A.Pressure-reducing valve
B.Unloading valve
C.Counterbalance valve
D.Pressure-relief valve
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A.motor overload would open
B.relief valve would open
C.pump would eventually overheat
D.motor would overheat
A.Compound gage
B.Bonrdon tube
C.Manometer
D.Deadweight gage
A.cavitation
B.water hammer
C.fluid friction
D.steam knock
A.sub-cooled liquid
B.high temperature liquid
C.oil saturated liquid
D.superheated vapor
A.Reciprocating
B.Centrifugal
C.Rotary
D.Gear
最新試題
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A salinity indicator is used to determine the （）.
The output volume of a positive fixed displacement pump can be changed only 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 （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
Which of the following statements is correct concerning heat transfer?（）
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.