问题 问答题 论述题

新安装或大修后的有载调压变压器在投入运行前,运行人员对有载调压装置应检查哪些项目?

答案

参考答案:

对有载调压装置检查的项目有:

(1)有载调压装置的油枕油位应正常,外部各密封处应无渗漏,控制箱防尘良好。

(2)检查有载调压机械传动装置,用手摇操作一个循环,位置指示及动作计数器应正确动作,极限位置的机械闭锁应可靠动作,手摇与电动控制的联锁也应正常。

(3)有载调压装置电动控制回路各接线端子应接触良好,保护电动机用的熔断器的额定电流与电机容量应相配合(一般为电机额定电流的2倍),在主控制室电动操作一个循环,行程指示灯、位置指示盘,动作计数器指示应正确无误,极限位置的电气闭锁应可靠;紧急停止按钮应好用。

单项选择题
阅读理解

A man was selling medicine at a fair(集市).At first he sold bottles of a cure(药剂)for colds(感冒)for just a dollar a bottle.

Many people wanted to buy it and the man's young assistant moved quickly through the crowd collecting money and handing out bottles of the cure.

Then,when he had a big crowd, the man held up a very small bottle.

“And now,ladies and gentlemen,he shouted,“Here is the medicine you have been waiting for.The cure for old age.Drink just one bottle of this and you will live forever.

“And,ladies and gentlemen,the man continued,“I'm not going to charge(向……要价……)you a hundred dollars a bottle for this wonderful medicine.I'm not going to charge you fifty dollars a bottle.I'm not going to charge you twenty-five dollars a bottle.Now,ladies and gentlemen,I'm going to charge you just ten dollars a bottle. Think,my friends,for ten dollars you can live forever.

Most of the people in the crowd did not believe this.

One person shouted,“If it can make you live forever,why don't you drink it?

Then an other person cried,“Yes, you look as if you're at least sixty years old.

“Thank you,sir,thank you,the man answered,“I'm so glad you said that. My real age is three hundred and twenty-nine.

The crowd laughed at this but there were still some people who wanted to believe the man .One of them spoke to the man's assistant as she passed by ,“Is that true?he asked.“Is he three hundred and twenty-nine?

“Don't ask me,the assistant said,“I've only worked for him for a hundred and fifty years.

小题1: What did the man sell at first at the fair?

A.a cure for colds

B.bottles

C.a cure for old age

D.a medicine that made people live forever小题2:How much did the man charge for the cure for old age?

A.one dollar a bottle

B.twenty-five dollars a bottle

C.ten dollars a bottle

D.fifty dollars a bottle小题3: What does the word “assistant” mean in this passage?

A.仆人

B.朋友

C.同伴

D.助手小题4:What does this passage really mean?

A.The cure for old age is very useful and not so expensive.

B.The man is not honest,and so is his assistant.

C.The cheaper the medicine is,the more people will buy.

D.The two men are very honest,and they would like to help people live forever.