A.to pump off
B.being pumped
C.pumping out
D.it pumping out
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A.reciprocating pump
B.gear pump
C.centrifugal pump
D.vane pump
A.reciprocating
B.hydraulic
C.turbine
D.vane
A.a level controller
B.a temperature switch
C.a pressure switch
D.a floating ball
A.a hoisting motor
B.a luffing motor
C.a mooring motor
D.a slewing motor
A.the drive pump
B.the drive motor
C.the warp end
D.the purchase
最新試題
When the steering gear is in operation, you should （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
A pressure drop through the refrigerant liquid line may cause （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
A salinity indicator is used to determine the （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.