A.throttling the pressure line
B.changing the speed of the rotor
C.either A or B
D.None of the above is tree
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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
A.propeller
B.impeller
C.circumference
D.screw
最新試題
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 ().
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
The major source of chemical contaminants in hydraulic fluid is ().
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().
Low compressor head pressure in a refrigeration system can be caused by().
A salinity indicator is used to determine the ().
A pressure drop through the refrigerant liquid line may cause ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Thermostatic expansion valves can be adjusted for ().