你可能感興趣的試題

單項(xiàng)選擇題

Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）

A.Lube oil is diluted and its viscosity is reduced
B.Sulfuric acid is formed
C.Bearings become pitted ad immediately fail
D.Valve stems develop sludge deposits

單項(xiàng)選擇題

If a few injector spray holes become plugged, the result could be （）

A.excessive surging at governed speed
B.combustion knock under load
C.poor fuel combustion
D.all of the above

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