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 （）.
Thermostatic expansion valves can be adjusted for （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
A pressure drop through the refrigerant liquid line may cause （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Which of the listed pumps is NOT a positive displacement pump?（）
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）