Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG Motor Plants & Auxiliary Boilers (Set 14)

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Question 1 of 30

After following the prescribed procedures to measure the thrust bearing clearance shown in the illustration, the distance "F" is determined to be 200 mm, and 'f1' is 2.3 mm. Which of the following statements describes the condition indicated by these dimensions? Illustration MO-0121

Browse Questions in Set 14

30 MCQs

#1 After following the prescribed procedures to measure the thrust bearing clearance shown in the illustration, the distance "F" is determined to be 200 mm, and 'f1' is 2.3 mm. Which of the following statements describes the condition indicated by these dimensions? Illustration MO-0121 #2 Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________. #3 When a nozzle tester is being used to test a "closed" type fuel injection nozzle, a clogged nozzle orifice will be indicated by a __________. #4 Which of the fuel nozzles listed requires the LEAST maintenance? #5 When running a large, dual fuel, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching from heavy fuel oil to diesel oil? #6 Air is normally bled from a diesel engine fuel system by __________. #7 The spray holes in diesel engine fuel valves should be cleaned using carbon solvent and __________. #8 The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in __________. #9 After a long period of operation, a wear ridge, caused by piston ring action, will develop near the top of the cylinder liner. This ridge must be removed during maintenance in order to prevent __________. #10 When a piston is removed from a diesel engine for maintenance, the piston should be examined for __________. #11 Excessive side clearance between a piston ring and its groove will cause the ring to __________. #12 If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to __________. #13 After removing the bowl hood of the device shown in the illustration, excessive quantities of sludge are visible. Which of the following statements represents the approach to rectify the situation? Illustration MO-0112 #14 When tightening the lock ring "G" of the device shown in the illustration, two events are simultaneously accomplished. Which of the following statements represents these events? Illustration MO-0112 #15 Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________. #16 The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by __________. #17 In an auxiliary diesel engine, one reason for knurling the piston skirt is to __________. #18 Decreasing the exhaust valve clearance of a diesel engine will cause the exhaust valve to open __________. #19 When inspecting the valve mechanism shown in the illustration, normal maintenance would include __________. Illustration MO-0074 #20 Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074 #21 If sludge accumulates on the underside of a diesel engine piston, it will __________. #22 Before being shut down, a diesel engine should idle a few minutes in order to __________. #23 If the relief valve on a diesel engine cylinder lifts, the cause could be due to __________. #24 The diesel engine shown in the illustration can be fitted with a pyrometer at each exhaust elbow. If one of the cylinder pyrometers is reading significantly higher than the others, which of the following should be your FIRST action? Illustration MO-0005 #25 White smoke issuing from the exhaust of an auxiliary diesel engine could mean __________. #26 When running a large, dual fuel, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching from heavy fuel oil to diesel oil? #27 When restarting a heavy fuel diesel engine that has been stopped for some time, the engineer should __________. #28 One cause of diesel engine fuel ignition delay is __________. #29 When a fuel injection nozzle overheats, which of the problems listed can be expected? #30 High cylinder firing pressure, accompanied by low exhaust temperature, can result from __________.

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