode labeled "C". Anywhere from the top of the electrode labeled "B" to the bottom of the electrode labeled "B". Anywhere from the bottom (tip) of the electrode labeled "B" to the bottom (tip) of the electrode labeled "E". New Motor Plants Questions 2019
B The anchor handling vessel to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In terms of operating cycle and cylinder configuration, what statement is true? Illustration MO-0006 This is a two-stroke cycle, 45 V-type engine. This is a four-stroke cycle, 90 V-type engine. This is a two-stroke cycle, 90 V-type engine. This is a four-stroke cycle, 45 V-type engine. New Motor Plants Questions 2019
A The anchor handling vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. Which control valve is responsible for by-passing the inflation delay orifice to insure rapid and positive reversals and to protect the clutches from excessive slip? Illustration MO-0167 H5 boost relay air valve. C2 speed-slip relay valve. H5 governor limit relay air valve. H5 inflation air relay valve. New Motor Plants Questions 2019
C The anchor handling vessel to which you are assigned has a main propulsion engine of the type shown in the illustration. In terms of piston action, operating cycle, and piston type, what statement is true concerning this engine type? Illustration MO-0069 This is a double-acting, four-stroke cycle, opposed piston type engine. This is a double-acting, two-stroke cycle, crosshead piston type engine. This is a single-acting, two-stroke cycle, opposed piston type engine. This is a single-acting, two-stroke cycle, crosshead piston type engine. New Motor Plants Questions 2019
B Suppose your ship docking tug is equipped with 4-stroke diesel generator set drive engines fitted with the type of charge air blower show in Fig. "B" of the illustration. In terms of the pressure of the charge air entering the intake manifold, what statement is true? Illustration MO-0178 The pressure decreases as the engine speed increases, which is independent of engine load. The pressure increases as the turbocharger speed increases, which is a function of the engine load. The pressure increases as the engine speed increases, which is independent of engine load. The pressure decreases as the turbocharger speed increases, which is a function of the engine load. New Motor Plants Questions 2019
D Piston rings are replaced on the cylinder unit of a medium or slow speed diesel engine. All measurements of the cylinder liner and piston are within limits, as is condition of intake/exhaust valves. What is the end result of the ring replacement? Increased cylinder compression ratio. Reduced mechanical wear of the cylinder liner. Decreased cylinder clearance volume. Increased cylinder compression pressure and efficiency. New Motor Plants Questions 2019
A One cylinder on an auxiliary diesel engine indicates a low firing pressure and high exhaust temperature. Which of the following operating conditions would most likely have caused this? late injection timing air intake clogged early injection timing low back pressure New Motor Plants Questions 2019
B On which of the following auxiliary boiler types would soot blowers be equipped for maintaining heat transfer efficiency? Water-tube forced-circulation steam boiler Water-tube natural-circulation steam boiler Fire-tube steam boiler Electric steam boiler New Motor Plants Questions 2019
B In preparation for getting a salvage tug underway, what is the primary factor to consider in whether or not pre-lubrication of the main propulsion engines shall be necessary? The ambient temperature in the engine room. The length of time that the engine has been shutdown. The interval of time since the last engine overhaul. The viscosity of the lubricating oil. New Motor Plants Questions 2019
D In preparation for getting a platform supply vessel underway, what is the primary factor to consider in whether or not pre-lubrication of the main propulsion engines shall be necessary? The ambient temperature in the engine room. The viscosity of the lubricating oil. The interval of time since the last engine overhaul. The length of time that the engine has been shutdown. New Motor Plants Questions 2019
A In a modern two stroke, slow speed, internal combustion diesel engine, what is the part of the engine that houses the crankshaft? bedplate sump cylinder block frame New Motor Plants Questions 2019
D Honing of a cylinder liner is performed to retrain a certain amount of lubricating oil which reduces the wear on the piston rings and cylinder liner. A two-step honing process consists of pre-honing and __________. Post-honing Finish honing Conventional honing Plateau honing New Motor Plants Questions 2019
B Exhaust system back pressure is customarily measured at the discharge of a turbocharger. If the exhaust system back pressure is higher than normal for a given engine load on your OSV at the point of measurement, which of the following conditions would most likely account for this? Restricted turbocharger turbine inlet screen. Restricted exhaust silencer/muffler. Restricted exhaust ports or valves. Restricted turbocharger air intake filter. New Motor Plants Questions 2019
B Before shutting down the main propulsion engines on an offshore supply vessel, ideally what should be accomplished FIRST? The engine should be shut down immediately with no delay period, regardless of the engine load. The engine should be operated with the load removed from the engine for several minutes, then shut down. The engine should be operated at rated load for several minutes, then shut down. The engine should be operated at a steady, but substantial load for several minutes, then shut down. New Motor Plants Questions 2019
D Before shutting down the main propulsion engines on a tractor tug, ideally what should be accomplished FIRST? The engine should be operated at rated load for several minutes, then shut down. The engine should be shut down immediately with no delay period, regardless of the engine load. The engine should be operated at a steady, but substantial load for several minutes, then shut down. The engine should be operated with the load removed from the engine for several minutes, then shut down. New Motor Plants Questions 2019
C All modern medium and slow speed diesel engines have components assembled via bolts that are tensioned hydraulically, both for removal and reassembly. When using such hydraulic devices, to what metallurgical state are you subjecting such bolts? When tightened, they are above the metal's elastic limit. When tightened, they are at the metal's elastic limit. When tightened, they are below the metal's elastic limit. Initially above the metal's elastic limit. New Motor Plants Questions 2019
A After a main diesel engine on your vessel has experienced a safety shutdown due to excessive crankcase pressure, why is it important to wait 2 hours before opening the crankcase to investigate the cause of the trip? Opening the crankcase before 2 hours has elapsed may result in a crankcase explosion. Opening the crankcase before 2 hours has elapsed may result in crankshaft rotation. Opening the crankcase before 2 hours has elapsed may result in the engine spontaneously restarting. Opening the crankcase before 2 hours has elapsed may result in excessively rapid cooling. New Motor Plants Questions 2019
B A main engine on your general purpose supply vessel has experienced a low coolant water level alarm even though the water level in the expansion tank is normal. Assuming that the float activated switch is designed to open at low coolant level to activate the alarm, which of the following would account for this? The float is binding in the float chamber, not permitting the float to drop. The float switch wire connections are loose at the terminals, not permitting continuity through the switch. The float level switch contacts are welded closed, not permitting the contacts to open. It is not possible for a low coolant level alarm to occur when the water level is normal. New Motor Plants Questions 2019
C A main engine on your articulated tug-barge unit has experienced a low coolant water level alarm even though the water level in the expansion tank is normal. Assuming that the float activated switch is designed to open at low coolant level to activate the alarm, which of the following would account for this? The float is binding in the float chamber, not permitting the float to drop. The float level switch contacts are welded closed, not permitting the contacts to open. The float switch wire connections are loose at the terminals, not permitting continuity through the switch. It is not possible for a low coolant level alarm to occur when the water level is normal. New Motor Plants Questions 2019
A A main diesel engine on your vessel has experienced a safety shutdown due to excessive crankcase pressure. What is the appropriate response? Allow 2 hours for the engine to cool before opening the crankcase, and determine and correct the cause of the trip before attempting to restart the engine. Allow the engine to cool off for two minutes, then restart and monitor the crankcase pressure to verify the cause of the shutdown. Immediately open the crankcase to make the necessary inspections to determine the cause of the high crankcase pressure safety shutdown. Immediately restart the engine, and monitor the crankcase pressure to verify the cause of the shutdown. New Motor Plants Questions 2019
C According to the illustrated cooling water systems diagram for a diesel propulsion plant, what is the cooling medium used as a coolant in the charge air cooler(s)? Illustrations MO-0129 Sea water Main engine cylinder jacket water Central fresh water Auxiliary engine (SSDG) cylinder jacket water New Motor Plants Questions 2020
D What type of diesel engine starting motor is pictured in the illustration? Illustration MO-0044 Direct current electric cranking motor Axial piston hydraulic cranking motor Radial piston hydraulic cranking motor Sliding vane air cranking motor New Motor Plants Questions 2020
B Which of the below engines might power a large merchant vessel with a direct drive controllable pitch propeller? Medium speed, non-reversing engines Slow speed, non-reversing engines Slow speed, reversing engines Medium speed, reversing engines New Motor Plants Questions 2020
D You are assigned to an offshore oil spill response vessel fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. When do the intake valves open and close respectively? Illustration MO-0084 The intake valves open at 45 after bottom dead center on the compression stroke. The intake valves close at 75o before top dead center on the exhaust. The intake valves open at top dead center at the beginning of the intake stroke. The intake valves close at bottom dead center at the end of the intake stroke. The intake valves open at bottom dead center at the end of the intake stroke. The intake valves close at top dead center at the beginning of the intake stroke. The intake valves open at 75 before top dead center on the exhaust stroke. The intake valves close at 45o after bottom dead center on the compression stroke. New Motor Plants Questions 2020
A When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your offshore crew boat while underway, what should be the expansion tank level? The level should be in the upper part of the sight glass when the engine is at operating temperature. The level should be in the lower part of the sight glass when the engine is at operating temperature. The level should be out of sight high in the sight glass when the engine is at operating temperature. The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature. New Motor Plants Questions 2020
A When starting a main propulsion diesel engine fitted with attached pumps in preparation for getting underway on your offshore supply vessel, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Lubricating oil supply header pressure. Sea water pump discharge pressure. Cylinder jacket water pump discharge pressure. Fuel oil supply header pressure. New Motor Plants Questions 2020
D The various auxiliary diesel engines fitted on your anchor handling vessel may employ a variety of different cranking methods for engine starting. What type of cranking method is shown in the illustration? Illustration MO-0044 Gasoline engine cranking motor Hydraulic cranking motor Electric cranking motor Air cranking motor New Motor Plants Questions 2020
A The multi-purpose supply vessel to which you are assigned has diesel generators fitted with fuel systems as shown in the illustration. What statement is true concerning items "11", "13", and "15"? Illustration MO-0154 Item "11" is a high-pressure fuel line. Item "13" is the common injector leak off line Item "15" is the injection pump return line. Item "11" is a high-pressure fuel line. Item "13" is the common rail supply line Item "15" is the injection pump return line. Item "11" is a high-pressure fuel line. Item "13" is the common injector leak off line. Item "15" is the injection pump supply line. Item "11" is a low-pressure fuel line. Item "13" is the common injector leak off line. Item "15" is the injection pump return line. New Motor Plants Questions 2020
