问题 问答题 简答题

变压器的轻瓦斯保护动作时如何处理?

答案

参考答案:

轻瓦斯信号出现后,应立即对变压器进行全面外部检查,分析原因,及时处理。检查:

①油枕中的油位、油色是否正常;

②瓦斯继电器内是否有气体;

③变压器本体及强油系统有无漏油现象;

④变压器负荷电流、温度是否在允许范围内;

⑤变压器声音是否正常等。

分析变压器是否经检修换油后投入运行,运行中补油、更换再生器硅胶的情况等;应取出瓦斯继电器中的气体,确定是否是可燃气体,必要时做色谱分析或抽取油样化验分析。

在处理过程中,如轻瓦斯保护动作时间间隔越来越短时,应立即倒换备用变压器,将该变压器退出运行。

阅读理解

.British people are famous for drinking tea. But brother and sister, Sarah and Bobby Green, became young millionaires when they opened a chain of American-style coffee shops in the UK.

Having the idea: It started when Sarah took a weekend trip to New York to visit her brother Bobby. One evening, in a Thai restaurant, Sarah told Bobby how much she wished she could buy American-style coffee in London. Bobby suggested they started their own coffee shop. Sarah fell in love with the idea.

Doing the Research: Back in London, she spent a whole day on the London subway, getting off the train at different stations to taste the coffee. “It was terrible, and I knew there was a gap (空缺) in the market.” In 1995, they opened their first Coffee Republic shop in central London.

Making it work: The first year was very difficult. British people were not used to the names of American coffees, like latte and macchiato. But being successful was their dream and they were not going to give up. Today, there are over 100 Coffee Republic shops all over the country and the company has £30 million a year.

Advice for others: Sarah has now written a best-selling book about their experience, called Anyone Can Do It ! She hopes it will help other young people to start their own businesses. She says, “If you think you have the energy, then get out and follow your dream.”

小题1:What kind of company do they run?

A.A fast-food restaurant.

B.A tea shop.

C.A coffee shop.

D.A big hotel.小题2:Where are their Coffee Republic shops?

A.All over the UK.

B.All over the US.

C.In central London.

D.In New York.小题3:Which of the following information is mentioned(提到) in the passage?

A.Sarah was not interested in Bobby’s idea.

B.British people never drank coffee before 1995.

C.Sarah’s best-selling book is about how to make coffee.

D.Sarah found a business chance while doing the research.小题4:What is the passage mainly about?

A.Sarah’s life story.

B.Sarah’s weekend trip.

C.The American-style coffee.

D.The success of a family business.小题5: Where may this passage come from?

A.In a scientific report.

B.In a newspaper.

C.In a sports magazine.

D.In a novel.

选择题