A.Refrigeration
B.Air conditioning
C.Ventilation
D.Heating
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A.Refrigeration
B.Air conditioning
C.Ventilation
D.Heating
A.increase；reduce
B.reduce；increase
C.increase；increase
D.reduce；reduce
A.instantaneous
B.instantaneously
C.simultaneous
D.simultaneously
A.An economizer
B.An attemperator
C.A water dram
D.A down-comer tube
A.cap
B.disc
C.tag
D.cover
最新試題
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
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?（）
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A pressure drop through the refrigerant liquid line may cause （）.
Which of the following statements is correct concerning heat transfer?（）