停止送电时必须在开关处悬挂停电警示标志,有专人值守,严禁擅自送电。...
Wednesday, August 16, 2023
在HYA50通信电缆中,芯线色谱同为红绿的是()A、第7对B、第8对C、第33对D、第34对...
Wednesday, October 18, 2023
Sunday, August 6, 2023
Wednesday, October 18, 2023
0.4mm线径在20℃时单线直流电阻值为()Ω/km。A、236B、95C、148D、36.6...
Wednesday, December 6, 2023
属于用户线路的有()A、局配线架至交换机电缆B、用户引入线C、楼内暗配线D、架空电缆...
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市话电缆的充气维护工作大体上可分为充气、测压、()三部分。...
Monday, June 12, 2023
电缆模块型接线子接续规定:接续配线电缆芯线时,模块下层接()线。...
Sunday, January 28, 2024
Wednesday, January 31, 2024
Tuesday, September 13, 2022
Monday, June 12, 2023
采用机械(电缆敷设机)敷设光(电)缆,必须事先清除光(电)缆路由...
Sunday, September 11, 2022
木杆上装设避雷线可直接用卡钉钉固,卡钉间距为()mm。...
Wednesday, December 6, 2023
当通信线与电力线接触或电力线落在地面上时,必须立即停止一切有关作业活动,方能离开现场。...
Wednesday, November 23, 2022
有一个由两个电阻串联的电路,两个电阻的比值为1:3,那么两个电阻上的电流之比是()...
Monday, November 28, 2022
Wednesday, May 15, 2024
Sunday, September 11, 2022
Sunday, September 11, 2022
凡是大于基本的单位芯线组合叫()A、子单位B、基本的单位C、半单位D、超单位...
Thursday, March 14, 2024
Sunday, December 3, 2023