单项选择题

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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单项选择题

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

单项选择题

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

单项选择题

A.before TDC and close after BDC
B.after TDC and close after BDC
C.before TDC and close before BDC
D.after TDC and close before BDC