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單項選擇題

Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）

A.low loading of that cylinder
B.faulty combustion in that cylinder
C.sluggish piston ring action
D.excessive piston cooling

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單項選擇題

Engine coolant accumulating in the diesel engine lubricating oil can result from a （）

A.low oil pressure
B.high coolant pressure
C.leaking fuel injector
D.cracked cylinder head or liner

單項選擇題

The device used to limit engine torque at various engine speeds is called a （）

A.speed limiting governor
B.variable speed governor
C.constant speed governor
D.load limiting governor

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