单项选择题
It is easier to replace a dry cylinder liner than a wet one because（）
A.of the thin wall thickness
B.honing makes it easier to maintain the desired oil ilm
C.water seals are not required
D.it fits more loosely due to a decrease in heat transfer through the composite wall
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相关考题
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单项选择题
Which of the turbo-charging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure?（）
A.Constant pressure
B.Pulse
C.constant velocity
D.Axial flow -
单项选择题
Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?（）
A.Fuel injection timing will change
B.Nozzle operation will be unaffected
C.Fuel will leak into the drain line
D.Fuel will not be delivered -
单项选择题
A dry-type exhaust muffler clogged with soot, will cause（）
A.low exhaust temperature
B.loss of engine power
C.burned intake valves
D.engine racing