D The anchor handling supply vessel to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in the illustration. What does the component labelled "3" represent? Illustration MO-0176 Charge air manifold. Exhaust manifold. Wet muffler. Charge air cooler. New Motor Plants Questions 2020
B You are replacing an automotive type cooling water thermostat on one of the diesel generator sets on your anchor-handling supply vessel. The markings on the original thermostat indicate that it was set to begin opening at 180F. Which of the following thermostats marked for Celsius would be a replacement that comes closest to the value at which opening begins as compared to the original thermostat? 70C 80C 90C 100C New Motor Plants Questions 2020
A The pneumatic propulsion control system used on your OSV uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper technique? Illustration MO-0052 Rubber parts such as the diaphragm should be washed with soap and water, and metal parts such as the valve discs and seats should be cleaned with non-flammable solvent. Rubber parts such as the diaphragm should be cleaned with non-flammable solvent, and metal parts such as the valve discs and seats should be washed with soap and water. Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be cleaned with non-flammable solvent. Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be washed with soap and water. New Motor Plants Questions 2020
D The steam generating plant on your oil platform supply vessel is of the type shown in the illustration. Which of the labelled components would be the steam separator? Illustration MO-0196 1 2 3 5 New Motor Plants Questions 2020
C The steam generating plant on your oil spill response vessel is of the forced-circulation type. Which figure of the illustration represents a steam generator or boiler of this type? Illustration MO-0197 1 2 3 4 New Motor Plants Questions 2020
A The water-tube natural-circulation steam boiler on your general-purpose supply vessel is equipped with soot blowers for maintaining heat transfer efficiency. Which of the following statements best describes the conditions that must be met before tubes can be safely blown using the soot blowers? The boiler draft must be increased AND the boiler fires must be lit before tubes can be safely blown. The boiler draft must be decreased AND the boiler fires must be lit before tubes can be safely blown. The boiler draft must be increased AND the boiler fires must be secured before tubes can be safely blown. The boiler draft must be decreased AND the boiler fires must be secured before tubes can be safely blown. New Motor Plants Questions 2020
B Which of the following conditions best describes the reason for performing a bottom blow on an auxiliary steam boiler as fitted on your offshore supply vessel? High water Sludge removal Priming and carryover Excess chemicals and/or salinity New Motor Plants Questions 2020
B You suspect that the diesel-generator in service on your oil spill response vessel has a low coolant level. Assuming that the cooling water system is pressurized and has no sight glass associated with the expansion tank, which of the following represents the proper procedure for checking the coolant level? Shut down the engine. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. Shut down the engine, and allow the engine to cool. With a rag, very slowly remove the pressure cap to relieve the system pressure With the cap removed, check the coolant level. Allow the engine to continue to run with a normal load. With a rag, very slowly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. Allow the engine to continue to run, but with the load removed. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level. New Motor Plants Questions 2020
D What is the length of the fastener used to secure the packing gland shown in the illustration? Illustration GS-0012 1 inch 1 1/4 inches 1 1/2 inches 2 1/2 inches New Motor Plants Questions 2020
C At appropriate intervals, inspection rounds should be made of the main propulsion plant, auxiliary machinery, and steering spaces. If bilge levels are identified to be high, they should be ____________. pumped directly overboard pumped overboard through a filter pumped overboard through an OWS or to a holding tank any of the above depending on the oil content of the water New Motor Plants Questions 2020
B You are assigned to a fishing industry factory ship fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 900 rpm, what will be the rotational speed of the two camshafts? Illustration MO-0122 450 rpm 900 rpm 1800 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2020
A You are assigned to a fishing factory ship fitted with main propulsion diesel engines of the type shown in the illustration. If the engine's crankshaft is turning at 720 rpm, what will be the rotational speed of the two camshafts? Illustration MO-0005 360 rpm 720 rpm 1440 rpm Not enough information is given to determine camshaft rpm. New Motor Plants Questions 2020
B You are assigned as an engineer on an uninspected fishing trawler using main propulsion engines of the type shown in the illustration. What statement represents the procedure for inspection of the lower cylinder liner bore while in place inside the engine? Illustration MO-0122 With the particular piston positioned at BDC and the corresponding air box handhole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at TDC and the corresponding oil pan handhole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at TDC and the corresponding air box handhole cover removed, inspect the lower liner bore through the crankcase opening. With the particular piston positioned at BDC and the corresponding oil pan handhole cover removed, inspect the lower liner bore through the crankcase opening. New Motor Plants Questions 2020
A When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your fishing factory ship while underway, what should be the expansion tank level? The level should be in the upper part of the sight glass when the engine is at operating temperature. The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature. The level should be out of sight high in the sight glass when the engine is at operating temperature. The level should be in the lower part of the sight glass when the engine is at operating temperature. New Motor Plants Questions 2020
A When starting a main propulsion diesel engine fitted with attached pumps in preparation for getting underway on your fishery research vessel, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Lubricating oil supply header pressure. Cylinder jacket water pump discharge pressure. Sea water pump discharge pressure. Fuel oil supply header pressure. New Motor Plants Questions 2020
C The diesel generator engines onboard your mollusc dredger use a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MO-0181 Sump filtration Bypass filtration Full-flow filtration Shunt filtration New Motor Plants Questions 2020
B The mollusc dredger to which you are assigned has diesel generator engines fitted with intake and exhaust systems as shown in the illustration. What type of turbo charging configuration is used? Illustration MO-0176 Constant pressure turbo charging. Pulse turbo charging. Boost-controlled turbo charging. 2-stage turbo charging. New Motor Plants Questions 2020
D The fresh water cooling systems serving the main engines of the fishery research vessel to which you are assigned are arranged as shown in the illustration. What statement best describes the arrangement of the fresh water keel cooler shown in the system diagram? Illustration MO-0138 The keel cooler is mounted on the inside of the hull below the water line. The keel cooler is mounted on the inside of the hull above the water line. The keel cooler is mounted on the outside of the hull above the water line. The keel cooler is mounted on the outside of the hull below the water line. New Motor Plants Questions 2020
B The mollusc dredger to which you are assigned is fitted with reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear? Illustration MO-0085 The reduction gear is a single-input, double-reduction type of gear. The reduction gear is a single-input, single-reduction type of gear. The reduction gear is a double-input, double-reduction type of gear. The reduction gear is a double-input, single-reduction type of gear. New Motor Plants Questions 2020
D When checking the valve stem to rocker arm clearances on an auxiliary diesel engine onboard your fishery research vessel, which of the following statements concerning intake and exhaust clearances when taken cold is correct? When taken cold, a properly adjusted exhaust valve clearance could be less than or greater than the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance would definitely be less than the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance would definitely be equal to the intake valve clearance. When taken cold, a properly adjusted exhaust valve clearance would definitely be greater than the intake valve clearance. New Motor Plants Questions 2020
B The main propulsion diesel engines on the fishery research vessel to which you are assigned are started with vane-type air-starting motors. At a minimum, in the absence of automatic drain valves, how often should the starting air receivers be drained of moisture while the vessel is underway? Hourly Daily Weekly Monthly New Motor Plants Questions 2020
B The diesel generator sets on your mollusc dredger use a starting system similar to the one shown in the illustration. While the engine is running, the starting battery bank terminal voltage and specific gravity gradually fall off and the ammeter indicates a discharging battery bank, eventually resulting in a dead battery bank. Which of the following failures would most likely result in this condition? Illustration MO-0202 An open circuited start switch. An open voltage regulator/alternator field circuit. An open circuited starter solenoid coil. A closed oil pressure switch. New Motor Plants Questions 2020
C On diesel engines used on a fishing industry factory ship, which type of injection system is most likely to use sophisticated electronic controls for timing and metering? In-line multi-plunger pump Distributor type pump Unit injector type pump Rotary plunger type pump New Motor Plants Questions 2020
D The mollusc dredger to which you are assigned has diesel generators fitted with unit injectors of the type shown in the illustration. What statement is true concerning the operation of unit injectors of this type? Illustration MO-0143 Pressurization of the fuel is accomplished by the electronically controlled solenoid, and the timing and metering of the fuel is accomplished by the mechanically operated rocker arm. Pressurization and timing of the fuel is accomplished by the mechanically operated rocker arm, and the metering of the fuel is accomplished by the electronically controlled solenoid. Pressurization and metering of the fuel is accomplished by the mechanically operated rocker arm, and the timing of the fuel is accomplished by the electronically controlled solenoid. Pressurization of the fuel is accomplished by the mechanically operated rocker arm, and the timing and metering of the fuel is accomplished by the electronically controlled solenoid. New Motor Plants Questions 2020
B The main propulsion diesel engines on the fishery research vessel to which you are assigned are fitted with mechanically operated and controlled unit injectors. When are the sintered metal supply and return injector filters typically replaced? Whenever the coalescing fuel filters are drained of sludge and moisture. Whenever the unit injectors are removed for reconditioning. Whenever the fuel system secondary filter elements are replaced. Whenever the fuel system primary suction strainer is cleaned. New Motor Plants Questions 2020
A The two-stroke cycle main propulsion engines on the fishing trawler to which you are assigned are fitted with Roots-type blowers for scavenging purposes. Upon inspection of the air boxes, what condition would indicate a need to replace the Roots-type blower immediately? Aluminum dust residue. Iron dust residue. Water accumulations. Oil accumulations. New Motor Plants Questions 2020
C The pneumatic propulsion control system used on your fishing factory ship uses a diaphragm- operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper technique? Illustration MO-0052 Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be washed with soap and water. Rubber parts such as the diaphragm should be cleaned with non-flammable solvent, and metal parts such as the valve discs and seats should be washed with soap and water. Rubber parts such as the diaphragm should be washed with soap and water, and metal parts such as the valve discs and seats should be cleaned with non-flammable solvent. Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be cleaned with non-flammable solvent. New Motor Plants Questions 2020
