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單項(xiàng)選擇題

“The engine not obtaining the sufficient speed for firing” means that （）.

A.the start fails
B.the fuel pumps will be put into operation
C.the fuel valves are damaged
D.the combustion process will take over

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單項(xiàng)選擇題

The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.

A.crack
B.knocking
C.leaking
D.seizure

單項(xiàng)選擇題

The engine is started with （） supplied from air receivers.

A.pressure oil
B.pressure water
C.compressed air
D.cooling water

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