单项选择题
A.the expansion ratio will decrease B.combustion will be slowed down C.thermal efficiency will decrease D.thermal efficiency will increase
If a used lube oil analysis indicates excessive fuel di...
单项选择题If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）
A.changed B.centrifuged C.filtered D.settled
How are the pressure and temperature affected in a dies...
单项选择题How are the pressure and temperature affected in a diesel engine cylinder during compression?（）
A.Pressure and temperature decrease B.Pressure and temperature increase C.Pressure decreases and temperature increases D.Pressure increases and temperature decreases
A diesel engine is warmed up and white vapor is in the ...
单项选择题A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）
A.excessive cylinder lubrication B.a lugging engine C.a leaking cylinder liner D.overloading of one cylinder
