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In the operation of a flash type evaporator equipped with ai

题目
单选题
In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the （）.
A

first stage flash chamber

B

second stage flash chamber

C

first stage after condenser

D

second stage distilling condenser

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

Which of the listed problems could produce a high absolute pressure within a flash type evaporator?

A.production of high salinity distillate

B.seawater feed temperature below 165℃

C.a leak in the first stage demister

D.a cracked distillate pump vent line


正确答案：D

第2题：

单选题
When a flash-type evaporator is to be secured for an extended period of time, the entire unit should be drained, cleaned, and （）.
A

completely filled with saltwater

B

filled with de-scaling compound

C

tightly closed to exclude air

D

vented to the atmosphere


正确答案： A
解析： 暂无解析

第3题：

The condensers located in various stages of a flash evaporator are cooled by( ).

A.distillate

B.seawater

C.brine

D.air


正确答案：B
解析：闪发式造水机各级的冷凝器使用海水冷却。

第4题：

单选题
In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the（）.
A

saltwater heater shell

B

second-stage condenser

C

atmosphere

D

second-stage flash chamber


正确答案： C
解析： 暂无解析

第5题：

单选题
The vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.
A

a separate air ejector unit

B

a direct unimpeded connection between second stage and salt water feed heater

C

either by vacuum drag or an external line from the first stage via a fixed orifice

D

the fixed orifice provided in the steam supply line


正确答案： D
解析： 暂无解析

第6题：

A cabinet or space containing the controls or valves for the fixed firefighting system must be

A.posted with instructions on the operation of the system

B.ventilated and equipped with explosion-proof switches

C.painted with red and black diagonal stripes

D.equipped with a battery powered source of emergency lighting


正确答案：A
含有固定灭火系统的控制和阀门的舱位一定要张贴系统操作说明。

第7题：

单选题
The flash-evaporator is different with the submerged-tube evaporator in that for the former（）
A

Water is heated into vapor on heating surfaces

B

Water is vaporized by pressure difference

C

There are no heating-transfer surfaces

D

There are more heating-transfer surfaces


正确答案： B
解析： 暂无解析

第8题：

In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.

A.saltwater heater shell

B.second-stage condenser

C.atmosphere

D.second-stage flash chamber


正确答案：C

第9题：

单选题
The heated feed-water entering any flash chamber of a flash-type evaporator will（）
A

vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber

B

vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber

C

vaporize, with the remaining water a t a temperature greater than it entered the flash chamber

D

boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber


正确答案： A
解析： 暂无解析

第10题：

单选题
我船配有自动舱盖。（）
A

Our ship is equipped with automatic hatch covers.

B

Our ship is equipped with folding-type hatch covers.

C

Our ship is equipped with side-rolling hatch covers.

D

Our ship is equipped with rolling-type hatch covers.


正确答案： D
解析： 暂无解析

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