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
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
Which of the following statements is correct concerning heat transfer?（）
An excessive charge of refrigerant in an air-cooled refrigeration system can 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?（）
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
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 （）.
Thermostatic expansion valves can be adjusted for （）.
A salinity indicator is used to determine the （）.