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【单选题】
计算负荷时单位面积耗电量法是指单位面积所需电力【】建筑面积。___
A. 加上
B. 乘以
C. 除以
D. 减上
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答案
B
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同一建筑物内部相互连通的房屋、多层住宅的每个单元、同一围墙内一个单位的电力和照明用电,只允许设置【】进户点。___
A. 1个
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建筑物与供电设施相互妨碍,应按【】的原则,确定其担负责任。___
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电杆偏离线路中心线不应大于【】m。___
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跌落式熔断器熔管一般采用内置消弧管的【】制成。___
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集中抄表终端是对低压用户用电信息进行采集的设备,包括【】。___
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【单选题】
开启式负荷刀开关俗称【】。___
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《国家电网公司业扩供电方案编制导则》明确,二级重要客户,是指中断供电将可能产生下列后果之一的电力客户:【】。___
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电压互感器采用V/V接线时,应在【】相二次侧接地。___
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在重大节日为了保证供电可靠性而进行的巡视工作称做【】。___
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【单选题】
送电试验后,电力电容器必须【】。___
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B. 检查器身是否损坏
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【单选题】
必须经过【】以后才能确定供电方案。___
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【单选题】
低压供电方案的有效期为【】个月。___
A. 3
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直接接入式与经互感器接入式电能表的根本区别在于【】。___
A. 内部结构
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专变终端安装时,RS485数据线两端应使用电缆标牌或标识套进行对应编号标识,屏蔽层采用【】接地。___
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电流互感器二次回路的连接导线,至少应不小于【】mm2。___
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安全带的静负荷试验周期为【】一次(不包括牛皮安全带)。___
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一般测量380V以下低压电气设备或回路的绝缘电阻时,应使用【】V电压等级的兆欧表。___
A. 380
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A. 4
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用500V兆欧表测氧化锌0.22kV避雷器的绝缘电阻应不低于【】。___
A. 2MΩ
B. 10MΩ
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D. 5MΩ
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高低压塑料绝缘电力电缆最低允许敷设温度为【】℃。___
A. 15
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对于【】负荷,应由两个或多个电源供电。___
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电动机长时间过负载运行,【】大大超过额定电流,电动机过热。___
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成套开关柜、配电盘等漏电保护装置的动作电流数值选择为【】mA以上。___
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某10kV高供高计用户接50/5电流互感器,若电能表读数为20kWh,则用户实际用电量为【】。___
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某村低压线路烧毁,需要检修处理,于是工作负责人就【】登杆检修。___
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容量在【】kVA及以上的配电变压器,应装设空气过滤器。___
A. 60
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起重搬运工作,当设备需从低处运至高处时,可搭设斜坡下走道,但坡度应小于【】。___
A. 30
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使用电容器时有两项主要参数,即耐压值和电容量,而电容器耐压值是指加在其上电压的【】。___
A. 最大值
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一电感线圈接到f=50Hz的交流电路中,感抗XL=50Ω,若改接到f=150Hz的电源时,则感抗XL为【】Ω。___
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断路器的额定电压应【】系统最高电压。___
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