A.negative displacement type
B.turbine type
C.positive displacement type
D.mixed-flow type
您可能感興趣的試卷
你可能感興趣的試題
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
A.bottom
B.top
C.center
D.periphery
最新試題
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
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?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
One cause of high head pressure occurring in a refrigeration system can be （）.
A grease gun is generally used to lubricate a （）.
Which of the following statements is correct concerning heat transfer?（）
Low compressor head pressure in a refrigeration system can be caused by（）.