單項選擇題

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

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單項選擇題

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

單項選擇題

The sludge tank installed in the diesel engine room is used to collect（）
Ⅰ.sludge from the fuel oil settling tanks ad centrifuge
Ⅱ.water that has been collected in the settling tank

A.Ⅰonly
B.Ⅱ only
C.bothⅠand Ⅱ
D.neitherⅠor Ⅱ

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

你可能感興趣的試題

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

The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tank

The sludge tank installed in the diesel engine room is used to collect（）
Ⅰ.sludge from the fuel oil settling tanks ad centrifuge
Ⅱ.water that has been collected in the settling tank