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单选题
A refrigeration system contaminated with moisture can be affected by （）.
A
acid formation
B
sludge formation
C
ice in the expansion valve
D
All of the above
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pressure changes in the suction lineD
failure of the king solenoid valve
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condenserC
expansion valveD
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opening additional expansion valvesC
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compressorB
condenserC
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purgedC
pluggedD
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liquid receiverC
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higher than normal discharge pressure with a normal box temperatureD
the compressor to run continuously
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Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityC
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a low refrigerant charge in the systemC
the liquid valve is open too muchD
high evaporator superheat
考题
单选题Moisture in a refrigeration system can cause （）.A
freezing the expansion valve closedB
corrosion of system pipingC
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考题
单选题Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）A
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the same amount of moisture as cold airD
moisture independent of air temperature
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