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

USCG Motor Plants & Auxiliary Boilers (Set 16)

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Question 1 of 30

Governor hunting is caused by __________.

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30 MCQs

#1 Governor hunting is caused by __________. #2 The hunting of a diesel engine may be caused by __________. #3 If the speeder spring of a main propulsion diesel engine governor breaks while operating at full load, the engine RPM will __________. #4 A propulsion engine, using the speed control circuit shown in the illustration, fails to function at speeds lower than the low end of the critical speed range. Which of the following statements describes what should be done to correct this malfunction? Illustration MO-0114 #5 Corrosion and grooving on the blading of an exhaust driven turbocharger is caused by certain components of residual fuel oils. These components are vanadium, sodium, and __________. #6 Excessive mechanical and pulsating vibrations developed in a main propulsion diesel engine may be more likely to cause damage to an attached __________. #7 Before any work is to be carried out on a burner in an automatically fired auxiliary boiler, you should always __________. #8 The starter control valve in the hydraulic system shown in the illustration is malfunctioning. Before removing the valve, you must first __________. Illustration MO-0049 #9 Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve? #10 When a nozzle tester is used to check the spray pattern of a diesel fuel injection nozzle, which of the following statements is true? #11 The principal hazard to personnel when using a diesel engine fuel nozzle tester is _______. #12 Which of the following precautions should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? #13 In the illustrated engine, the main camshaft controls the timing of which of the following components? Illustration MO-0003 #14 The lower end of the piston rod, shown in the illustration, is fitted into the __________. Illustration MO-0003 #15 In what figure of the illustration does the crosshead experience the greatest side thrust? Illustration MO-0025 #16 Piston cooling fins are located __________. #17 During main engine performance testing it is noticed that the firing pressure of one cylinder is higher than the average, but cylinder compression pressure is normal. Which of the following would most likely be the cause? #18 During main engine performance testing it is noticed that one cylinder has firing and compression pressures lower than average. Which of the following would most likely be the cause? #19 Worn diesel engine intake valve guides can result in __________. #20 If a valve seat insert, similar to that shown in the illustration is cracked, this may be indicated by __________. Illustration MO-0043 #21 Low compression pressure in a diesel engine can be caused by __________. #22 When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will be indicated? #23 The ring lands on a large, low-speed, main propulsion diesel engine piston may crack due to __________. #24 The most practical way of detecting an overload in one cylinder of an operating large, low-speed, main propulsion diesel engine is to __________. #25 One method of determining crankshaft misalignment is by __________. #26 A main propulsion diesel engine crankshaft bearing lacking sufficient 'crush', will __________. #27 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___________. #28 In diesel engines, hydraulic valve lifters are used to __________. #29 Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________. #30 The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by __________.

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