A.changing pump discharge pressure in response to normal load variations
B.a high oil level
C.incorrect fluid viscosity
D.continued slow re-circulation of the oil
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A.maintain liquid refrigerant at the suction of the compressor
B.maintain a preset suction pressure to the compressor
C.start and stop the compressor at preset operating pressures
D.operate at minimum efficiency
A.dehydration
B.condensation
C.evaporation
D.dissolution
A.evaporation
B.distillation
C.dehydration
D.condensation
A.in the chill box
B.before the receiver
C.on the suction side of the compressor
D.on the discharge side of the compressor
A.High conductivity of the distillate indicates distillate salinity is excessive
B.Increasing the absolute pressure of the shell will increase the distillers capacity
C.Mesh separators are used in evaporators to filter the distillate
D.Reducing the brine density will reduce the heat lost overboard
最新試題
The general purpose of a heat exchanger is to （）.
A pressure drop through the refrigerant liquid line may cause （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
A salinity indicator is used to determine the （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
The major source of chemical contaminants in hydraulic fluid is （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Thermostatic expansion valves can be adjusted for （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.