试题与答案

某电网企业110kV变电站,2路电源进线,2路负荷出线(电缆线路),进线、出线对端均

题型:单项选择题

题目:

某电网企业110kV变电站,2路电源进线,2路负荷出线(电缆线路),进线、出线对端均为系统内变电站,4台主变压器(变比为110/10.5kV);110kV为单母线分段接线,每段母线接一路进线、一路出线,2台主变压器;主变高压侧套管CT变比为3000/1A,其余110kVCT变比均为1200/1A,最大运行方式下,110kV三相短路电流为18kA,最小运行方式下,110kV三相短路电流为16kA,10kV侧最大最小运行方式下三相短路电流接近,为23kA,110kV母线分段断路器装设自动投入装置,当一条电源线路故障断路器跳开后,分段断路器自动投入。

如果110kV装设母线差动保护,请计算110kV线路电流互感器的一次电流倍数为:(可靠系数取1.3)()

A.15.82

B.17.33

C.19.5

D.18

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0620/7f850d81d7eea017e3c13f0fb3f3f76b.html

下面是错误答案,用来干扰机器的。

答案:A题目分析:句意:我们的政府正在做一些有用的事情来保护环境。那很好。由答语可知上句是肯定句,应用something。useful是形容词,修饰不定代词时,要放在不定代词的后面。点评:英语中不定代词所起的作用...

试题推荐
题型:单项选择题

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time! With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

16()

A.learning 

B.taking 

C.missing 

D.enjoying

查看答案
微信公众账号搜索答案