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单选题
In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）
A
pressurestat
B
high pressure cutout
C
solenoid valve
D
low pressure cutout switch
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单选题If a refrigeration system compressor crankcase is sweating, you should （）.A
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nonexistentB
for controlling pressureC
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单选题Badly leaking refrigeration compressor discharge valves will cause（）.A
overfeeding of the expansion valveB
damage to the condenserC
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单选题The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by （）.A
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单选题Which of the following statements is correct concerning a typical shipboard multi-coil refrigeration system?（）A
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单选题What separate the high pressure side from the low pressure side in a refrigeration system?（）A
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Compressor and thermal expansion valveD
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单选题While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to （）.A
change the expansion valve adjustmentB
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单选题Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）A
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The king valve and the solenoid valveC
The compressor and the expansion valveD
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考题
单选题A pressure drop in the liquid line of a refrigeration system may cause（）A
the solenoid valve to seizeB
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flash gas to form in the liquid lineD
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