B The fishing factory ship to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If the astern clutch fails to engage from the engine room control station, but engages properly from all remote-control stations, which of the following system faults best accounts for these symptoms? Illustration MO-0168 The clutch actuator 4-way control valve at the clutch control panel has a restricted astern clutch quick exhaust port opening. The control lever at the engine room control station has a blocked astern clutch engagement pilot port. The astern clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. The local/remote transfer valve at the engine room control station has a blocked local port. New Motor Plants Questions 2020
A Using the oil chart provided in the illustration for guidance, what would be the recommended straight weight petroleum oil to use in a main engine speed control governor on your fishery research vessel, if the governor is to remain in the acceptable operating range and the governor oil operating temperature may drop as low as 40F? Illustration MO-0161 SAE 10 SAE 20 SAE 30 SAE 40 New Motor Plants Questions 2020
A In recording trend analysis data for the main propulsion engines on your anchor-handling supply boat, it is important to take and record readings under similar, if not constant conditions of load and speed each time. What other criteria must be considered as to when the readings are to be recorded? The readings should be recorded when the lube oil and cooling water temperatures are stabilized within plus or minus 5oF of normal operating temperature under the conditions of specified load and speed. The readings should be recorded when the lube oil and cooling water temperatures are stabilized within plus or minus 50oF of normal operating temperature under the conditions of specified load and speed. The readings should be recorded the instant the specified load and speed conditions are achieved without regard to engine operating temperatures. The readings should be recorded when the cylinder exhaust temperatures are all within 5oF of each other under the conditions of specified load and speed. New Motor Plants Questions 2020
A The main engines on your OSV utilize a starting system with two air-start motors similar to that shown in the illustration. Upon pushing the start button, the solenoid air valve energizes open, but the air start relay valve fails to receive pilot air, and thus the starter motors and engine fail to rotate. Which of the listed conditions would most likely be the cause of the failure to start? Illustration MO-0200 The lower pinion fails to engage, which in turn does not allow the upper pinion to engage. Because engagement of both pinions is required to supply air to the air-start motors, the engine does not start. The upper pinion fails to engage, which in turn does not allow the lower pinion to engage. Because engagement of both pinions is required to supply air to the air-start motors, the engine does not start. The upper pinion fails to retract, which in turn does not allow the lower pinion to retract. Because retraction of both pinions is required to supply air to the air-start motors, the engine does not start. The lower pinion fails to retract, which in turn does not allow the upper pinion to retract. Because retraction of both pinions is required to supply air to the air-start motors, the engine does not start. New Motor Plants Questions 2020
C The multi-purpose supply vessel to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A" which plunger travel position corresponds to when fuel injection ends? Illustration MO-0144 1 2 3 4 New Motor Plants Questions 2020
D The multi-purpose supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What must be the position of the two transfer valves within the system when the mechanical slave remote control station is being used to control propulsion? Illustration MO-0168 The transfer valve at the engine room control station must be in the pilot house position, and the transfer valve at the pilot house pneumatic master control station must be in the pneumatic remote control position. The transfer valve at the engine room control station must be in the engine room position, and the transfer valve at the pilot house pneumatic master control station must be in the pneumatic remote control position. The transfer valve at the engine room control station must be in the engine room position, and the transfer valve at the pilot house pneumatic master control station must be in the pilot house position. The transfer valve at the engine room control station must be in the pilot house position, and the transfer valve at the pilot house pneumatic master control station must be in the pilot house position. New Motor Plants Questions 2020
B The multi-purpose supply vessel to which you are assigned has main engines fitted with injectors similar to those shown in the illustration. What statement is true concerning the operating principle of this type of injector? Illustration MO-0151 The fuel pressure within the annulus and the compression load on the spring are both needle valve opening forces. The fuel pressure within the annulus is a needle valve opening force, the compression load on the spring is a needle valve closing force. The fuel pressure within the annulus is a needle valve closing force, the compression load on the spring is a needle valve opening force. The fuel pressure within the annulus and the compression load on the spring are both needle valve closing forces. New Motor Plants Questions 2020
C The multi-purpose supply vessel to which you are assigned is fitted with main propulsion reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear? Illustration MO-0142 This type of reduction gear is used with a fixed pitch propeller and a reversing engine. This type of reduction gear is used with a controllable pitch propeller and a reversing engine. This type of reduction gear is used with a fixed pitch propeller and a non-reversing engine. This type of reduction gear is used with a controllable pitch propeller and a non-reversing engine. New Motor Plants Questions 2020
B The offshore supply vessel to which you are assigned has diesel generators fitted with injectors with the operating principle as shown in the illustration. What statement is true concerning the metering principle used in this system? Illustration MO-0146 The amount of fuel injected is dependent upon the distance of plunger travel. The amount of fuel injected is dependent upon the pressure of the inlet fuel to the injector and the length of time the orifice is open during metering. The amount of fuel injected depends upon the injector pre-load torque setting. The amount of fuel injected is dependent upon the cylinder compression pressure and the cylinder compression temperature. New Motor Plants Questions 2020
A The offshore supply vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MO-0168 The local/remote transfer valve at the engine room control station has a blocked remote port. The local/remote transfer valve at the engine room control station has a blocked local port. The attendance valve at the pneumatic remote control station has a blocked outlet port. The pilot house/remote transfer valve at the pilot house has a blocked remote port. New Motor Plants Questions 2020
B The platform supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What statement is true concerning transfer of control? Illustration MO-0168 The transfer valve at the pneumatic remote control station is used to transfer control of propulsion from the pneumatic remote control station to the mechanical slave remote control station or vice versa. The transfer valve at the engine room control station is used to transfer control of propulsion from the engine room control station to the pilot house pneumatic master control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the mechanical slave remote control station or vice versa. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the engine room control station or vice versa. New Motor Plants Questions 2020
A The platform supply vessel to which you are assigned has main engines fitted with open type combustion chambers featuring direct injection. Of the listed figures below found in the illustration, which figure represents the most likely type of injector nozzle type? Illustration MO-0148 1 2 3 4 New Motor Plants Questions 2020
D The pneumatic propulsion control system used on your offshore supply vessel is configured as shown in the illustration. In terms of clutch air system maintenance, what statement best represents operational requirements? Illustration MO-0168 Whereas the cleanliness of clutch air is critical, the dryness and pressure are clutch air are of secondary concern. Whereas the clutch air pressure is critical, the dryness and cleanliness of the clutch air are of secondary concern. Whereas the dryness of clutch air is critical, the pressure and cleanliness of the clutch air are of secondary concern. The pressure, dryness, and cleanliness of clutch air are all critical to successful pneumatic propulsion control operations. New Motor Plants Questions 2020
A The rated speed of the main propulsion diesel engines on your oil platform supply vessel is 900 rpm. The installed centrifugal overspeed trip device similar to the one shown in the illustration is designed to shut down the engine at 110% of rated speed. Upon testing the overspeed trip device, you determine that the actual shutdown occurs at 1080 rpm. Which of the following would account for this? Illustration MO-0101 The compression spring (item #12) was excessively compressed when the overspeed trip was last set. The jam nut (item #14) was not properly tightened against the adjusting nut (items #13) when the overspeed trip was last set. The compression spring (item #12) has broken since the last time the overspeed trip was last set. The compression spring (item #12) was insufficiently compressed when the overspeed trip was last set. New Motor Plants Questions 2020
D The turbocharged, four-stroke, diesel generator set drive engines on your OSV are protected with dry-type air intake filters. The filter element condition can be evaluated by attaching a water manometer to measure the vacuum in the air duct between the air intake filter and the turbocharger blower inlet. Assuming that the filter condition is evaluated at rated engine rpm under full load, what statement is true if the restriction associated with a clean, properly sealing filter element is 10" of water column (negative)? A reading of 15" of water column (negative) could indicate that the filter element is restricted with dust or that the filter element is being bypassed due to an improper seal. Either condition is equally likely to result in this reading. A reading of 5" of water column (negative) could indicate that the filter element is restricted with dust or that the filter element is being bypassed due to an improper seal. Either condition is equally likely to result in this reading. A reading of 5" of water column (negative) indicates that the filter element is restricted with dust, and a reading of 15" of water column (negative) indicates that the filter element is being bypassed due to an improper seal. A reading of 15" of water column (negative) indicates that the filter element is restricted with dust, and a reading of 5" of water column (negative) indicates that the filter element is being bypassed due to an improper seal. New Motor Plants Questions 2020
B When rolling over a main engine on your anchor handling vessel prior to starting with the cylinder test valves open to expel any fluids accumulated within the cylinders, a rather large amount of water is discharged. What is the appropriate response? Start the engine, but maintain the jacket water expansion tank level higher than normal. Do not allow the engine to be started until the cause of the water discharge has been determined and corrected. Start the engine, but run the engine with the cylinder test valves cracked slightly open. Start the engine, but monitor all fluid levels very closely, especially that of the jacket water. New Motor Plants Questions 2020
C You are assigned to an anchor handling vessel fitted with main propulsion diesel engines operating on the cycle represented in the polar timing diagram shown in the illustration. What combustion cycle event has a duration of 103? Illustration MO-0206 Exhaust Compression Power Intake New Motor Plants Questions 2020
B Your platform supply vessel is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. Which heat exchanger/cooler application and aspect would most likely require periodic mechanical cleaning with a specially designed brush? Illustration MO-0137 The outside of the tubes of the RW/FW heat exchanger. The inside of the tubes of the RW/FW heat exchanger. The outside of the tubes of the lube oil cooler. The inside of the tubes of the lube oil cooler. New Motor Plants Questions 2020
A A diesel engine on your platform supply vessel has a restricted exhaust silencer/muffler resulting in high exhaust back pressure. With an appreciable load on the engine, what would be the condition of the exhaust gases exiting the stack? Gray to black smoke. Bluish tinge smoke. White smoke. Clear, with no smoke. New Motor Plants Questions 2020
