注意：此页面搜索的是所有试题
政治思修
(判断题)一般尖嘴钳,钢丝钳绝缘柄的耐压值是500V,可带电操作。( )
·正确
·错误
(判断题)发现有人触电应立即将其拉开。( )
·正确
·错误
(判断题)可在带电体上使用电工刀操作。( )
·正确
·错误
(判断题)电流从带电体流经人体到大地形成回路,这种触电叫单相触电。( )
·正确
·错误
(判断题)40W的白炽灯与40W的日光灯的电耗是一样的。( )
·正确
·错误
(单选题)用交流电压表测得交流电压的数值是( )。
· 平均值
· 有效值
· 最大值
(单选题)电力电缆铝芯线的连接常采用( )。
· 钳压法
· 焊接法
· 绑接法
(单选题)供电电路多采取提高功率因数的措施,其目的在于( )。
·减少用电设备的有功功率
·减少用电设备的无功功率
·减少电源向用电设备提供的视在功率
(单选题)下列说法中错误的是( )
· 单相负载接入三相四线制电路时,额定电压等于相电压者接在火线与零线之间
·单相负载接入三相四线制电路时,额定电压等于线电压者接在两火线之间
·三相四线制电路中,零线上可以通过安装开关和熔断器来保护电路
(单选题)下列各式正确的是( )
·
·<img src="data:image/png;base64,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" >
下列几种电器设备使用时,那种需要三孔插座( )。
·电视机
·录音机
·电饭锅
·手机充电器
七股芯线的导线做直连接时,应将导线按( )股分成三组,然后再顺时针方向紧密缠绕。
·2、2、3
·1、1、5
·1、3、3
·3、3、1
做导线的材料要有良好的( )。
·导电性
·绝缘性
·节能性
·电阻性
下列电流通过人体的路径最危险的是( )。
·从右手到脚
·从左手到脚
·从右脚到左脚
·从左手到右手
荧光灯的镇流器从启动到工作的过程中起的作用是( )。
·稳压
·限流
·产生瞬时高压
·节省电能
·正确
·错误
(判断题)发现有人触电应立即将其拉开。( )
·正确
·错误
(判断题)可在带电体上使用电工刀操作。( )
·正确
·错误
(判断题)电流从带电体流经人体到大地形成回路,这种触电叫单相触电。( )
·正确
·错误
(判断题)40W的白炽灯与40W的日光灯的电耗是一样的。( )
·正确
·错误
(单选题)用交流电压表测得交流电压的数值是( )。
· 平均值
· 有效值
· 最大值
(单选题)电力电缆铝芯线的连接常采用( )。
· 钳压法
· 焊接法
· 绑接法
(单选题)供电电路多采取提高功率因数的措施,其目的在于( )。
·减少用电设备的有功功率
·减少用电设备的无功功率
·减少电源向用电设备提供的视在功率
(单选题)下列说法中错误的是( )
· 单相负载接入三相四线制电路时,额定电压等于相电压者接在火线与零线之间
·单相负载接入三相四线制电路时,额定电压等于线电压者接在两火线之间
·三相四线制电路中,零线上可以通过安装开关和熔断器来保护电路
(单选题)下列各式正确的是( )
·
·<img src="data:image/png;base64,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" >下列几种电器设备使用时,那种需要三孔插座( )。
·电视机
·录音机
·电饭锅
·手机充电器
七股芯线的导线做直连接时,应将导线按( )股分成三组,然后再顺时针方向紧密缠绕。
·2、2、3
·1、1、5
·1、3、3
·3、3、1
做导线的材料要有良好的( )。
·导电性
·绝缘性
·节能性
·电阻性
下列电流通过人体的路径最危险的是( )。
·从右手到脚
·从左手到脚
·从右脚到左脚
·从左手到右手
荧光灯的镇流器从启动到工作的过程中起的作用是( )。
·稳压
·限流
·产生瞬时高压
·节省电能