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凝汽器热负荷（condenser duty condenser loAd）
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更多 “凝汽器热负荷（condenser duty condenser loAd）” 相关考题
考题
()throttlestheliquidrefrigerantandmaintainsthepressuredifferencebetweenthecondenserandtheevaporator。
A、TheexpansionvalveB、CompressorC、EvaporatorD、Condenser
考题
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?A.A shortage of liquid refrigerant.B.Excessive frost on the evaporator.C.Excessive condenser cooling water.D.Insufficient condenser cooling water flow.
考题
单选题Low compressor head pressure in a refrigeration system can be caused by（）.A
insufficient condenser cooling waterB
excessive condenser cooling waterC
air in the refrigeration systemD
excessive refrigerant in the system
考题
单选题Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?（）A
Shortage of refrigerant oilB
Slight shortage of refrigerantC
Excessive condenser cooling water flowD
Faulty expansion valve
考题
单选题Refrigerant enters the condenser as a （）.A
high pressure liquidB
low pressure vaporC
high pressure vaporD
low pressure liquid
考题
单选题Air that may enter a refrigeration plant tends to collect in the （）.A
upper part of the receiverB
upper part of the condenserC
down stream end of the cooling coilD
outlet end of the condenser
考题
单选题Tube leaks in the distillate cooler of a two stage flash evaporator will result in （）.A
loss of second stage vacuumB
contamination of the distillateC
lower feed inlet temperatureD
contamination of the second stage condenser
考题
单选题If a refrigeration compressor is running continuously without lowering the temperature in the refrigerated space, the trouble may be （）.A
a shortage of compressor oilB
warm food in the refrigeratorC
excessive condenser cooling waterD
a shortage of refrigerant
考题
单选题Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）A
A shortage of liquid refrigerantB
Excessive frost on the evaporatorC
Excessive condenser cooling waterD
Insufficient condenser cooling water flow
考题
单选题If the temperature in the icebox is too high, the trouble could be（）A
a clogged scale trapB
air in the systemC
automatic controls not functioning properlyD
insufficient cooling water to the condenser
考题
单选题For a flash type evaporator, a demister is located the condenser（）A
AfterB
beforeC
insideD
outside
考题
单选题Excessively warm water leaving condenser may be caused by（）A
fouled tubes in shell and tube condenserB
too little or too warm condenser waterC
air or non-condensable gas in systemD
overcharge of refrigerant
考题
单选题（） is used for sensing the temperature of the room in the air condition system.A
An expansion valveB
An evaporatorC
A thermostatD
A condenser
考题
单选题Early models of the flash-type evaporators used a separate shell-and-tube heat exchanger as the air ejector condenser.More recent models use a combined air ejector condenser with the（）A
distilling condenserB
salt water feed heaterC
distillate coolerD
flash chamber
考题
单选题The inner part of the condenser should be cleaned with （）.A
gas oilB
diesel oilC
chemical compoundD
Freon-12
考题
单选题In a refrigeration system, if the cooling water to the condenser fails, the（）.A
box temperature solenoid valve will closeB
expansion valve will closeC
compressor will shutdownD
king valve will open
考题
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
The condenser and the expansion valveB
The king valve and the solenoid valveC
The compressor and the expansion valveD
The condenser and the solenoid valve
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