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
The output volume of a positive fixed displacement pump can be changed only by （）.
Thermostatic expansion valves can be adjusted for （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Which of the following statements is correct concerning heat transfer?（）
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
The major source of chemical contaminants in hydraulic fluid is （）.
A salinity indicator is used to determine the （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
The general purpose of a heat exchanger is to （）.