单选题(共50题,每题1分)问题:1.接地电阻测量仪是测量(C)的装置。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、绝缘电阻HTMLCONTROLForms.HTML:Option.1B、直流电阻HTMLCONTROLForms.HTML:Option.1C、接地电阻问题:2.下列灯具中功率因数最高的是(A)。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、白炽灯HTMLCONTROLForms.HTML:Option.1B、节能灯HTMLCONTROLForms.HTML:Option.1C、日光灯问题:3.在狭窄场所如锅炉、金属容器、管道内作业时应使用(C)工具。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、ⅰ类HTMLCONTROLForms.HTML:Option.1B、ⅱ类HTMLCONTROLForms.HTML:Option.1C、ⅲ类问题:4.三相异步电动机一般可直接启动的功率为(A)kw以下。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、7HTMLCONTROLForms.HTML:Option.1B、10HTMLCONTROLForms.HTML:Option.1C、16问题:5.利用(A)来降低加在定子三相绕组上的电压的启动叫自耦降压启动。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、自耦变压器HTMLCONTROLForms.HTML:Option.1B、频敏变压器HTMLCONTROLForms.HTML:Option.1C、电阻器问题:6.使用竹梯时,梯子与地面的夹角以(B)°为宜。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、50HTMLCONTROLForms.HTML:Option.1B、60HTMLCONTROLForms.HTML:Option.1C、70问题:7.运输液化气,石油等的槽车在行驶时,在槽车底部应采用金属链条或导电橡胶使之与大地接触,其目的是(B)。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、中和槽车行驶中产生的静电荷HTMLCONTROLForms.HTML:Option.1B、泄漏槽车行驶中产生的静电荷HTMLCONTROLForms.HTML:Option.1C、使槽车与大地等电位问题:8.断路器的电气图形为(A)。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、HTMLCONTROLForms.HTML:Option.1B、HTMLCONTROLForms.HTML:Option.1C、问题:9.属于配电电器的有(B)。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、接触器HTMLCONTROLForms.HTML:Option.1B、熔断器HTMLCONTROLForms.HTML:Option.1C、电阻器问题:10.相线应接在螺口灯头的A()。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、中心端子HTMLCONTROLForms.HTML:Option.1B、螺纹端子HTMLCONTROLForms.HTML:Option.1C、外壳问题:11.异步电动机在启动瞬间,转子绕组中感应的电流很大,使定子流过的启动电流也很大,约为额定电流的(B)倍。HTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Option.1A、2HTMLCONTROLForms.HTML:Option.1B、4-7HTMLCONTROL