A.open-type
B.hermetic
C.A and B
D.None of the above
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A.compressor
B.condenser
C.throttle valve
D.evaporator
A.lower；higher
B.shallower；deeper
C.larger；smaller
D.higher；lower
A.evaporation
B.frosting
C.condensing
D.compressing
A.rise
B.fall
C.be maintained constant
D.None of the above
A.rise
B.fall
C.be maintained constant
D.None of the above is true
最新試題
Which of the following statements is correct concerning heat transfer?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
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?（）
A salinity indicator is used to determine the （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
A grease gun is generally used to lubricate a （）.