單項(xiàng)選擇題

If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）

A.excessive ring action
B.excessive ring temperature
C.improper ring rotation
D.excessive ring face wear

你可能感興趣的試題

單項(xiàng)選擇題

Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）

A.higher speed required
B.flywheel-effect
C.lower starting temperatures
D.higher compression pressures

單項(xiàng)選擇題

The size of the exhaust valve opening is （）

A.most critical in a four-stroke cycle diesel engine
B.most critical in a two-stroke/cycle diesel engine
C.most critical in a four-stroke/cycle diesel engine if it is turbocharged
D.of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine