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【单选题】

Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to ().

A、maintain adequate coil back pressure

B、prohibit flashing in the liquid line

C、reduce refrigerant volume in the system

D、reduce compressor discharge line loading

更多“Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to ().”相关的问题
第1题

A、Too much refrigerant  B、Too little refrigerant  C、Refrigerant is ran out  D、Running is over  

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第2题

A、stop the refrigerant from flowing  B、force the refrigerant to flow  C、cause the refrigerant pressure to rise  D、cause the refrigerant pressure to fall  

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第3题

A、At the designed operating temperature, the liquid refrigerant charge has changed to a vapor  B、The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity  C、The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature  D、The sensing bulb is never emptied of liquid refrigerant under normal operating conditions  

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第4题

A、system is overcharged with refrigerant  B、system is low on refrigerant  C、discharge valves are leaking excessively  D、discharge valves are leaking slightly  

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第5题

A、Proper refrigerant charge  B、Faulty expansion valve  C、Insufficient refrigerant  D、Solenoid valve stuck open  

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第6题

A、A.too much refrigerant in the system  B、B.oil entrained in the refrigerant  C、C.less than a full charge of refrigerant in the system  D、D.ice crystals forming in the refrigerant  

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第7题

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  

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第8题

A、cool the expansion valve  B、prevent refrigerant superheating  C、condense the refrigerant gas  D、prevent motor overheating  

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第9题

A、a shortage of refrigerant in the system  B、air in the system  C、an accumulation of liquid refrigerant in the crankcase  D、a shortage of oil in the crankcase  

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第10题

A、detect the temperature  B、detect the pressure  C、heat the refrigerant  D、accelerate the refrigerant  

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