单项选择题
A.Lubrication B.Cooling C.Fuel D.Electric ignition
When the normal compression ratio of a diesel engine is...
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
In a two-stroke/cycle diesel engine, the exhaust gases ...
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
If a diesel engine driving a generator turns over freel...
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
