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

USCG Motor Plants & Auxiliary Boilers (Set 3)

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Question 1 of 30

Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because __________.

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30 MCQs

#1 Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because __________. #2 When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by __________. #3 The purpose of the engine-driven hydraulic pump in an auxiliary diesel engine hydraulic starting system is to __________. #4 Auxiliary diesel engine electric starting motors use __________. #5 Starting systems for large, direct reversing, main propulsion diesel engines are usually __________. #6 In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without air starting valves fire first because the __________. #7 The most common instrument used to measure diesel engine exhaust pressure is the __________. #8 In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in __________. #9 One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the __________. #10 Exhaust pipes for separate main propulsion diesel engines can be combined only when __________. #11 The exhaust system for a turbocharged diesel engine functions to __________. #12 In a coil-type forced circulation auxiliary water-tube boiler, __________. #13 Which of the following statements concerning fire-tube boilers is correct? #14 Bottom blow valves are installed on auxiliary water-tube boilers to __________. #15 The purpose of try-cocks used on an auxiliary boiler is to __________. #16 An exhaust gas bypass is installed on a waste heat boiler in order to __________. #17 The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust __________. #18 Which of the following statements concerning fire-tube boilers is correct? #19 The tube sheets installed in a fire-tube auxiliary boiler are normally connected by __________. #20 Fusible plugs are installed in fire-tube boilers to __________. #21 Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are __________. #22 The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent __________. #23 The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and __________. #24 A variable capacity, pressure atomizing, fuel oil burner functions to __________. #25 The solenoid valves in the fuel oil supply line to an automatically fired auxiliary boiler, are automatically closed by __________. #26 Control of the fuel oil metering valve in an automatically fired auxiliary boiler is accomplished by a __________. #27 If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be __________. #28 If the raw water supply pressure for a diesel engine cooling system is below normal, you should check for a __________. #29 Antifreeze solutions containing ethylene glycol, should not be mixed with corrosion protection oils, as the resultant mixture __________. #30 In a closed cooling water system, which of the following problems can cause the water pressure to fluctuate?

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