单项选择题
A.below 300 B.above 1200 C.between 300 to 1200 D.below 1200
The term （） refers to one complete sequence of operatio...
单项选择题The term （） refers to one complete sequence of operations required to produce power in an engine.
A.diesel engine B.stroke C.cycle D.compression ratio
The supercharger takes air out of the surrounding atmos...
单项选择题The supercharger takes air out of the surrounding atmosphere and then feeds it to the engine’s （）.
A.inlet valves B.exhaust valves C.emergency valves D.run-return valves
The successful operation of any engine or machine and （...
单项选择题The successful operation of any engine or machine and （） depend on effective lubrication.
A.their no trouble period B.their freely trouble period C.its free trouble life D.its trouble-free life
