问题 多项选择题

电气设备的绝缘配合原则有( )。

A.绝缘配合是按系统中出现的各种电压和保护装置的特性来确定设备的绝缘水平
B.根据已有设备的绝缘水平,选择适当的保护装置,以便把作用于设备上的各种过电压所引起的设备损害和影响连续运行的概率,降低到经济上和技术上能接受的水平
C.要正确处理出现的各种电压、各种限压措施和设备绝缘耐受能力三者之间的配合关系
D.全面考虑设备造价、故障损失和维修费用三个方面,力求取得较高经济效益

答案

参考答案:A,B,C,D

解析: DL/T620—1997《交流电气装置的过电压保护和绝缘配合》第10章或《复习指导书(供配电)》11.1.4.1。

阅读理解

阅读理解。

     Though Anjan  Bhattachary  was  deaf  (聋的 ) , eared a good name in cricket (板球). He was

born on October 15, 1951, in West Bengal. When he did not speak or respond to sound, his family

members were very sad. Anjan was strong and very active. He started playing cricket at an early age.

The fact that Anjan was neither able to talk nor hear did not affect (影响) his performance. Very soon

he was  chosen in the state learn of schoolchildren. He showed excellent performance in the matches

one after another.

     At the early age 13,he was chosen in the school team of the East Zone. At the age of fifteen,Anjan

was chosen in the national (国家的)  team of schoolboys. In 1966,he played two test matches with the

school team of London.In 1969 he went to Lucknow to take part in the Sir Frank Warrel Cricket

Tournament. The 18-year-old boy had much success in this match.

     Anjan was so popular that not only his teammates and club members,but even the members of the

opposite team admired (钦佩) him.

根据短文内容,回答问题。

1. When was Anjan born?

    ______________________________

2. What's the matter with Anjan when he was born?

     ______________________________

3. Was Anjan an active boy?

     ______________________________

4. How old was Anjan when he joined in the national team of schoolboys?

                                                          

5. Why did even Anjan's opposite team admire him?

                                                          

判断题