A.raised
B.risen
C.reduced
D.maintained constant
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A.humidity
B.dry
C.steam
D.oil
A.condenser
B.regurgitate
C.evaporator
D.boil coil
A.liquid receiver
B.compressor
C.condenser
D.cooling coil
A.evaporator
B.condenser
C.expansion valve
D.compressor
A.release
B.absorb
C.develop
D.regenerate
最新試題
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
The major source of chemical contaminants in hydraulic fluid is （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.