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

USCG Safety & Environmental Protection (Deck) (Set 32)

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Question 1 of 30

What is the function of wearing rings found on some centrifugal pumps?

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30 MCQs

#1 What is the function of wearing rings found on some centrifugal pumps? #2 A thrust block is designed to __________. #3 What quality of a diesel fuel is most significant for efficient combustion? #4 The brickwork surrounding the firebox of a boiler is known as __________. #5 What is NOT a function of the steam drum of a marine water-tube boiler? #6 A spark arrestor __________. #7 Diesel engines are considered safer than gasoline engines because __________. #8 What monitoring device best indicates the load being carried by a diesel engine? #9 A wobbling tail shaft is an indication of __________. #10 After an engine is started you should __________. #11 During fueling, all doors, hatches, and ports __________. #12 Lubricating oil should be changed on a heavy duty diesel engine when __________. #13 Generally speaking, the fuel injected into a marine diesel engine combustion chamber is ignited by __________. #14 How should you warm up a diesel engine that has not been run for some time? #15 How would the exhaust of a properly operating diesel engine appear? #16 What would white exhaust smoke from a diesel engine probably mean? #17 Each cylinder in a two cycle engine experiences combustion __________. #18 How does combustion air enter the cylinder of a two-cycle diesel engine? #19 What are the three basic types of engine starters? #20 The quickest method to stop a small diesel engine whose throttle or governor has become stuck open is to __________. #21 Most medium and slow speed diesels are started by what medium? #22 What condition will result in the automatic shutdown of a diesel engine? #23 The three conditions which cause engine shutdown are overspeed, low lube oil pressure, and __________. #24 If an engine shuts down due to high jacket water temperature, what action should be taken? #25 Diesel engines obtain combustion air through turbo chargers, blowers, or __________. #26 What is the purpose of the intake/exhaust valves in a diesel engine? #27 What is the best indication of the loading of a diesel engine? #28 All marine low-speed diesels are of what design? #29 All diesel engines are classified as __________. #30 Overspeed of the diesel engine driving an electric generator could cause __________.

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