單項(xiàng)選擇題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


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題The starting of a marine diesel engine is generally carried out with the assistance of （）.

A.compressed air
B.electricity
C.hydraulic oil
D.compressing air

3.單項(xiàng)選擇題The starting air system usually has （） to prevent starting if anything is not in order.

A.stop valves
B.interlocks
C.non-return valves
D.air vents

4.單項(xiàng)選擇題The starting air system usually has （） to prevent starting if anything is not in order.

A.drain cocks
B.vent valves
C.counteracts
D.interlocks

5.單項(xiàng)選擇題The space between cylinder liner and jacket is called （）.

A.the cooling water
B.the circulating water
C.the cooler
D.the cooling water space