单选题:220kV电力系统中,线路断路器变电所侧的相对地工频过电压水平一般不宜超过下列哪项数值?( ) 题目分类:发输变电专业知识 题目类型:单选题 号外号外:注册会员即送体验阅读点! 题目内容: 220kV电力系统中,线路断路器变电所侧的相对地工频过电压水平一般不宜超过下列哪项数值?( ) A.145kV B.165kV C.189kV D.252kV 参考答案:【答案仅供学习,请勿对照自行用药等】 答案解析:
In Bargh's experiment, the students were asked to__________. In Bargh's experiment, the students were asked to__________.A.rate someone's per 分类:发输变电专业知识 题型:单选题 查看答案
Which of the following led to Kemmons' success according to Which of the following led to Kemmons' success according to the passage?A.Self- 分类:发输变电专业知识 题型:单选题 查看答案
It can be inferred from the second paragraph that Alice Pyne It can be inferred from the second paragraph that Alice PyneA.is unaware of her 分类:发输变电专业知识 题型:单选题 查看答案
在架空送电线路计算垂直于导地线风荷载时,需考虑的因素有以下哪些?( ) 在架空送电线路计算垂直于导地线风荷载时,需考虑的因素有以下哪些?( )A.线条基准高度的风速、杆塔水平档距 B.杆塔两侧弧垂最低点的水平距离 C.风压高度变化 分类:发输变电专业知识 题型:单选题 查看答案