单项选择题
A.the size of the holes in the fuel nozzle B.timing of the pump C.supply pressure to the pump D.shape of the combustion chamber
The camshaft on a four-stroke/cycle diesel engine provi...
单项选择题The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.
A.fuel injectors B.exhaust valves C.intake valves D.all of the above
A two-stroke diesel engine exhaust temperature will be ...
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longer
A.(1) only B.(2) only C.both (1) and (2) D.neither (1) nor (2)
If the chemical analysis of a lube oil sample taken fro...
单项选择题If the chemical analysis of a lube oil sample taken from a diesel engine indicates an increased neutralization number, the （）.
A.acidity has increased B.viscosity has decreased C.demulsibility has improved D.foaming is guaranteed to occur
