A.expansion valve to overfeed
B.compressor to knock
C.water regulating valve to fail
D.crankcase drains to plug
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A.poor distillate quality
B.reduced evaporator capacity
C.low brine concentration
D.improper vacuum regulation
A.refrigerant boiling out of solution from the lube oil
B.liquid refrigerant flooding the compressor and system
C.lube oil viscosity being reduced by refrigerant dilution
D.compressor suction pressure suddenly increasing
A.It is corrosive
B.It is odorless
C.It is visible as h blue fog
D.It has a distinctive taste
A.settling in a fuel tank
B.testing in a laboratory centrifuge
C.burning in a calorimeter
D.testing in a closed cup
A.1382 tons
B.1561 tons
C.1600 tons
D.1637 tons
最新試題
Low compressor head pressure in a refrigeration system can be caused by（）.
Thermostatic expansion valves can be adjusted for （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
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 （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
The major source of chemical contaminants in hydraulic fluid is （）.
A grease gun is generally used to lubricate a （）.