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

USCG Motor Plants & Auxiliary Boilers (Set 19)

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Question 1 of 30

Casing drains may be required on a waste heat boiler gas passage side to __________.

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30 MCQs

#1 Casing drains may be required on a waste heat boiler gas passage side to __________. #2 Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are __________. #3 The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent __________. #4 The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and __________. #5 Which of the following statements describes how the fuel oil enters the whirling chambers of the sprayer plates used in a auxiliary boiler return flow fuel oil system? #6 The solenoid valves in the fuel oil supply line to an automatically fired auxiliary boiler, are automatically closed by __________. #7 A variable capacity, pressure atomizing, fuel oil burner functions to __________. #8 When the steam pressure drops below a set value on an automatically fired auxiliary boiler, fitted with rotary cup atomizers, the combustion control system will __________. #9 Control of the fuel oil metering valve in an automatically fired auxiliary boiler is accomplished by a __________. #10 Burner ignition failure in an automatically fired auxiliary boiler would be caused by __________. #11 In the event of a flame failure in an auxiliary water-tube boiler, you must __________. #12 A feed pump for an auxiliary boiler might lose suction if the __________. #13 A safety valve on an auxiliary boiler simmers constantly and cannot be stopped by several quick blow-offs using the hand relieving gear. The problem may be __________. #14 Before any work is done on a burner in an automatically fired auxiliary boiler, you should always __________. #15 Before any work is to be carried out on a burner in an automatically fired auxiliary boiler, you should always __________. #16 Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve? #17 If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________. #18 The principal hazard to personnel when using a diesel engine fuel nozzle tester is _______. #19 Which of the following precautions should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? #20 Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? #21 If a tube ruptures in a water-tube auxiliary boiler due to low water, you should ___________. #22 If a crankcase explosion due to a hot spot were to occur, the size of the explosion is dependent on which of the following? #23 Which of the following oil mist to air ratios would most likely lead to the most severe crankcase explosion? #24 In the event of a crankcase rich oil mist to air mixture explosion, where the doors are blown off the engine, which of the following may occur after the initial explosion? #25 After stopping a diesel engine with a high main bearing temperature, what is the time one needs to wait before a diesel engine crankcase can be opened? #26 Which of the following is one of the ways to prevent a scavenging fire on a slow speed diesel engine? #27 If a scavenging air space fire occurs on a slow speed diesel engine and the engine is stopped, which of the following should be done to prevent distortion due to heat? #28 Which of the following would indicate a scavenging air fire in a slow speed diesel engine? #29 If a diesel engine were running at 20% overload with a smoky exhaust, you should __________. #30 In accordance with Coast Guard Regulations (46 CFR Part 112), which of the listed starting aids is acceptable for use with the emergency diesel generator?

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