單項(xiàng)選擇題Low compression in a diesel engine could be caused by()

A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure


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1.單項(xiàng)選擇題The most common instrument used to measure diesel engine exhaust pressure is the ()

A.pyrometer
B.bourdon gauge
C.pneumercator
D.manometer

2.單項(xiàng)選擇題A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by()

A.a leaking fuel injector nozzle
B.a clogged air filter
C.excessively early fuel injection
D.malfunctioning valves

3.單項(xiàng)選擇題One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the ()

A.crankcase
B.piston
C.cylinder liner
D.crank cheek

4.單項(xiàng)選擇題The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to()

A.discharge exhaust gases and smoke
B.furnish energy to the turbocharger
C.reduce engine room noise
D.all of the above

5.單項(xiàng)選擇題Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of ()

A.residual carbon deposits
B.lube oil viscosity breakdown
C.uneven heat expansion of the rings
D.uneven heat expansion of the piston

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