A.high temperature distillate can be re- circulated to induce additional flashing
B.scale formation is not a severe problem
C.cold shocking is more effective in removing scale
D.water purity is greatly increased at high capacity
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A.high pressure liquid line
B.low pressure liquid line
C.high pressure vapor line
D.low pressure vapor line
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
A.Dissipate heat
B.Trap foreign matter
C.Separate air from the oil
D.All of the above
最新試題
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
Which of the following statements is correct concerning heat transfer?（）
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（）.