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In a compression refrigeration cycle, the temperature of the

题目
单选题
In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the（）.
A

evaporator

B

compressor

C

expansion valve

D

condenser

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相似问题和答案

第1题：

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


正确答案： B
解析： 暂无解析

第2题：

单选题
The evaporating pressure in R22 vapor compression refrigeration plant should be （） atmospheric.
A

below

B

above

C

equal to

D

much larger than


正确答案： A
解析： 暂无解析

第3题：

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the

A.cylinder compression pressure may not be high enough

B.cylinder compression temperature may be too high

C.fuel oil injection pressure may not be high enough

D.scavenge and purge process is incomplete


正确答案：A

第4题：

单选题
Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.
A

lower；higher

B

shallower；deeper

C

larger；smaller

D

higher；lower


正确答案： C
解析： 暂无解析

第5题：

单选题
In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.
A

compressor

B

condenser

C

throttle valve

D

evaporator


正确答案： D
解析： 暂无解析

第6题：

单选题
The latent heat of evaporation is dissipated in the （） in a compression refrigeration system.
A

evaporator

B

condenser

C

expansion valve

D

compressor


正确答案： B
解析： 暂无解析

第7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8题：

The No.3 air cycle pack temperature indication is______hot.

A.being read
B.to read
C.reading
D.read

答案：C
解析：
本题考查动词的形式。
　　题目意为“3号空气循环机组温度指示为热状态。”read用来表示主语的某种状态时，可以用主语形式表示被动意义，也可以使用进行时态，由于空格前有is，选择C。
　　

第9题：

单选题
Poor combustion in a diesel engine can be caused by （）.
A

high compression pressure

B

low intake air temperature

C

low exhaust pressure

D

high scavenge air temperature


正确答案： D
解析： 暂无解析

第10题：

单选题
If the discharge valves on a refrigeration compressor are leaking badly, the compressor should （）.
A

run continuously

B

not start

C

have high discharge pressure

D

short cycle on the high pressure switch


正确答案： D
解析： 暂无解析

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