B A few hours after changing the oil on one of the diesel generator set engines on your offshore supply vessel, you notice that the oil is significantly darkened. What does this normally indicate? The darkening of the color definitely indicates severe overheating of the lubricating oil which requires another oil change after determining and correcting the cause of overheating. The darkening of the color normally indicates the suspension of fine particles of unburned carbon (soot) which is a normal occurrence and does not require another oil change. The darkening of the color normally indicates water contamination of the lubricating oil which requires another oil change after determining and correcting the source of contamination. The darkening of the color normally indicates diesel fuel contamination of the lubricating oil which requires another oil change after determining and correcting the source of contamination. New Motor Plants Questions 2020
C The auxiliary steam boiler on your fishing vessel is equipped with a gauge glass for local level indication. On which of the following auxiliary boiler types would this gauge glass be attached to a flash chamber also known as a steam accumulator or steam separator? Fire-tube steam boiler Electric steam boiler Water-tube forced-circulation steam boiler Water-tube natural-circulation steam boiler New Motor Plants Questions 2020
D The uninspected fishing trawler to which you are assigned has diesel generators fitted with unit injectors with the operating principle as shown in the illustration. What statement is true concerning the beginning and ending of injection? Illustration MO-0144 Injection begins when the lower fuel port is covered by the lower helix of the upward moving plunger, and injection ends when the upper fuel port is uncovered by the upper helix of the upward moving plunger. Injection begins when the upper fuel port is covered by the upper helix of the upward moving plunger, and injection ends when the lower fuel port is uncovered by the lower helix of the upward moving plunger. Injection begins when the lower fuel port is covered by the lower helix of the downward moving plunger, and injection ends when the upper fuel port is uncovered by the upper helix of the downward moving plunger. Injection begins when the upper fuel port is covered by the upper helix of the downward moving plunger, and injection ends when the lower fuel port is uncovered by the lower helix of the downward moving plunger. New Motor Plants Questions 2020
B The pressure-volume (P-V) diagram shown in the illustration represents a theoretical diesel engine cycle which ideally represents all diesel engines, including those used in the towing industry. What statement is true concerning the combustion cycle event represented between points "2" and "3" in figure "B" of the illustration? Illustration MO-0205 This represents the expansion event occurring at constant volume. This represents the combustion event occurring at constant pressure. This represents the compression event occurring at constant pressure. This represents the combustion event occurring at constant volume. New Motor Plants Questions 2020
B You are assigned to a tractor tug fitted with main propulsion diesel engines of the type shown in the illustration. How many degrees of crankshaft revolution are required for all of the engine's cylinders to fire? Illustration MO-0227 180 degrees 360 degrees 720 degrees Not enough information is given to determine crankshaft degrees of revolution. New Motor Plants Questions 2020
B Prior to starting a diesel generator set engine fitted on your salvage tug, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil? When the oil level rises to a level well above the FULL mark on the dipstick. When the oil level rises to the FULL mark on the dipstick. When the oil level rises to the between the ADD and FULL marks on the dipstick. When the oil level rises to the ADD mark on the dipstick. New Motor Plants Questions 2020
A Related to the diesel fuels used in auxiliary and main propulsion diesel engines used on the ship- docking tug to which you are assigned, the unit of measure expressed as centistokes (cSt) is a measure of what fuel property? Viscosity Cetane rating Density Heating value New Motor Plants Questions 2020
C The tractor tug to which you are assigned has diesel generators fitted with a fuel injection system that have a complete absence of high pressure fuel lines. Which figure of the illustration represents the most likely type of fuel injection equipment used? Illustration MO-0149 1 2 3 4 New Motor Plants Questions 2020
D The river push boat to which you are assigned has diesel generator engines fitted with intake and exhaust systems as shown in the illustration. What type of turbo charging configuration is used? Illustration MO-0176 2-stage turbo charging. Constant pressure turbo charging. Boost-controlled turbo charging. Pulse turbo charging. New Motor Plants Questions 2020
B The heating plant on your sea-going salvage tug is of the type shown in the illustration. What statement is true concerning the system pumps? Illustration MO-0194 The circulating and feed pumps both run intermittently. The circulating pump runs continuously and the feed pump runs intermittently. The circulating and feed pumps both run continuously. The circulating pump runs intermittently and the feed pump runs continuously. New Motor Plants Questions 2020
C While proceeding in open waters to a ship requiring docking assistance, one of the main engines on your ship-docking tug overheats. The high jacket water temperature alarm sounds, the fresh water thermometers indicate out of range (high), and the expansion tank level sight glass indicates out of range (high) with vapor bubbles forming and escaping through the vent. What is the appropriate initial response? Drain water from the expansion tank. Shut down the engine immediately. Reduce the load and speed on the engine. Add makeup water to the expansion tank. New Motor Plants Questions 2020
D Which of the following is a benefit of the common rail fuel injection system? Nitrous oxide (emissions) reduction. Lower specific fuel consumption. Smoke reduction over the entire load range. all of the above New Motor Plants Questions 2020
B The Wartsila 64 engine is equipped with automatic backflushing lube oil filter systems. These type of filtration systems require __________. frequent monitoring of differential pressure gauges minimal maintenance and no disposable filter cartridges shifting of filter units on a daily basis draining of sediment every watch New Motor Plants Questions 2020
B Pre-combustion chamber engines inject fuel into an antechamber located in the cylinder wall or cylinder head. What is the antechamber referred to when the injection nozzle is located in the main combustion chamber, outside of the antechamber? charging cell energy cell pressure pocket swirl chamber New Motor Plants Questions 2020
A What event triggers the end of the steady combustion period in a diesel engine? completion of injection piston reaching top dead center piston reaching bottom dead center intake valve or port closing New Motor Plants Questions 2020
C Large slow-speed diesel engines have cylinder liners that are manufactured from which of the following materials? High alloyed forged steel with chromium Unalloyed carbon steel Pearlitic cast iron with flake graphite Cast steel with chromium New Motor Plants Questions 2020
D Which of the following statements describes pertinent criteria for performing a surface blow for the purposes of removing excess chemicals and/or salinity as indicated by boiler water testing on an auxiliary steam boiler as fitted on your vessel? The surface blow would be performed when the boiler is steaming AND the level would be maintained normal during the duration of the blow. The surface blow would be performed when the boiler is secured AND the level would be maintained normal during the duration of the blow. The surface blow would be performed when the boiler is secured AND the level would be maintained above normal during the duration of the blow. The surface blow would be performed when the boiler is steaming AND the level would be maintained above normal during the duration of the blow. New Motor Plants Questions 2020
C Due to environmental and safety concerns, the towing winch drive diesel engine cooling water system is treated with propylene glycol for protection against freezing. According to the illustration, what would be the limit of protection if 40 pints of propylene glycol are used in treating a cooling water system with a volumetric capacity of 10 gallons? Illustration MO-0209 10F -6F -30F -53F New Motor Plants Questions 2020
A The ship-docking tug to which you are assigned has main engines fitted with injectors similar to those shown in the illustration. What statement is true concerning the operating principle of this type of injector? Illustration MO-0151 The fuel pressure within the annulus is a needle valve opening force, the compression load on the spring is a needle valve closing force. The fuel pressure within the annulus is a needle valve closing force, the compression load on the spring is a needle valve opening force. The fuel pressure within the annulus and the compression load on the spring are both needle valve opening forces. The fuel pressure within the annulus and the compression load on the spring are both needle valve closing forces. New Motor Plants Questions 2020
C The ship-docking tug to which you are assigned is fitted with main propulsion diesel engines of the type shown in the illustration. In terms of valve operating gear, cylinder liner type, and connecting rod type, what statement is true? Illustration MO-0192 This is an overhead cam engine, with wet cylinder liners and conventional connecting rods. This is an overhead cam engine, with jacketed cylinder liners and marine-type connecting rods. This is a pushrod operated overhead valve engine, with wet cylinder liners and conventional connecting rods. This is a pushrod operated overhead valve engine, with jacketed cylinder liners and articulated connecting rods. New Motor Plants Questions 2020
C The steam generating plant on your articulated tug-barge unit is of the forced-circulation type. Which figure of the illustration represents a steam generator or boiler of this type? Illustration MO-0197 1 2 3 4 New Motor Plants Questions 2020
A Suppose the diesel generator set drive engines on your ocean-going tug are fitted with pressure- compensated governors as shown in the illustration. What is the significance of the oil inlet connection with this particular governor? Illustration MO-0219 The governor uses engine oil as a lubricant and a hydraulic power medium. The governor uses variable engine lube oil pressure to sense engine speed. The governor uses low engine lube oil pressure to trigger an alarm. The governor uses low engine lube oil pressure to execute a safety shutdown. New Motor Plants Questions 2020
C Suppose the generator set drive engines on your ship docking tug are fitted with hydraulic isochronous governors such as shown in the illustration. How is the speed set point conveyed from the generator control panel on the main switchboard conveyed to the governor fitted on the diesel engine? Illustration MO-0160 Hydraulically via tubing connections Pneumatically via tubing connections Electrically via wire connections Mechanically via cable connections New Motor Plants Questions 2020
C An auxiliary plant on board a mobile offshore drilling unit that is invariably automated is the compressed air plant. Suppose the air compressors of such a plant are configured for lead-lag operation as shown in the illustration. If the sequence selector station is configured for #1 compressor to be the lead compressor and the #2 compressor to be the lag compressor, what statement is true? Illustration GS-0188 #2 compressor would be the "duty" compressor, cycling off and on when the system demand for compressed air is light, and #1 compressor would be the "standby" compressor, cycling off and on only when the system demand for compressed air is heavy. As a consequence, #1 compressor will accumulate more running hours than #2 compressor. #2 compressor would be the "duty" compressor, cycling off and on when the system demand for compressed air is light, and #1 compressor would be the "standby" compressor, cycling off and on only when the system demand for compressed air is heavy. As a consequence, #2 compressor will accumulate more running hours than #1 compressor. #1 compressor would be the "duty" compressor, cycling off and on when the system demand for compressed air is light, and #2 compressor would be the "standby" compressor, cycling off and on only when the system demand for compressed air is heavy. As a consequence, #1 compressor will accumulate more running hours than #2 compressor. #1 compressor would be the "duty" compressor, cycling off and on when the system demand for compressed air is light, and #2 compressor would be the "standby" compressor, cycling off and on only when the system demand for compressed air is heavy. As a consequence, #2 compressor will accumulate more running hours than #1 compressor. New Motor Plants Questions 2020
D Marine diesel engine dry-type mufflers reduce noise by __________. using phase adjusters decreasing back pressure at the exhaust manifold constant pulse charging at the exhaust manifold allowing gases to expand and change direction of flow New Motor Plants Questions 2020
