A.whenever
B.however
C.wherever
D.whether
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A.negative displacement type
B.turbine type
C.positive displacement type
D.mixed-flow type
A.well ventilated
B.well clean
C.in good order
D.more room
A.lower
B.higher
C.the lower
D.the higher
A.evaporation
B.frosting
C.condensing
D.compressing
A.consume
B.distill
C.run
D.operate
最新試題
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 （）.
Thermostatic expansion valves can be adjusted for （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
Which of the following statements is correct concerning heat transfer?（）
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Which of the listed pumps is NOT a positive displacement pump?（）
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A salinity indicator is used to determine the （）.