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In the refrigeration compressor the temperature of the vapor

题目
单选题
In the refrigeration compressor the temperature of the vapor is （） by compression.
A

raised

B

risen

C

reduced

D

maintained constant

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相似问题和答案

第1题：

If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.

A.an excess of liquid refrigerant

B.the expansion valve overfeeding

C.a fouled compressor suction strainer

D.the compressor short cycling


正确答案：C

第2题：

Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.

A.carbon deposits on the compressor suction valves

B.the evaporator temperature to increase

C.rapid corrosion of the thermal expansion valve

D.no operating problems


正确答案：B

第3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 oil

B.Slight shortage of refrigerant

C.Excessive condenser cooling water flow

D.Faulty expansion valve


正确答案：B
解析：refrigeration：冷藏，制冷;constantly：恒定地;simultaneously：同时;de-crease：减少;refrigerate：冷藏，制冷;refrigerant：制冷剂;slight：轻微
译文：如果制冷压缩机持续运转的同时被冷却空间没有降温，其原因可能是制冷剂不足。

第4题：

单选题
In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.
A

evaporator

B

compressor

C

condenser

D

none of the above


正确答案： C
解析： 暂无解析

第5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 oil

B

Slight shortage of refrigerant

C

Excessive condenser cooling water flow

D

Faulty expansion valve


正确答案： B
解析： 暂无解析

第6题：

An increase in the heat load to a refrigeration system will cause ______.

A.the suction pressure to decrease

B.the suction temperature to increase

C.increased ice formation on the evaporator coil

D.excessive short cycling of the compressor


正确答案：B

第7题：

单选题
Low compressor head pressure in a refrigeration system can be caused by（）.
A

insufficient condenser cooling water

B

excessive condenser cooling water

C

air in the refrigeration system

D

excessive refrigerant in the system


正确答案： A
解析： 暂无解析

第8题：

If the refrigeration compressor crankcase is sweating, the cause may be due to

A.a shortage of refrigerant

B.the compressor running continuously

C.liquid refrigerant returning to the compressor

D.the compressor short cycling on the high pressure cutout


正确答案：C

第9题：

单选题
The vapor pressure of a substance（）.
A

decreases as temperature increases

B

increases with the temperature

C

is not affected by temperature

D

may increase or decrease as the temperature rises


正确答案： B
解析： 暂无解析

第10题：

单选题
If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.
A

increase the flow of the cooling water through the condenser

B

adjust the high pressure cutout to maintain the desired pressure

C

open the hot gas bypass temporarily to reduce capacity

D

purge non-condensable gases to reduce the excess pressure


正确答案： C
解析： 暂无解析

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