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單項選擇題

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

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單項選擇題

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

單項選擇題

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

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