单项选择题
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
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相关考题
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单项选择题
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 -
单项选择题
In a four-stroke cycle diesel engine the intake valves open （）
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 -
单项选择题
Diesel engine air start system check valves are opened by （）
A.an air start cam
B.cylinder compression pressure
C.starting air pressure
D.valve springs
