单项选择题
Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）
A.residual carbon deposits
B.lube oil viscosity breakdown
C.uneven heat expansion of the rings
D.uneven heat expansion of the piston
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相关考题
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单项选择题
A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）
A.one-half engine speed
B.the same as engine speed
C.twice engine speed
D.four times engine speed -
单项选择题
In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）
A.air intake
B.a fuel outlet
C.cooling water inlets
D.exhausting combustion gas -
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
