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單項選擇題

Low compression in a diesel engine could be caused by（）

A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure

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單項選擇題

The most common instrument used to measure diesel engine exhaust pressure is the （）

A.pyrometer
B.bourdon gauge
C.pneumercator
D.manometer

單項選擇題

A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）

A.a leaking fuel injector nozzle
B.a clogged air filter
C.excessively early fuel injection
D.malfunctioning valves

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