问题:在通信线路附近有其它线条,没有辨清性质时,一律按()处理。A、无用线B、通信线C、电力线D、光缆线...
Wednesday, January 31, 2024
问题:模块式接线子接续电缆时地线和屏蔽层也必须用模块进行压接。...
Sunday, December 3, 2023
问题: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
Sunday, December 11, 2022
问题:拉线主要采用钢绞线做拉线,通常有哪几种规格()A、7/1.6B、7/2.6C、7/2.8D、7/3.0...
Wednesday, August 16, 2023
问题:全色谱电缆备用线第二对的色谱为()A、白黄B、白黑C、红黄D、白棕...
Sunday, July 30, 2023
问题:全塑电缆的屏蔽层应全程连接通,配线电缆屏蔽层连通电阻不大于5Ω/km。...
Wednesday, January 31, 2024
Monday, June 12, 2023
Thursday, March 14, 2024
问题:下列物体是绝缘体的有()A、金B、橡胶C、陶瓷D、塑料...
Sunday, August 20, 2023
Wednesday, October 18, 2023
Sunday, December 11, 2022
问题:模块接线子的接续优点是()A、电接触好B、工具简单,不需动力源C、效率高D、劳动强度低...
Friday, August 11, 2023
问题:通常情况下,当温度升高时,金属材料的电阻()A、增大B、减小C、不变...
Sunday, August 6, 2023
问题:全塑市内通信电缆A端,又叫内端,用绿色端帽标记。...
Tuesday, September 13, 2022
问题:下列属于交接配线方式优的点是()A、与心线复接相比,交接衰耗比复接衰耗大B、提高了主干电缆的心线使用率C、查找障碍方便,缩短查修时间D、节省主干电缆,降低工程造价...
Sunday, July 30, 2023
问题:市话线路装设一条吊线时,必须在杆路的同一侧,不能左右跳。...
Sunday, September 11, 2022
Wednesday, November 23, 2022
问题:吊线式、自承式电缆布放后接头电缆留长不得小于接口开长的2.5倍。...
Sunday, December 3, 2023
Sunday, December 3, 2023