Thursday, September 22, 2022
安装SPD且无准确数据时,电压开关型SPD和限压型SPD之间的线路长度不宜小于(),限压型SPD之间的线路长度不宜小于(...
Thursday, September 22, 2022
Wednesday, September 21, 2022
一次雷击大多数分成3-4次放电,一般是()放电的电流最大,正闪电的比负闪电的电流大。...
Thursday, September 15, 2022
在高土壤电阻率地区,降低防直击雷接地装置的接地电阻宜采用什么方法?...
Thursday, September 15, 2022
单选题长金属物的弯头、阀门连接处的过渡电阻()时,连接处应用金属线跨接。A 小于0.03ΩB 小于0.2ΩC 大于0.03ΩD 大于0.2Ω...
Wednesday, March 6, 2024
Sunday, September 18, 2022
多选题高气压(1个大气压及其以上)极不均匀电场情况下,气体放电的主要外形形式为()。A火光放电B辉光放电C电晕放电D电弧放电E刷状放电F火花放电...
Friday, February 10, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
判断题对晴天大气电导率影响的气象条件,则间接影响晴天大气电场。A 对B 错...
Monday, December 18, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
地网(ρ=100Ω•m)现测得工频接地电阻为10.0Ω,问该接地装置的冲击接地电阻为()。...
Thursday, September 22, 2022
对从事防雷装置检测、防雷工程专业设计或者施工的单位实行()制度,对从事防雷活动的专业技术人员实行()制度。...
Monday, September 19, 2022
Thursday, September 22, 2022