pump must always be primed
volute must impart a radial and rotary motion of the water suction side
connection must guide the liquid to the lantern rings
stuffing box should not be allowed any water leakage
第1题：
How to pump out bilge water in the engine room?
第2题：
It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong direction. This would cause the pump ______.
A.head capacity to improve
B.discharge to be reversed
C.efficiency to decrease
D.slippage to decrease
第3题：
Will we connect the motor with the fresh water pump? No, the pump is ( )_
A.in good order
B.out of order
C.works well
第4题：
简述H-pump stroke time out报警信息的含义及处理方法。
第5题：
If you must pump bilges while a vessel is in port，you should pump only ______．
A.If discharge is led to a shore tank or barge
B.During the hours of darkness
C.On the outgoing tide
D.As much as is necessary
第6题：
Which statement is NOT true?
A.In a simple vane pump, the rotor and cam ring are exactly concentric
B.Balanced vane pump has an elliptical cam ring
C.Liquid in both gear pump and vane pump are forced out to the outlet.
D.Balanced vane pumps can work at a higher pressure than the simple vane pump
第7题：
If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
第8题：
After reading your letter , I can thoroughly understand why you are running ()patience.
A、without
B、out of
C、lack of
D、in
第9题：
Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．
A.The gasoline tank is full
B.The bilges，cabins，etc．are thoroughly ventilated
C.You have fresh water on board
D.Each of the above is followed
第10题：
At the discharging port, tankers pump the oil ashore using （）.