A.kinetic;pressure
B.kinetic;essential
C.pressure;kinetic
D.pressure;height
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A.throttling the pressure line
B.changing the speed of the rotor
C.either A or B
D.None of the above is tree
A.reciprocating pumps
B.positive displacement pumps
C.centrifugal pumps
D.centripetal pumps
A.positive displacement
B.ejector
C.centrifugal
D.air compressor
A.single screw pump
B.double-screw pump
C.triple screw pump
D.centripetal pump
A.steady
B.in pulsation
C.continuous
D.large
最新試題
A pressure drop through the refrigerant liquid line may cause ().
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?()
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
When the steering gear is in operation, you should ().
A salinity indicator is used to determine the ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()