单项选择题
Diesel engine piston seizure can be caused by （）
A.poor cooling of cylinder walls
B.improper cooling of the piston
C.insufficient piston lubrication
D.all of the above
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相关考题
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单项选择题
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）
A.natural aspiration
B.masked intake valves
C.air cells
D.scavenging air -
单项选择题
Improperly fitted piston rings in a diesel engine can cause（）
A.excessive lube oil consumption
B.lower than normal lube oil temperature
C.higher than normal exhaust back pressure
D.excessive crankshaft end play -
单项选择题
Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）
A.twice as large as with a cast iron piston
B.the same size as with a cast iron piston
C.half as large as with a cast iron piston
D.the same size as the crown of an aluminum piston
