A.kg
B.MPa
C.meter fluid column
D.None of the above is true
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A.reciprocating pumps
B.positive displacement pumps
C.centrifugal pumps
D.centripetal pumps
A.depending on
B.in relative to
C.regardless of
D.because of
A.variable stroke pumps
B.multistage pumps
C.positive displacement pumps
D.triple-ported pumps
A.positive displacement
B.ejector
C.centrifugal
D.air compressor
A.reciprocating pump
B.positive displacement pump
C.centrifugal pump
D.centripetal pump
最新試題
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
One cause of high head pressure occurring in a refrigeration system can be ().
The output volume of a positive fixed displacement pump can be changed only by ().
A pressure drop through the refrigerant liquid line may cause ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
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?()