A.evaporator pressure decrease
B.evaporator coil over-feed
C.evaporator capacity increase
D.expansion valve diaphragm rupture
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A.head capacity to improve
B.discharge to be reversed
C.efficiency to decrease
D.slippage to decrease
A.gums, acids, and varnishes
B.removed by cellulose type filters
C.neutralized by oil additives
D.not removed by absorbent filters
A.repack all valve stems
B.lubricate it prior to use
C.replace the foundation bolts
D.balance the warping heads
A.blue
B.green
C.orange
D.purple
A.blue
B.green
C.orange
D.purple
最新試題
The major source of chemical contaminants in hydraulic fluid is ().
The general purpose of a heat exchanger is to ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
A pressure drop through the refrigerant liquid line may cause ().
The output volume of a positive fixed displacement pump can be changed only by ().
When the steering gear is in operation, you should ().
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?()
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
The usual symptoms of cavitation in a centrifugal pump is ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()