【判断题】
停电检修作业后,送电之前,原在配电室内悬挂的临时接地线应由值班员拆除
A. 对
B. 错
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答案
A
解析
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【判断题】
检修人员未看到工作地点悬挂接地线,工作许可人(值班员)也未以手触试停电设备、检修人员应进行质问并有权拒绝工作
A. 对
B. 错
【判断题】
操作票中,一项操作任务需要书写多页时,须注明转接页号,且页号相连
A. 对
B. 错
【判断题】
高压检修工作的停电必须将工作范围的各方面进线电源断开,且各方面至少有一个明显的断开点
A. 对
B. 错
【判断题】
变压器的分接开关往I 档方向调整时,可降低二次侧的电压
A. 对
B. 错
【判断题】
输电主网与电力网间用的是变压器多数是降压变压器
A. 对
B. 错
【判断题】
变压器型号中横短线后面的数字表示变压器的额定容量,其单位是kVa
A. 对
B. 错
【判断题】
变压器容量的单位是kw
A. 对
B. 错
【判断题】
变压器中性点接地属于保护接地
A. 对
B. 错
【判断题】
降压配电变压器的二次输出的额定电压要高于用电设备额定电压10%左右
A. 对
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【判断题】
焊接较大的焊件时,应先用电烙铁将焊件加温
A. 对
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移动式电气设备的性能与现场使用条件无关
A. 对
B. 错
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合理的规章制度是保障安全生产的有效措施,工矿企业等单位有条件的应该建立适合自己情况的安全生产规章制度
A. 对
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跨步触电是人体遭受电击的一种,其规律是离接地点越近,跨步电压越高,危险性也就越大。
A. 对
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【判断题】
10kV 三相供电系统一般采用中性点不接地或高电阻接线方式
A. 对
B. 错
【判断题】
接地变压器的绕组相电压中无三次谐波分量
A. 对
B. 错
【判断题】
突然停电会造成人身伤亡的用电负荷就属于一类负荷
A. 对
B. 错
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高压断路器是一次设备
A. 对
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【判断题】
配电装置的长度超过6m时,屏后应有两个通向本室或其他房间的出口,其距离不宜大于20m
A. 对
B. 错
【判断题】
接地线用绿/ 黄双色表示
A. 对
B. 错
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绝缘安全用具是分为基本安全用具及辅助安全工具
A. 对
B. 错
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发生线性谐振过压时,电压互感器铁芯严重饱和,常造成电压互感器损坏
A. 对
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弧光接地过电压一般只在中性点非直接接地系统中发生单相不稳定电弧接地时产生
A. 对
B. 错
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在正常情况下,避雷器内部处在导通状态
A. 对
B. 错
【判断题】
过电压通常可分为外部过电压,内部过电压和操作过电压
A. 对
B. 错
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新电缆敷设前不用做交接试验,但安装竣工后和投入运行前要做交接试验
A. 对
B. 错
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聚氯乙烯绝缘电缆一般只在35kV 及以下电压等级中应用
A. 对
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绞线( LJ )常用于 35kV 以下的配电线路,且常作分支线使用
A. 对
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无人值班的变配电所中的电力电缆线路,每周至少应进行一次巡视检查
A. 对
B. 错
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电缆头的制造工艺要求高是其缺点之一
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在爆炸危险场地应将所有设备的金属外壳部分、金属管道以及建筑物的金属结构分别接零或接地,并连成连续整体
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雷电可引起电绝缘击穿,破坏设备造成大面积停电,还可威胁到人的生命,对财产造成巨大损失
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接地是消除静电的有效方法电。在生过程中应将各设备金属部件电气连接,使其成为等电位体接地
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当电气火灾发生时,如果无法切断电源,就只能带电灭火,并选择干粉或二氧化碳灭火器,尽量少用基式灭火器
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为了防止直接触电可采用双重绝缘、屏护、隔离等技术措施以保障安全
A. 对
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在电气控制系统中,导线选择的不合适、设备缺陷、设备电动机容量处于“大马拉小车”等都是可能引发电气火灾的因素
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在使触电者脱离电源的过程中,救护人员最好用一只手操作,以防自身触电
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保护接地用于接地的配电系统中,包括低压接地网、配电网和变压器接地配电网及其他不接地的直流配电网中
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保护接地、重复接地、工作接地、保护接零等,都是为了防止间接触电最基本的安全措施
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不可在设备带电的情况下测量其绝缘电阻
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药学服务的对象包括___
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