單項選擇題When a sudden increase in steam demand comes to normal, the drum pressure will and water level in the drum will（）.

A.rise, rise also
B.rise, drop
C.drop, rise
D.drop, drop also


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1.單項選擇題If a hydraulic pump is overheating, the cause may be （）.

A.excessive internal leakage in the pump
B.low discharge pressure and fluid flow
C.excessive fluid level in the hydraulic reservoir
D.operation of the pump at 100% efficiency

2.單項選擇題The motor for the fresh water pump （）.

A.need to repair
B.need to be repaired
C.needs to repair
D.needs repairing

3.單項選擇題I remember （）the oil separator the day before yesterday But it failed again.

A.to repair
B.to be repaired
C.repairing
D.being repaired

5.單項選擇題The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when （）.

A.excessive loads are placed on the winch
B.minimum pull is being exerted by the winch
C.automatic operation of the winch is desired
D.wire is being retrieved at the maximum rate