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單項(xiàng)選擇題

Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）

A.later and close sooner
B.sooner and close later
C.sooner and close sooner
D.later and close later

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單項(xiàng)選擇題

Pyrometers commonly found on diesel engine exhaust systems, consist of（）

A.pyrostats and a voltmeter
B.a gas-filled bellows, a tube and a pressure gauge
C.thermocouples and a voltmeter
D.ammeters and thermocouples

單項(xiàng)選擇題

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

A.clogged coolant passages
B.a leaking cylinder head gasket
C.low fuel oil pressure
D.worn or broken cylinder liner sealing rings