A.reciprocating pump
B.gear pump
C.centrifugal pump
D.vane pump
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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
A.windlass
B.anchor capstan
C.turning gear
D.winch barrel
最新試題
Which of the listed pumps is NOT a positive displacement pump?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
The general purpose of a heat exchanger is to （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
When the steering gear is in operation, you should （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
The usual symptoms of cavitation in a centrifugal pump is （）.