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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

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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

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

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