D The vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MO-0168 The local/remote transfer valve at the engine room control station has a blocked local port. The pilot house/remote transfer valve at the pilot house has a blocked remote port. The attendance valve at the pneumatic remote-control station has a blocked outlet port. The local/remote transfer valve at the engine room control station has a blocked remote port. New Motor Plants Questions 2020
B The water-tube natural-circulation steam boiler on your vessel is equipped with soot blowers for maintaining heat transfer efficiency. Which of the following statements best describes the conditions that must be met before tubes can be safely blown using the soot blowers? The boiler draft must be decreased AND the boiler fires must be secured before tubes can be safely blown. The boiler draft must be increased AND the boiler fires must be lit before tubes can be safely blown. The boiler draft must be increased AND the boiler fires must be secured before tubes can be safely blown. The boiler draft must be decreased AND the boiler fires must be lit before tubes can be safely blown. New Motor Plants Questions 2020
B While underway on a slow-speed propulsion diesel, the duty engineer is alerted to a high scavenging air temperature at one cylinder. Which of the following could be a possible cause? Blocked scavenging air cooler. Scavenging air box fire at the piston underside. Exhaust valve leakage due to a burned seat. No water flow to the turbo-charger after cooler. New Motor Plants Questions 2020
B You are observing the flame condition on an oil-fired auxiliary boiler through an observation window peep-hole. The flame is a reddish color accompanied by a noticeably panting/pulsating furnace. What would be the correlating color of the gases exhausting from the stack under these conditions? White smoke. Dense black smoke. Clear stack. Light brown haze. New Motor Plants Questions 2020
B Diesel engines powering large vessels that directly drive fixed-pitch propellers are of what type? Medium-speed, reversing engines Slow-speed, reversing engines Medium-speed, non-reversing engines Slow-speed, non-reversing engines New Motor Plants Questions 2020
C What statement below summarizes an engine lubricating oil's viscosity given as 20W-50? The "W" designates what the additives are that are added to this oil. It is formulated for hot summer days when the cooling water temp is 50 deg F higher than the oil temperature. It is formulated for both a low temperature and a high temperature based on viscosities determined at 100 deg C. It is formulated for a metric weight of 20 milligrams at 50 deg F. New Motor Plants Questions 2020
C When a slow-speed diesel engine is used to directly drive a fixed-pitch propeller, upon execution of a stop order and cutting off fuel delivery, if there is way on the ship how is engine rotation stopped? In all cases, start air is admitted to the engine in the opposite direction of rotation until the engine stops rotating. In all cases, the engine rotation is stopped by applying the shaft brake. In some cases, a shaft brake is applied. In other cases, start air is admitted in the opposite direction until the engine stops rotating. In all cases, the engine is allowed to rotate until it eventually stops. New Motor Plants Questions 2020
C An excess pressure governor is a special type of control device. On what equipment would an excess pressure governor normally be found? main circulator pump forced draft fan turbine-driven feed pump low-pressure propulsion turbine New Motor Plants Questions 2021
A As shown in the illustration, what is the function of component "B"? Illustration MO-0231 to heat the circulating water so it will flash in the steam drum to generate superheated steam to operate a turbo-generator to condense excess steam produced in the boiler to maintain a water level in the steam drum New Motor Plants Questions 2021
C On a slow speed, crosshead type, diesel engine, in which application is the lubricating oil considered a consumable? Turbocharger lubricating oil Main circulating oil Cylinder lubricating oil Piston cooling oil New Motor Plants Questions 2021
B Sludge tanks are used in an oil lubricating system to receive __________. bilge slops that can be reclaimed after clarification foreign liquid matter, discharged from the lube oil purifier or the stripping pump makeup oil that is to be added to the system after settling all of the oil that passes through the lube oil coolers New Motor Plants Questions 2021
B With respect to motors, how is ambient temperature defined? amount of temperature developed by an operating motor temperature of the compartment where the motor is located amount of temperature rise with no load normal operating temperature, less the room temperature New Motor Plants Questions 2021
A You are inspecting the blower of a Roots-blown, two-stroke cycle main propulsion engine on the anchor-handling supply vessel to which you are assigned and discover the presence of aluminum dust on the rotors and on the air duct surfaces. What would most likely be the direct cause of this? Worn blower rotor shaft bearings. Worn blower rotor shaft seals. Restricted scavenging air intake ports. Restricted blower air intake filter. New Motor Plants Questions 2021
B The platform construction support vessel to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A" which plunger travel position corresponds to when fuel injection begins? Illustration MO-0144 1 2 3 4 New Motor Plants Questions 2021
A You are serving as an engineer onboard a mollusc dredger equipped with main propulsion diesel engines of the type shown in the illustration. What scavenging flow pattern is used in this engine type? Illustration MO-0122 Uniflow Loop Cross-flow Return-flow New Motor Plants Questions 2021
D You are assigned as an engineer on an uninspected fishing industry vessel using main propulsion engines of the type shown in the illustration. Assuming that the piston is properly positioned, what statement represents the procedure for inspection of the compression rings while in place inside the engine? Illustration MO-0005 The inspection takes place by removing the appropriate crankcase access door and viewing through the resulting opening. The inspection takes place by removing the appropriate cylinder head valve cover and viewing through the resulting opening. The inspection takes place by removing the appropriate side cover and viewing through the resulting opening. It is not possible to inspect the compression rings while in place inside the engine. New Motor Plants Questions 2021
D The various auxiliary diesel engines fitted on your uninspected fishing trawler may employ a variety of different cranking methods for engine starting. What type of cranking method is shown in the illustration? Illustration MO-0044 Electric cranking motor. Gasoline engine cranking motor. Hydraulic cranking motor. Air cranking motor. New Motor Plants Questions 2021
D The fishing seiner to which you are assigned has a pneumatic propulsion control system as shown in the illustration. When the mechanical slave remote control station is being used to control propulsion, what is the direct result of positioning the control lever in the ahead direction? Illustration MO-0168 Movement of the mechanical slave remote control station lever directly shifts the clutch actuator 4-way control valve to the ahead direction by the action of a chain or cable. Movement of the mechanical slave remote control station lever directly shifts the engine room control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. Movement of the mechanical slave remote control station lever directly shifts the pneumatic remote control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. Movement of the mechanical slave remote control station lever directly shifts the pilot house pneumatic master control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. New Motor Plants Questions 2021
A You are replacing a damaged high pressure fuel injection line for #1 cylinder on an auxiliary diesel engine onboard your fishery research vessel. Which of the following statements represents the best replacement practice or strategy? Replace the damaged fuel injection line with a factory-formed fuel injection line specifically fabricated for #1 cylinder line replacement. Replace the damaged fuel injection line with a custom fabricated line without regard to the length and configuration of the bends of the original. Custom fabricate the fuel injection line minimizing length and bends to create the shortest possible replacement fuel injection line. Custom fabricate the fuel injection line as close as possible to the fuel injection line being replaced in terms of bends and overall length. New Motor Plants Questions 2021
B The main propulsion diesel engines used to power the fishing vessel to which you are assigned are started with vane-type air-starting motors designed to operate at 250 psig. The in-line lubricator should provide 3 drops of oil per cranking minute, as long as the in-line lubricator oil viscosity is as specified. If the start air pressure is within the normal range and the oil viscosity is correct, but the oil injection rate is only 1 drop per minute, what should be done? The oil in the in-line lubricator should be replaced with oil of lower viscosity than specified. The in-line lubricator oil injection metering needle valve should be further opened. The in-line lubricator oil injection metering needle valve should be further closed. The starting air pressure supplied to the air-starting motors should be increased. New Motor Plants Questions 2021
D The main engines on your fishery research vessel utilize a starting system similar to that shown in the illustration. The air supply pressure and engine room ambient temperatures are both within the normal range. Upon attempted start-up, the engine turns very slowly, and the flow rate of air from the air starting motor exhaust is very low. Which of the listed conditions would most likely be the cause of the failure to start? Illustration MO-0203 The air-starting motor vanes are stuck in their slots. The in-line lubricator siphon tube is severely restricted. The fuel injection system piping is air-bound. The in-line strainer basket element is severely restricted. New Motor Plants Questions 2021
D A deck winch drive engine fuel system on board your uninspected fishing industry vessel is prone to becoming air bound, and you suspect a fuel system piping leak. Assuming that the diesel fuel tank is beneath the engine, that the fuel booster pump is engine driven, and that the fuel injection pump is a high pressure multi-plunger pump, where in the system would the leak most likely exist? In the fuel injection pump return line between the fuel injection pump return outlet and the fuel oil day tank (or booster pump suction as appropriate). In the booster pump discharge line between the booster pump outlet and the fuel injection pump inlet. In the fuel injection pump high pressure fuel lines between the fuel injection pump high pressure outlets to the fuel injector nozzle inlets. In the booster pump suction line between the day tank suction line and the booster pump inlet. New Motor Plants Questions 2021
B In order to minimize the abrasive action of dust particles entering the combustion spaces of the diesel engines used on the fishery research vessel to which you are assigned, each engine is protected with a heavy-duty air intake filter. Which one of the listed air intake filter elements is periodically cleaned as opposed to being periodically replaced with a new element? Panel-type filter element. Wire-mesh filter element. Multi-tube filter element. Spiral-rotor filter element. New Motor Plants Questions 2021
D The turbocharged, four-stroke, main propulsion diesel engines on your fishery research vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators? The engine should be running at idle RPM with no load (propulsion clutch disengaged). The engine should be running at idle RPM with minimal load (propulsion clutch engaged). The engine should be running at rated RPM with no load (propulsion clutch disengaged). The engine should be running at rated RPM with full load (propulsion clutch engaged). New Motor Plants Questions 2021
D Assuming the use of low sulfur content diesel fuel, what combination of conditions associated with uninspected fishing industry vessel engine room operations would most contribute to internal corrosion of exhaust systems? High ambient temperature and low engine load. Low ambient temperature and high engine load. High ambient temperature and high engine load. Low ambient temperature and low engine load. New Motor Plants Questions 2021
B The raw water boxes of the fresh water coolers serving the main propulsion diesel engines on your uninspected fishing industry vessel are fitted with sacrificial zinc anodes. Upon inspection, at what percentage of deterioration should the zinc anodes be replaced? 25% 50% 75% 100% New Motor Plants Questions 2021
