违法和不良信息举报 联系客服
免费注册 登录

In a vapor compression refrigeration the evaporating pressur

题目
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

如果没有搜索结果或未解决您的问题，请直接 联系老师 获取答案。
相似问题和答案

第1题：

Which statement is true about compression subnets?（）

  • A、Compression subnets are turned on by default.
  • B、Compression subnets advertise remote routes.
  • C、Compression subnets are usually LAN-side subnets.
  • D、Compression subnets are usually WAN-side subnets.

正确答案:C

第2题：

单选题
When a water is heated, it changes into vapor.
A

a water

B

is heated

C

changes

D

into vapor


正确答案： A
解析：

第3题：

Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?

A.compression must be low for effective spark ignition

B.compression must be low for required horsepower and torque generation

C.compression must be low to prevent pre-ignition

D.compression must be low to have effective pre-ignition


正确答案：C

第4题：

单选题
Vapor given off by a flammable liquid will burn when ignited provided（）
A

the vapor and air mixture is too rich

B

it is mixed with certain proportions of air

C

the vapor is too little compared to the air

D

it is of heavy toxicity


正确答案： A
解析： 暂无解析

第5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6题：

You want to use RMAN to create compressed backups.  Which statement is true about the compression algorithms that RMAN can use？（）

  • A、 The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm.
  • B、 The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm.
  • C、 The ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm.
  • D、 Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

正确答案:A

第7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8题：

vapor distillation


正确答案：vapor distillation：水蒸气蒸馏法是将药材的粗粉或碎片浸泡润湿后进行直火加热蒸馏或通入水蒸气蒸馏使药材中的挥发成分随水蒸气蒸馏而带出经冷凝后分层收集挥发油的提取方法。
vapordistillation：水蒸气蒸馏法,是将药材的粗粉或碎片浸泡润湿后,进行直火加热蒸馏或通入水蒸气蒸馏,使药材中的挥发成分随水蒸气蒸馏而带出,经冷凝后分层,收集挥发油的提取方法。

第9题：

单选题
In a compression refrigeration plant the refrigerant is under low pressure in the （） and under high pressure in the （）.
A

compressor；condenser

B

condenser；evaporator

C

throttle valve；evaporator

D

evaporator；condenser


正确答案： D
解析： 暂无解析

第10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

更多相关问题
相关内容