A.injection valve
B.relief valve
C.discharge valve
D.inlet filter
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A.gear
B.vane
C.screw
D.centrifugal
A.low pressure
B.low discharge
C.low speed
D.high pressure
A.positive displacement
B.non-positive displacement
C.mixed-flow
D.axial-flow
A.Reciprocating pumps
B.Rotary pumps
C.Centrifugal pumps
D.Gear pumps
A.interlocked
B.interconnected
C.interfered
D.interacted
最新試題
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The general purpose of a heat exchanger is to （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
A salinity indicator is used to determine the （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
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 amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
The major source of chemical contaminants in hydraulic fluid is （）.