单项选择题
When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）
A.overloading the engine
B.low exhaust valve lift
C.excessive cylinder cooling
D.insufficient mechanical clearance
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相关考题
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单项选择题
In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）
A.exhaust manifold
B.valve bridge
C.pressure of the fresh air charge
D.valve adjusting gear -
单项选择题
If a diesel engine driving a generator turns over freely but fails to fire properly, the cause could be （）
A.excessive compression pressure
B.air in the fuel lines
C.high fuel pressure
D.excessive load -
单项选择题
One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）
A.reduce lube oil temperature
B.raise exhaust temperature reduce
C.excessive heating of engine room
D.reduce load on cooling water pump
