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單項(xiàng)選擇題

Low compression pressure in a diesel engine is caused by（）

A.low water in the expansion tank
B.improperly seated valves
C.low fuel oil pressure
D.worn or broken cylinder liner sealing rings

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單項(xiàng)選擇題

A pyrometer is an instrument used to measure the temperature of the diesel engine（）

A.exhaust
B.fuel oil
C.cooling water
D.cylinder liner

單項(xiàng)選擇題

Low compression pressure in a diesel engine can be caused by（）

A.improperly seating intake valves
B.leaking cylinder liner seal rings
C.late fuel injection timing
D.carbon deposits on the piston

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