A、positive displacement
B、ejector
C、centrifugal
D、air compressor
更多“Through a （） pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.”相关的问题
A、cargo pump pressure gauges B、crossover lines interconnecting two pumps C、suction side of pumps D、atmosphere through pump vents
A、In order for a fluid to be pumped, a fluid must be made to flow B、A substance must be cold in order for it to be pumped C、The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system D、A pump must receive its energy from an external source
A、one fixed power pump and one portable hand pump B、one fixed hand pump and one portable hand pump C、two portable hand pumps D、either "A" or "B"
A、Variable volumes can be obtained with gear pumps only by variation of the pump drive speed B、A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft C、The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate D、All of the above
A、have a greater head capacity B、operate with increased impeller efficiency C、discharge through the suction side of the pump casing D、require more power to run the shaft
A、can’t be controlled very precisely B、can’t be controlled as flexibly as the separate pump system C、can be controlled as flexibly as the separate pump system D、can be controlled more precisely and flexibly
A、A.reduce radial thrust to the impeller B、B.double the liquid velocity through the pump when compared to a single volute C、C.reduce hydraulic end thrust D、D.provide the effect of multi-staging
A、stop the flow of oil at the main deck manifold B、prevent the oil from leaving the shore facility C、prevent the oil from siphoning through the pump D、None of the above
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