D A turbocharged, two-stroke cycle main propulsion diesel engine on your fishery research vessel is emitting gray to black smoke excessively from the stack. Upon comparing the measured air box pressure against a reference engine which is producing a clear stack, the measured air box pressure is determined to be too low. Which of the following conditions would most likely be the cause for the relatively low air box pressure? Exhaust silencer/muffler is excessively restricted with carbon deposits. Turbocharger exhaust turbine inlet screen is excessively restricted. Scavenging air intake ports are excessively restricted with carbon deposits. Airside aluminum fins on after coolers are excessively restricted. New Motor Plants Questions 2021
A You are inspecting the blower of a Roots-blown, two-stroke cycle main propulsion engine on the fishing vessel to which you are assigned and discover the presence of aluminum dust on the rotors and on the air duct surfaces. What would most likely be the direct cause of this? Worn blower rotor shaft bearings. Restricted scavenging air intake ports. Restricted blower air intake filter. Worn blower rotor shaft seals. New Motor Plants Questions 2021
C The uninspected fishing industry vessel to which you are assigned is fitted with reversing reduction gears equipped with airflex pneumatic tire-type friction clutches. With the bridge in control of the main engines, you hear unusual screeching noises coming from the clutches, but only when transitioning from one direction to the other. Given the situation of changing direction from ahead to astern as an example, what is the most likely cause? The EOT handle is being left in ahead idle and then in neutral for too long a period of time. The EOT handle is being left in neutral and then in astern idle for too long a period of time. The EOT handle is being left in neutral and then in astern idle for too short a period of time. The EOT handle is being left in ahead idle and then in neutral for too short a period of time. New Motor Plants Questions 2021
B The fishing vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If the astern clutch fails to engage from all control locations, but the ahead clutch properly engages from all control locations, which of the following system faults best accounts for these symptoms? Illustration MO-0168 The control lever at the pneumatic remote control station has a blocked astern clutch engagement pilot port. The astern clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. The control lever at the engine room control station has a blocked astern clutch engagement pilot port. The ahead clutch engagement pilot air tubing has separated from the clutch actuator 4-way control valve at the clutch control panel. New Motor Plants Questions 2021
D The rated speed of the main propulsion diesel engines on your uninspected fishing industry vessel is 900 rpm. The installed centrifugal over speed trip device similar to the one shown in the illustration is designed to shutdown the engine at 110% of rated speed. Upon testing the over speed trip device, you determine that the actual shutdown occurs at 945 rpm. Which of the following would account for this? Illustration MO-0101 The throw-out weight (item #10) pivot bolt (not labeled) is binding within the counterweight (item 1 through 9) drilling. The compression spring (item #12) was excessively compressed when the over speed trip was last set. The throw-out weight (item #10) link bolt (item #15 & #16) is binding within the spring guide (item #14) drilling. The jam nut was not properly tightened against the adjusting nut (items #13) when the over speed trip was last set. New Motor Plants Questions 2021
C Using the oil chart provided in the illustration for guidance, which of the oils listed below would provide the best protection against high governor oil operating temperatures for speed control applications for fishing industry main propulsion diesel engines? Illustration MO-0161 Mobil 1 (Synthesized Hydrocarbon) DN600 (Hydrocarbon) All Proof 10W50 (Polyolester) Delvac I (Synthesized Hydrocarbon) New Motor Plants Questions 2021
A While underway in open waters on your commercial crabbing vessel, the low clutch air pressure alarm sounds and the faint odor of burning rubber is detected. What is the appropriate response? Bring the throttle and clutch control to the stop position, then investigate the cause of low clutch air pressure. Investigate the cause of low clutch air pressure, then bring the throttle and clutch control to the stop position if necessary. Reduce the load and speed on the engine, then investigate the cause of low clutch air pressure. Investigate the cause of low clutch air pressure, then reduce the engine load and speed if necessary. New Motor Plants Questions 2021
D For diesel engines, such as those used for main propulsion and auxiliary power on fishery research vessels, while running at speed, how is the ignition of fuel within the cylinder achieved? Ignition is achieved by the heat of compression created by compressing the air/fuel mixture within the cylinder into a relatively small volume. Ignition is achieved by a high voltage electric spark induced across the gap of a specially designed spark plug. Ignition is achieved by intense heat by passing electric current through the element of a specially designed glow plug. Ignition is achieved by the heat of compression created by compressing intake/charge air within the cylinder into a relatively small volume. New Motor Plants Questions 2021
C When checking the crankcase oil level on a main propulsion engine on your fishing industry line vessel while underway, what should be the oil level as indicated on the dipstick? The actual level is unimportant as long as it is visible on the dipstick when the engine is running. The level should be below the ADD mark on the side of the dipstick marked with engine IDLE and oil HOT. The level should be between the FULL and ADD marks on the side of the dipstick marked with engine IDLE and oil HOT. The level should be well above the FULL mark on the side of the dipstick marked with engine IDLE and oil HOT. New Motor Plants Questions 2021
B When starting a deck winch drive engine in preparation for seine net handling operations, what parameter must be checked FIRST upon start-up to avoid immediate engine damage? Cylinder jacket water pump discharge pressure. Engine lubricating oil supply header pressure. Winch gear oil pump discharge pressure. Fuel oil supply header pressure. New Motor Plants Questions 2021
B The deck winch drive engine onboard your fishing seiner uses a lubricating oil filtration scheme as shown in the illustration. What type of filtration system is illustrated? Illustration MO-0182 Full-flow filtration. Bypass filtration. Sump filtration. Shunt filtration. New Motor Plants Questions 2021
B The main propulsion engines onboard your fishery research vessel use a lubricating oil system as shown in the illustration. Under what circumstances will the turbo soak-back pump operate? Illustration MO-0186 It will operate at all times while the engine is running. It will run for period of time before engine start-up and after engine shutdown. It will run for a period of time prior to engine start-up only. It will run for a period of time after engine shutdown only. New Motor Plants Questions 2021
A The main diesel engines on the uninspected fishing industry vessel to which you are assigned are fitted with a metal-edge duplex suction fuel strainer, where the elements must be periodically cleaned. The engine manufacturer recommends using a petroleum based solvent for cleaning. Which of the following would typically be acceptable? Kerosene or diesel fuel. Benzene or toluene. White mineral spirits. Perchlorethylene or trichlorethylene. New Motor Plants Questions 2021
D The manufacturer of the main propulsion diesel engines on your uninspected fishing trawler specifies the requirements for total hardness of fresh water makeup for the closed, recirculating fresh water cooling system in milligrams per liter (mg/L). If the fresh water test reported a total hardness of 5.7 grains per gallon (gpg), using the conversion chart of the illustration, what would be the total hardness in mg/L? Illustration MO-0208 0.333 mg/L 0.9748 mg/L 9.757 mg/L 97.57 mg/L New Motor Plants Questions 2021
D In a closed, re-circulating fresh water cooling system used for the main engines on your fishing industry line vessel, what function would chemical treatment with molybdate primarily perform? Freezing point depression. Boiling point elevation. Biological growth inhibition. Corrosion inhibition. New Motor Plants Questions 2021
B The pneumatic propulsion control system used on the fishing vessel to which you are assigned uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for lubrication upon reassembly? Illustration MO-0052 O-rings should be lubricated with penetrating oil. O-rings should be lubricated with a silicone-based grease. O-rings should be lubricated with desiccant powder. O-rings should not be lubricated by any means. New Motor Plants Questions 2021
A The main engines on your fishing industry line vessel are equipped with manual shutdown levers as shown in the illustration. What statement concerning manual shutdown is true? Illustration MO-0171 The manual shutdown lever is operated by means of a remote pull cable and uses the over speed trip mechanism to accomplish engine shutdown. The manual shutdown lever is operated by means of a remote pull cable and uses the governor fuel control linkage to accomplish engine shutdown. The manual shutdown lever is operated by means of the emergency trip reset lever and uses the governor fuel control linkage. The manual shutdown lever is operated by means of the over speed trip reset lever and uses the over speed trip mechanism to accomplish engine shutdown. New Motor Plants Questions 2021
B The main diesel propulsion engines on your uninspected fishing industry vessel are protected with a mechanical over speed trip mechanism similar to that shown in the illustration. Upon testing the trip setting, you discover that it is necessary to make an adjustment. Assuming that several adjustments may be necessary before the final setting is accurately achieved, what statement concerning adjustment is true? Illustration MO-0101 To adjust the over speed trip, the engine must be stopped AND the locknut must be retightened only after the final adjustment. To adjust the over speed trip, the engine must be stopped AND the locknut must be retightened after each adjustment. To adjust the over speed trip, the engine must be running AND the locknut must be retightened after each adjustment. To adjust the over speed trip, the engine must be running AND the locknut must be retightened only after the final adjustment. New Motor Plants Questions 2021
A The deck winch on your fishing industry seiner is fitted with a speed control governor of the type shown in the illustration. In addition to variable governed speed setting, what other group of settings is built into this particular governor? Illustration MO-0157 Engine idle speed (minimum governed speed) Engine speed limit (maximum governed speed) Engine idle speed (minimum governed speed) Engine speed limit (maximum governed speed) Engine load limit (maximum fuel delivery) Engine idle speed (minimum governed speed) Engine load limit (maximum fuel delivery) Engine load limit (maximum fuel delivery) Engine speed limit (maximum governed speed) New Motor Plants Questions 2021
D The thermal fluid heating oil system on your fishing industry factory ship is configured similarly to that shown in the illustration. What system component performs expansion and deaeration functions? Illustration MO-0198 1 2 4 5 New Motor Plants Questions 2021
C The water-tube natural-circulation steam boiler on your fishing trawler is equipped with soot blowers for maintaining heat transfer efficiency. Which of the following statements best describes the conditions that must be met before tubes can be safely blown using the soot blowers? The boiler draft must be increased AND the boiler fires must be secured before tubes can be safely blown. The boiler draft must be decreased AND the boiler fires must be secured before tubes can be safely blown. The boiler draft must be increased AND the boiler fires must be lit before tubes can be safely blown. The boiler draft must be decreased AND the boiler fires must be lit before tubes can be safely blown. New Motor Plants Questions 2021
C When cleaning burner atomizers associated with an oil-fired auxiliary boiler fitted on your fishery research vessel, which of the following metals would be recommended to use in fabricating a tool for the purposes of carbon removal? Titanium Tungsten Copper Chromoly steel New Motor Plants Questions 2021
A Valve lash or clearance refers to the __________. clearance between the top of the valve stem and the valve lifting mechanism. compression force of the valve springs clearance between the valve seat inserts and the valve head fuel injection cam profile New Motor Plants Questions 2021
