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

USCG Motor Plants & Auxiliary Boilers (Set 15)

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Question 1 of 30

In the common rail system, excessive pressure in the header may be caused by __________.

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30 MCQs

#1 In the common rail system, excessive pressure in the header may be caused by __________. #2 Surface irregularities, such as erosion and pitting on injection pump plungers, will __________. #3 While operating the fuel oil centrifuge shown in the illustration, the bowl fails to open for sludge ejection. The probable cause is that __________. Illustration MO-0012 #4 While operating the fuel oil centrifuge shown in the illustration, the fuel oil is being continuously ejected with the sludge and the seal water. The probable cause is the __________. Illustration MO-0012 #5 For a diesel engine, approximately how long can an electric starter motor be operated continuously before damage may begin to occur due to overheating? #6 On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________. #7 Which of the following conditions is most likely to occur if the electric starter motor pinion gear fails to disengage from the flywheel of a diesel engine after the engine has started? #8 When starting air is admitted, a diesel engine turns over very slowly without firing. The cause may be __________. #9 When an additional load is applied to a diesel engine which is using an inadequately inflated air bladder clutch unit, you can expect __________. #10 Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or __________. #11 The gear drive, shown in the illustration, can have the backlash determined best by using a __________. Illustration MO-0091 #12 What could cause the bypass valve in a full-flow lubrication system to open? #13 Lube oil in the fresh water cooling system of a diesel engine may result from a __________. #14 Which of the following effects will excessively cold lube oil have on the operation of a diesel engine? #15 A four-stroke cycle main propulsion diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperature. The reason for the failure could be __________. #16 Clogged or partially obstructed exhaust ports on a diesel engine can cause __________. #17 A diesel engine may be hard to start if the __________. #18 Combustion gas venting through the expansion tank can be caused by a __________. #19 Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinder. If the cooling water temperature from all cylinders begins to rise above normal, you should suspect __________. #20 A diesel engine cylinder head can crack as a result of __________. #21 Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by __________. #22 If there is a 'clicking' sound in the valve compartment of a diesel engine, the cause may be __________. #23 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 __________. #24 A diesel engine may fail to start when being cranked, due to __________. #25 High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by __________. #26 Crank web deflection readings will give a positive indication of __________. #27 Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to __________. #28 Excessive vibration from an auxiliary boiler could be caused by __________. #29 Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction? #30 If the operating speed of a diesel engine increases without an apparent change in the engine control settings, you may suspect a __________.

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