问题 问答题 简答题

满水事故的处理?

答案

参考答案:

1)对照汽、水流量及各水位计,确认水位计指示是否正确。

2)若水位高是因燃料量突增引起,应立即减少燃料量。

3)水位高至50mm时,将给水自动切为手动调整,减小给水量。

4)水位高至125mm时,开启事故放水门或锅炉定排放水,继续减小给水量。

5)经过放水后水位无下降趋势,且主汽温度明显下降,应关小或关闭减温水调整门,立即开启过热器及主汽管道疏水门,待汽温恢复正常后再关闭。

6)水位高至﹢300mm,(三期+250mm)延时2秒无下降趋势且MFT未动作时,应手动MFT,紧急停炉。

7)停炉后若水位仍高,应加强放水,并注意水位变化情况。

8)水位正常后,停止放水,汇报值长,查明故障原因,缺陷消除后重新点火。

单项选择题 案例分析题
阅读理解

阅读理解。

     The nervous-looking young man had waited for a few moments outside the jeweler's before he got enough

courage to enter. He was warmly greeted by a young assistant. James felt a rush of blood to his face as he

explained he would be bringing in his future wife to choose a birthday present. The assistant listened carefully

and told him he'd better buy a necklace (项链). He wasn't used to buying jewelry and was a little worried about

overspending, because he was not very rich. After some discussion as to a reasonable price and the type, the

assistant showed him dozens of necklaces and helped him to choose. At last James chose one and left the shop

promising to return at five o'clock. Half an hour later than planned, James did return to the shop with his future

wife, Laura. The assistant acted as if she had never seen him before. When she was asked to show them some

necklaces, she first brought out some inexpensive ones for them to choose, and then gave them the ones she

had prepared. A choice was soon made and they went away satisfactorily. Later James would certainly come

back to buy what he wanted when he got married.

1. The good title for this passage is " _____". [ ]

A. A Clever Assistant.

B. Buying a Birthday Present

C. How to Choose a Necklace

D. A Brave Young Man

2. The word "overspending" in the passage means _____. [ ]

A. spending too much energy

B. spending too much time

C. spending more time than he planned

D. spending too much money

3. When James told the assistant why he wanted to buy a present, his face _____. [ ]

A. turned pale

B. turned red

C. turned yellow

D. turned black

4. James and Laura reached the shop at _____. [ ]

A. 4:30

B. 5:00

C. 5:30

D. 6:00