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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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單項(xiàng)選擇題

During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the（）

A.piston skirt
B.pinion
C.crosshead
D.compression rings

單項(xiàng)選擇題

A pyrometer is an instrument commonly used to measure（）

A.cylinder pressure
B.flame intensity
C.exhaust gas temperature
D.crankshaft axial alignment

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