A.horse power
B.high pressure compressor
C.hand pump
D.high pressure
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A.catch plates
B.swash plates
C.cover plates
D.bedplates
A.filter
B.hole
C.pollution
D.content
A.scaled
B.worn
C.deformed
D.rested
A.a heater
B.a pre-heater
C.an exhaust gas boiler
D.the coal burning boiler
A.be increased
B.be decreased
C.remain constant
D.either be increased or remain constant
最新試題
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 thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
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 pressure drop through the refrigerant liquid line may cause （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
A salinity indicator is used to determine the （）.