高压新职工进厂考试试题.doc

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1、高压管理科新职工进厂考试试题一、判断题1、电流的通路称为电路。··························································（√）2、电路中某两点的电位差又叫电压。················································（√）3、可将单相三孔电源插座的保护接地端（面对插座的最上端）与接零端用导线连接起来，共用一根线。·······························································

2、·········（×）4、电源线接在插座上或接在插头上是一样的。········································（×）5、绝缘鞋是防止跨步电压触电的基本安全用具。········································(×)6、直流电流表可以用于交流电路。··················································（×）7、电源电动势与端电压相等。·············································

3、·········(×)8、并联电容器的总电容值等于各并联电容器电容值之和。······························（×）9、使用万用表测量电阻，不许带电进行测量。·········································（√）10、绝缘手套有微小漏气可继续使用。···············································（×）11、交流接触器铁心上的短路环断裂后会使动静铁心不能释放。·························（×）12、带有额定负

4、载转矩的三相异步电动机，若使电源电压低于额定电压，则其电流就会低于额定电流。········································································（×）13、电压互感器二次绕组不允许开路，电流互感器二次绕组不允许短路。···················（×）14、使用万用表测量电阻时，每转换一次欧姆挡都要把指针调零一次。·····················（√）15、低压断路器各脱扣器的整定值一经调整好，不允许随意变动，以免影响其动作值。······

5、·（√）16、为了提高功率因数，一般加装电抗器。···········································(×)17、当按下常开按钮然后再松开时，按钮便自锁接通。·································（×）18、接触器除用来接通大电流电路外，还具有欠电压和过电流保护功能。·················（×）19、电源电动势与端电压相等。······················································(×)20、接线图主要用于接线、

6、线路检查和维修，不能用来分析线路的工作原理。··············（√）21、安装控制线路时，对导线的颜色没有具体要求。····································（×）22、接触器自锁控制线路具有失电压和欠电压保护功能。································（√）23、所谓点动控制是指点一下按钮就可以使电动机起动并连续运转的控制方式。···········（×）24．电容元件是储能元件。···········································

7、···············(√)25、变压器的工作原理实际上利用电磁感应原理，把一次侧电能传送给二次侧负载。········(√)26、同心绕组是将一次侧、二次侧线圈套在同一铁芯柱的内、外层，一般低压绕组在外层，高压绕组在内层。··········································································(×)27、热轧硅钢片比冷轧性能更好，磁导率高而损耗小。·······························(×)28、温升是指变压器在额定运行状态

8、下允许升高的最高温度。·························（×）29、电流表接入电路时，应在断电下进行。·········································（√）30、直流电流表可以用于交流