单项选择题
A.being compressed B.to be pumped up C.is pressurized D.are built up
As for a diesel engine, lack of combustion air may be d...
单项选择题As for a diesel engine, lack of combustion air may be due to （）.
A.fouling turbine B.fuel pump faults C.lubrication failure D.excessive cooling
As a heat engine,（） energy is the source of power by wh...
单项选择题As a heat engine,（） energy is the source of power by which the diesel engine can be operated.
A.electric B.heat C.mechanical D.exhaust
An overspeed safety device is usually fitted to a gener...
单项选择题An overspeed safety device is usually fitted to a generator engine for （） in the event of overspeed.
A.cutting power off the engine B.increasing the fuel pump setting C.braking the crankshaft D.stabilizing the ship speed