C Due to environmental and safety concerns, the diesel engine cooling water system on your vessel is treated with propylene glycol for protection against freezing. According to the illustration, what would be the limit of protection if 40 pints of propylene glycol are used in treating a cooling water system with a volumetric capacity of 10 gallons? Illustration MO-0209 10F -6F -30F -53F New Motor Plants Questions 2021
A In a closed, re-circulating fresh water cooling system used for the main engines on your vessel, what function would chemical treatment with molybdate primarily perform? Corrosion inhibition. Freezing point depression. Boiling point elevation. Biological growth inhibition. New Motor Plants Questions 2021
B The vessel's owners have issued orders to reduce a motor vessel's speed to achieve a 10% reduction of fuel, for an extended period of time. As the senior engineer on board, what action should you take? Slow down to the requested fuel consumption reduction and proceed as such until further notice. Request owner to provide the vessel with engine manufacturer's slow speed steaming fuel injector nozzles. Reduce the engine RPM until a 10% reduction of consumption is achieved regardless of engine combustion efficiency. Re-time the engine to advance the fuel injection to maintain combustion efficiency. New Motor Plants Questions 2021
B An auxiliary diesel engine on your towboat is equipped with an electric starting motor such as is shown in the illustration. For what reason is there a significant gap in distance between the start solenoid plunger (C) and the rod that is used to close the starter motor contacts. Illustration MO-0051 Upon starter solenoid coil energization, this gap delays the engagement of the pinion to the flywheel ring gear until after the starter motor contacts close. Upon starter solenoid coil energization, this gap delays the closure of the starter motor contacts until after engagement of the pinion to the flywheel ring gear. Upon starter solenoid coil energization, this gap compensates for starter motor armature reaction to minimize arcing at the brushes. Upon starter solenoid coil energization, this gap prevents chattering and associated arcing of the starter motor contacts. New Motor Plants Questions 2021
D The main engines on your harbor tug utilize a starting system with two air-start motors similar to that shown in the illustration. Upon pushing the start button, the solenoid air valve energizes open, but the air start relay valve fails to receive pilot air, and thus the starter motors and engine fail to rotate. Which of the listed conditions would most likely be the cause of the failure to start? Illustration MO-0200 The upper pinion fails to retract, which in turn does not allow the lower pinion to retract. Because retraction of both pinions is required to supply air to the air-start motors, the engine does not start. The upper pinion fails to engage, which in turn does not allow the lower pinion to engage. Because engagement of both pinions is required to supply air to the air-start motors, the engine does not start. The lower pinion fails to retract, which in turn does not allow the upper pinion to retract. Because retraction of both pinions is required to supply air to the air-start motors, the engine does not start. The lower pinion fails to engage, which in turn does not allow the upper pinion to engage. Because engagement of both pinions is required to supply air to the air-start motors, the engine does not start. New Motor Plants Questions 2021
B The diesel fuels burned in auxiliary and main diesel engines of tugboats operating in harbor areas are required to meet certain specifications. Among these are limits of certain contaminants to limit atmospheric emissions to acceptable levels. Which of the following soluble contaminants is applicable? Asphaltenes Sulfur Total sediment Water New Motor Plants Questions 2021
D The tractor tug to which you are assigned has diesel generators fitted with multi-plunger pumps with the metering principle as shown in the illustration. What statement is true concerning this injection pump type? Illustration MO-0145 As the load changes, the beginning of injection is constant, and the ending of injection is constant. As the load changes, the beginning of injection is variable, and the ending of injection is constant. As the load changes, the beginning of injection is variable, and the ending of injection is variable. As the load changes, the beginning of injection is constant, and the ending of injection is variable. New Motor Plants Questions 2021
D The main propulsion diesel engines on your ship-docking tug are fitted with conventional hydraulically operated injector nozzles of the orifice type. When testing an injector by performing a pop-test on an injector test stand, you observe no leakage prior to reaching the popping pressure, the pressure holds at just below the popping pressure, the actual popping pressure is within specification, but the spray pattern is distorted. What maintenance is required? The injector spindle and nozzle holder bore must be reconditioned or replaced. The injector needle valve and seat must be reconditioned or replaced. The injector spring compression must be readjusted or a broken spring replaced. The injector nozzle tip orifices must be reconditioned by cleaning or the tip replaced. New Motor Plants Questions 2021
D You suspect that a diesel generator set on your river push boat has a misfiring cylinder because the engine, although warm, is running roughly. The six-cylinder engine is fitted with a multi-plunger in- line high pressure fuel injection pump with hydraulically operated injector nozzles. When you slacken the high pressure fuel line fitting at No. 5 fuel injector nozzle, the engine continues to run roughly as before with no real change. Upon re-tightening the high pressure fuel line fitting, the engine begins and continues to run smoothly. What does this indicate? No. 5 cylinder was and continues to be misfiring. You have successfully located the misfiring cylinder. No. 5 cylinder was and continues to be firing properly. No. 1, No. 2, No. 3, or No. 4 cylinder is misfiring. No. 6 cylinder is firing properly. No. 5 cylinder was and continues to be firing properly. No. 6 cylinder is misfiring. No. 1, No. 2, No. 3, and No. 4 cylinders are all firing properly. No. 5 cylinder had been misfiring. You have successfully purged the air from the No. 5 cylinder high pressure fuel line, and the engine is no longer misfiring. New Motor Plants Questions 2021
A The towboat to which you are assigned has main diesel engines fitted with intake and exhaust systems as shown in the simplified illustration. What is the primary purpose of the intercooler? Illustration MO-0180 Increase the charge air density to increase the engine power output. Provide cooling to the turbocharger turbine. Provide cooling to the turbocharger blower. Eliminate the need for water jacketing of the exhaust receiver. New Motor Plants Questions 2021
C The diesel generator set drive engines on your river push boat are protected with heavy-duty oil bath air cleaners. The oil within these air cleaners should be periodically replaced in accordance with manufacturer recommendations. What statement best describes when it would be appropriate to deviate from the recommended frequency? Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. Replace the oil more frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil more frequently when the oil is unusually dirty or when it thickens. Replace the oil less frequently when the engine is exposed to dusty conditions (such as arc welding in the engine room), and replace the oil less frequently when the oil is unusually dirty or when it thickens. New Motor Plants Questions 2021
D The diesel engines on your tug are all protected with dry-type air filters. When changing filter elements what visual indication would cause you to suspect that the engine has been contaminated with dust as the result of improperly sealing of the filter element gasket? The "dirty" side of the air filter element is coated with dust. The "dirty" side of the air filter housing is coated with dust. The "clean" side of the air filter element is clean and free of dust. The "clean" side of the air filter element is streaked with dust. New Motor Plants Questions 2021
A The salvage tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. Assume that the typical cylinder exhaust temperature at 75% of maximum, continuous rated load is between 850 and 900 F. What will happen to the typical cylinder exhaust temperature when the load is increased to 100% of maximum continuous rated load? Illustration MO-0076 The temperature will increase. The temperature will not change. The temperature will decrease. The temperature will change, but in either direction. New Motor Plants Questions 2021
D A main propulsion diesel engine on your towing vessel produces gray to black smoke under virtually all load conditions as observed at the stack. The heavier the load on the engine, the darker the smoke becomes. What condition would most likely account for this? Leaking exhaust manifold cooling water jackets. Excessively worn exhaust valve guides. Leaking exhaust piping expansion joints. Excessively restricted exhaust silencer/muffler. New Motor Plants Questions 2021
B The fresh water cooling systems serving the main engines on your harbor tug are arranged as shown in the illustration. If the fresh water thermostatic control valve fails in the position where 100% of the flow from flange "A" is permanently ported to flange "B" and flange "C" is permanently blocked, while starting and warming the engine with no load, what would be the resulting warm up time period? Illustration MO-0137 With no load, it is not possible to describe the time frame required to warm up the engine. With no load, the engine would require a relatively normal time frame to warm up. With no load, the engine would require a much longer than normal time frame to warm up. With no load, the engine would require a much shorter than normal time frame to warm up. New Motor Plants Questions 2021
C The lubricating oil system supporting the main propulsion reduction gear on the ship-docking tug to which you are assigned is fitted with a lube oil strainer as shown in the illustration. What strainer attribute will dictate the degree of filtration in terms of the particle size capable of being filtered? Illustration MO-0057 The number of discs in the disc-stack making up the straining element. The length of the oil sump enclosing the straining element. Vertical spacing between the metal discs as determined by the thickness of the cleaner blades. The dimensions of the triangular oil passages in each disc conveying the strained oil upward. New Motor Plants Questions 2021
A The escort tug to which you are assigned is fitted with hydraulic clutches similar to that shown in the illustration. If the time required for the clutch to disengage is unacceptably long, which of the following conditions would most likely be responsible for this? Illustration MO-0089 Solid contaminants are present in the hydraulic fluid. Clutch operating fluid is maintained at too low a temperature. Clutch operating fluid is maintained at too high a temperature. Fluid clutch sump level maintained at too high a level. New Motor Plants Questions 2021
A The main engines on your articulated tug-barge unit are equipped with over speed trip devices as shown in the illustration. What statement concerning the operation of the over speed trip is true? Illustration MO-0171 The overspeed trip senses centrifugal force proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The overspeed trip senses centrifugal force proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. The overspeed trip senses oil pressure proportional to engine speed and shuts the engine down at a pre-determined, specified maximum speed setting. The overspeed trip senses oil pressure proportional to engine speed and limits the engine speed to the rated speed, while allowing the engine to continue to run at the rated speed. New Motor Plants Questions 2021
B You are observing the flame condition on an oil-fired auxiliary boiler installed on your coast-wise tug through an observation window peephole. The flame is a reddish color accompanied by a noticeably panting/pulsating furnace. What would be the correlating color of the gases exhausting from the stack under these conditions? White smoke. Dense black smoke. Light brown haze. Clear stack. New Motor Plants Questions 2021
C The harbor tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illustration. What type of turbo-charging configuration is used? Illustration MO-0076 Constant pressure turbo-charging. Boost-controlled turbo-charging. Pulse turbo-charging. 2-stage turbo-charging. New Motor Plants Questions 2021
B You are preparing to change the oil of the speed control governor on one of the main propulsion diesel engines on your towing vessel. What statement is true concerning the draining and flushing procedures? The governor oil should be drained while the oil is cold and the governor should be flushed with the heaviest grade of the same type of oil. The governor oil should be drained while the oil is hot and the governor should be flushed with the lightest grade of the same type of oil. The governor oil should be drained while the oil is hot and the governor should be flushed with the heaviest grade of the same type of oil. The governor oil should be drained while the oil is cold and the governor should be flushed with the lightest grade of the same type of oil. New Motor Plants Questions 2021
