單項(xiàng)選擇題

When the steering gear is in operation, you should （）.

A.check hydraulic oil levels every hour
B.check the rams for overheating
C.check for excessive oil leakage from rams
D.drain water from telemotor cylinders each watch

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單項(xiàng)選擇題

The oil in a cargo winch gear box should be sampled periodically to （）.

A.prevent the gear box from leaking
B.prevent the oil from becoming inflammable
C.make sure it has not become contaminated
D.make sure the motor bearings are lubricated

單項(xiàng)選擇題

A spur gear pump should be operated with the discharge valves （）.

A.slightly opened
B.throttled
C.fully opened
D.halfway opened