单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）
A.ignition lag
B.engine horsepower
C.lube oil system pressure
D.specific fuel consumption
