A.positive displacement
B.ejector
C.centrifugal
D.air compressor
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A.single screw pump
B.double-screw pump
C.triple screw pump
D.centripetal pump
A.steady
B.in pulsation
C.continuous
D.large
A.propeller
B.impeller
C.circumference
D.screw
A.kg
B.MPa
C.meter fluid column
D.None of the above is true
A.reciprocating pumps
B.positive displacement pumps
C.centrifugal pumps
D.centripetal pumps
最新試題
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?()
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
Low compressor head pressure in a refrigeration system can be caused by().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
When the steering gear is in operation, you should ().
One cause of high head pressure occurring in a refrigeration system can be ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().