单项选择题
An increase in crankcase pressure generally indicates（）
A.worn connecting rod bearings
B.worn engine cylinder liners
C.high cylinder firing pressure
D.stuck spring-loaded manhole covers
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相关考题
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单项选择题
Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
A.chromium plating piston rings
B.knurling the piston skirt
C.extended maximum power operation
D.applying load to a cold diesel engine -
单项选择题
If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）
A.liquid in the cylinder
B.low compression in the cylinder
C.high exhaust temperature
D.poor fuel penetration -
单项选择题
Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）
A.amount of scavenge air to the cylinder
B.quality of fuel injected
C.viscosity of the lube oil
D.compression ratio of the piston