C The pneumatic propulsion control system used on your river pushboat uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper technique? Illustration MO-0052 Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be washed with soap and water. Rubber parts such as the diaphragm should be cleaned with non-flammable solvent, and metal parts such as the valve discs and seats should be washed with soap and water. Rubber parts such as the diaphragm should be washed with soap and water, and metal parts such as the valve discs and seats should be cleaned with non-flammable solvent. Rubber parts such as the diaphragm and metal parts such as the valve discs and seats should all be cleaned with non-flammable solvent. New Motor Plants Questions 2021
A You are serving as a designated duty engineer onboard a harbor tug equipped with main propulsion diesel engines of the type shown in the illustration. What scavenging flow pattern is used in this engine type? Illustration MO-0227 Uniflow Return-flow Loop Cross-flow New Motor Plants Questions 2021
D The main propulsion diesel engines fitted on your salvage tug are started with compressed air using the system illustrated. What is the starting method used with this system? Illustration MO-0199 Hydraulic cranking motor(s) with air over hydraulics Direct air admission with air start distributor Direct air admission with cam actuated air start valves. Air cranking motor(s) New Motor Plants Questions 2021
B The main propulsion engines onboard your tractor tug use a lubricating oil system as shown in the illustration. What item number represents the lubricating oil filter? Illustration MO-0183 2 5 10 12 New Motor Plants Questions 2021
C The harbor tug to which you are assigned has diesel generators fitted with intake and exhaust systems that includes the device as shown in figure "A" of the illustration. What is the name of this device? Illustration MO-0178 Exhaust gas-driven turbocharger Engine-driven vane type rotary blower Engine-driven lobe type rotary blower Electric motor-driven centrifugal blower New Motor Plants Questions 2021
B Your salvage tug is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. Which heat exchanger/cooler application and aspect would most likely require periodic mechanical cleaning with a specially designed brush? Illustration MO-0137 The outside of the tubes of the RW/FW heat exchanger. The inside of the tubes of the RW/FW heat exchanger. The outside of the tubes of the lube oil cooler. The inside of the tubes of the lube oil cooler. New Motor Plants Questions 2021
D The ship-docking tug to which you are assigned is fitted with main propulsion engines driving through pneumatic airflex clutches as shown in the illustration. What statement is true concerning this type of clutch? Illustration MO-0141 The clutch is a constricting type clutch and constricts to engage against the clutch gland when inflated. The clutch is an expanding type clutch and expands to engage against the clutch drum when inflated. The clutch is an expanding type clutch and expands to engage against the clutch gland when inflated. The clutch is a constricting type clutch and constricts to engage against the clutch drum when inflated. New Motor Plants Questions 2021
B Which of the following conditions best describes the reason for performing a bottom blow on an auxiliary steam boiler as fitted on your harbor tug? Priming and carryover. Sludge removal. High water. Excess chemicals and/or salinity. New Motor Plants Questions 2021
D In accordance with 46 CFR Subchapter F, what device is used as a safety feature for the unit shown in the illustration? Illustration MO-0116 Spring clutch Overrunning clutch Pneumatic three position valve Electrical limit switch New Motor Plants Questions 2021
D Crankcase explosions in propulsion diesel engines can result from which of the following? the splashing of lubrication oil by the crankshaft the dilution of crankcase oil with particles of combustion broken fuel lines spraying oil on the crankcase the ignition of vaporized lube oil in the crankcase New Motor Plants Questions 2021
C Prior to starting an auxiliary diesel engine on your vessel, the crankcase oil level must be checked. At what checked level would you be required to add make-up oil? When the oil level drops to between the ADD and FULL marks on the dipstick. When the oil level drops below the FULL mark on the dipstick. When the oil level drops below the ADD mark on the dipstick. When the oil level drops to where it is no longer visible on the dipstick. New Motor Plants Questions 2021
C The component labeled as part No.20 in the illustration is used to __________. Illustration MO-0050 meter the amount of oil flow to the cylinder lubricating quill adjust the timing of the cylinder lubricating oil to the cylinder indicate the quantity of oil flow to the cylinder prevent the backflow of oil and combustion gases New Motor Plants Questions 2021
D The vessel to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the attached fuel oil pump and the hand priming fuel oil pump from discharging through the other, what other purpose do the anti-flood check valves serve? Illustration MO-0152 They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located below the engine. They prevent backflow of fuel from the engine to the day tank when the engine is running and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shut down and when the day tank is located above the engine. They prevent backflow of fuel from the engine to the day tank when the engine is shut down and when the day tank is located below the engine. New Motor Plants Questions 2021
D The vessel to which you are assigned is fitted with a diesel driven generator engine as shown in the illustration. What statement is true in terms of the combustion chamber design? Illustration MO-0006 The engine uses turbulence chambers with a hemispherical fire-deck. The engine uses an open type combustion chamber with a hemispherical fire-deck. The engine uses pre-combustion chambers with a flat fire-deck. The engine uses an open type combustion chamber with a flat fire-deck. New Motor Plants Questions 2021
C What is the purpose of water transducers used with the separator shown in the illustration? Illustration MO-0127 A transducer is located inside the separator to assist in adjustment of the water and oil interface. A transducer is located in the dirty oil inlet to measure the amount of water coming into the separator with the process fluid. A transducer is located in the clean oil outlet to sense water content in the oil. All of the above are correct. New Motor Plants Questions 2021
B The hunting of a diesel engine may be caused by which of the following? Poor quality fuel. Excessive governor control. Fluctuations in load. Excessive speed droop. New Motor Plants Questions 2021
C The vessel to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in the illustration. What statement is true concerning the valves (items #1 and #9)? Illustration MO-0176 Both items #1 and #9 are intake valves. Item #1 is an exhaust valve and item #9 is an intake valve. Item #1 is an intake valve and item #9 is an exhaust valve. Both items #1 and #9 are exhaust valves. New Motor Plants Questions 2021
C Lube oil pumps taking suction from the sump of most small marine engines are usually __________. diaphragm type centrifugal type positive displacement type eductor type Auxiliary Engines
B Auxiliary diesel engines can be automatically shut down as a result of __________. low lube oil temperature low lube oil pressure high exhaust temperature high cooling water pressure Auxiliary Engines
C When a generator diesel engine is operated at partial load, as compared to full load, a decrease will occur in the average __________. piston speed fuel injection pressure combustion pressure on the power stroke compression pressure on the compression stroke Auxiliary Engines
A An auxiliary diesel generator continues to run after you try to shut down. Your next course of action should be to __________. block the flow of air supply to the engine engage the jacking gear secure the lube oil pump decrease control air pressure Auxiliary Engines
D What is the best way of stopping an over speeding diesel engine? Disconnect the battery cables from the starting motor. Drain the hydraulic fluid from the governor sump. Block the flow of cooling air to the radiator. Secure the fuel supply and block the air intake Auxiliary Engines
C Which of the listed conditions will result in the failure of an auxiliary diesel engine to shut down? Supplying high temperature inlet air. Maintaining a high exhaust back pressure. Lube oil entering in the air intake manifold. Carbon buildup on the over speed pawl. Auxiliary Engines
A In the auxiliary diesel engine, shown in the illustration, the __________. Illustration MO-0006 governor is linked to the fuel injection pump by vertical linkage explosion relief doors are clearly visible on both sides of the crankcase camshaft rotates at the same speed as the crankshaft engine oil filter is outboard of the electric starter Auxiliary Engines
B Which of the following test indicators should be considered the most significant factor in determining as to whether or not a diesel generator's lube oil should be drained and renewed? The oil appears black in color. An extremely high neutralization number. An extremely low precipitation number. An increase in flash point. Auxiliary Engines
B The valve cam slope angle determines the __________. engine torque characteristics acceleration rate of valve opening and closing engine fuel efficiency diameter of intake and exhaust valves Auxiliary Engines
D When two cams of the same diameter, one with tangential flanks and the other with convex flanks are compared, the cam with tangential flanks will cause___________. less valve seat wear greater valve lift more abrupt valve action less valve gear wear Auxiliary Engines
C The part labeled "G", as shown in the illustration, is a __________. Illustration MO-0040 connecting rod cap bearing shell connecting rod bushing piston bushing Auxiliary Engines
C In diesel engines, hydraulic valve lifters are used to __________. obtain greater valve lift create longer valve duration reduce valve gear pounding increase valve operating lash Auxiliary Engines
D The intake and exhaust valves used in a diesel engine are returned to their seats by __________. combustion pressure push rod pressure exhaust pressure spring force Auxiliary Engines
A Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________. bleed off all hydraulic pressure from the system place all control levers in the 'HOLD' position block all hydraulic hoses using high pressure covers ensure that the hydraulic fluid reservoir is full Auxiliary Engines
A The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by __________. knurling the piston skirt surface increasing the dimensions of the ring land grooves building up the piston skirt with a liquid epoxy material and then remachining turning down the piston skirt to concentric values Auxiliary Engines
A In an auxiliary diesel engine, one reason for knurling the piston skirt is to __________. improve skirt lubrication transmit forces evenly allow for heat expansion improve the piston seal Auxiliary Engines
A A four-stroke cycle auxiliary diesel engine fuel cam has shifted from its original position
during maintenance. To ensure correct timing of the fuel pump, the intake and exhaust valves should be in what position when approaching top dead center for injection?
Intake and exhaust valves closed Exhaust valve open, intake valve closed Intake and exhaust valves open Intake valve open, exhaust closed Auxiliary Engines
A If an auxiliary diesel engine equipped with an electric starting system cranks very slowly after repeated attempts to start, the cause could be a/an __________. overheated motor windings ring gear with broken teeth low lube oil viscosity low compression pressure Auxiliary Engines
B In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive __________. cooling water temperatures lube oil consumption exhaust pressure exhaust temperatures Auxiliary Engines
D On small diesel engines, a noticeable decrease in the time interval between the replacement of the lube filter cartridge indicates __________. excessive oil temperature excessive oil pressure dirty air filter piston ring blow-by Auxiliary Engines
A A diesel engine may fail to start when being cranked, due to __________. insufficient compression high cetane number low lube oil viscosity high lube oil pressure Auxiliary Engines
C High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by __________. plugged fuel nozzle holes excessive compression pressure engine overload low combustion temperature Auxiliary Engines
A One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to __________. adjust the fuel rack retard fuel injector timing reduce fuel booster pump pressure increase scavenge air pressure Auxiliary Engines