A.smoother pump operation
B.overheating of the bearing
C.reduced corrosion in the bearing
D.increased pump capacity
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A.kinetic energy
B.potential energy
C.mechanical energy
D.thermal energy
A.vaporizes in the condenser
B.reaches the compressor through the suction line
C.flashes in the liquid line
D.condenses in the receiver
A.heat
B.power
C.horsepower
D.foot-pound
A.worn bearings and piston pins
B.slugging due to flooding back
C.too much oil in circulation
D.All of the above
A.superheated
B.super-cooled
C.at or below the dew point
D.All of the above
最新試題
A salinity indicator is used to determine the （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Which of the following statements is correct concerning heat transfer?（）
Thermostatic expansion valves can be adjusted for （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The general purpose of a heat exchanger is to （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.