【判断题】
(70824)钳形电流表是将被测导线卡入钳口作为电流互感器的副边线圈。( )(1.0分)
A. 对
B. 错
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答案
B
解析
暂无解析
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【判断题】
(70825)测量小于5 A的电流时,可将被测导线在铁芯上多绕几圈测量。( )(1.0分)
A. 对
B. 错
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(70826)在运用客车质量鉴定中,应急电源蓄电池电压低于40 V,属于C类故障。( )(1.0分)
A. 对
B. 错
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(70827)在同一低压系统中,可以同时采用保护接地与保护接零。( )(1.0分)
A. 对
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(70828)大容量的熔断器熔断后,可用铜丝代替。( )(1.0分)
A. 对
B. 错
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(70829)零线上不准装设开关和熔断器。( )(1.0分)
A. 对
B. 错
【判断题】
(70830)电器设备未经验电,一律视为有电,不可用手触及。( )(1.0分)
A. 对
B. 错
【判断题】
(70831)列检更换大型配件时,工组长要亲自组织指挥和负责安全工作。( )(1.0分)
A. 对
B. 错
【判断题】
(70832)接触器本身无过流保护性能。( )(1.0分)
A. 对
B. 错
【判断题】
(70833)在采用氟利昂制冷剂的制冷系统中一定要安装干燥器。(1.0分)
A. 对
B. 错
【判断题】
(70834)在电气化铁路上,接触网的各导线及其相连部件,通常均带有高压电,因此禁止直接或间接地(通过任何物件,如棒条,导线,水流等)与上述设备接触。( )(1.0分)
A. 对
B. 错
【判断题】
(70835)电气控制线路图中所有电器触头都表示通电时所处状态。( )(1.0分)
A. 对
B. 错
【判断题】
(70836)电气化区段车辆人员作业时在接触网未停电,未接地的情况下,禁止在各种车辆的车顶上进行任何作业。( )(1.0分)
A. 对
B. 错
【判断题】
(70837)在电气控制线路图中,同一电器的各个元件,因作用不同,分散画在不同的电路中,但必须标以相同的文字符号。( )(1.0分)
A. 对
B. 错
【判断题】
(70838)非电气化铁路区段的人员临时进入电气化铁路作业(包括通过电气化铁路的乘务员、各种检查人员等)时,必须接受电气化铁路安全教育。( )(1.0分)
A. 对
B. 错
【判断题】
(70839)电流表在电路中要并联,电压表要串联。( )(1.0分)
A. 对
B. 错
【判断题】
(70840)在不断开导线的情况下测量电流的大小,应使用钳形电流表。( )(1.0分)
A. 对
B. 错
【判断题】
(70841)除供电段专业人员按规定作业外,任何人员及所携带的物件、使用的工具等,与接触网设备的带电部分必须保持2 m以上安全距离。( )(1.0分)
A. 对
B. 错
【判断题】
(70842)用万用表欧姆挡测二极管极性时,其“+”插孔是接自内附电池的负极,而“-”插孔是接自正极。( )(1.0分)
A. 对
B. 错
【判断题】
(70843)在接触网未停电、接地的情况下可以用水冲刷车辆上部。( )(1.0分)
A. 对
B. 错
【判断题】
(70844)铁道车辆由走行部、车体、车钩缓冲装置、制动装置及车内设备等五大部分组成。( )(1.0分)
A. 对
B. 错
【判断题】
(70845)处理故障的车辆距接触网不足2 m时,必须将车辆移至无接触网的线路上或按规定停电、接地后方准作业。( )(1.0分)
A. 对
B. 错
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(70846)车辆的车号由基本记号、辅助记号和号码组成。( )(1.0分)
A. 对
B. 错
【判断题】
(70847)车辆的方向是以制动缸活塞杆推出的方向为一位端,相反方向为二位端。( )(1.0分)
A. 对
B. 错
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(70848)动车组在段内或整备所进行整备作业后,司机必须亲自检查确认高压室内、地沟内和车下无作业人员,并与副司机呼唤应答、鸣笛后方可升弓。( )(1.0分)
A. 对
B. 错
【判断题】
(70849)按照编组列车运行的方向,前进的那一端叫做车辆的前端。( )(1.0分)
A. 对
B. 错
【判断题】
(70850)旅客列车运行途中,严禁关闭电子防滑装置、轴温报警装置和其他报警装置。( )(1.0分)
A. 对
B. 错
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(70851)荧光灯在低频工作时为电阻性负载。( )(1.0分)
A. 对
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(70852)在客车上安装宣传、引导标志及列车广告,须经铁路局主管部门批准,严禁在车内乱钉、乱贴、乱挂。( )(1.0分)
A. 对
B. 错
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(70853)荧光灯由灯管、镇流器和启动电容三部分组成。( )(1.0分)
A. 对
B. 错
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(70854)空调客车的空调温控器应设定为:冬季14~16 ℃,夏季22~24 ℃。( )(1.0分)
A. 对
B. 错
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(70855)逆变器是一种将交流电变换为直流电的装置。( )(1.0分)
A. 对
B. 错
【判断题】
(70856)轴温达到110 ℃或超过外温加80 ℃时摘车处理。( )(1.0分)
A. 对
B. 错
【判断题】
(70857)镇流器在荧光灯电路中的作用是限制灯管的电流。( )(1.0分)
A. 对
B. 错
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(70858)集中供电空调列车,库内停留期间须使用外接地面电源进行检修。( )(1.0分)
A. 对
B. 错
【判断题】
(70859)接触器是一种自动的电磁开关,用来接通和断开动力电路。( )(1.0分)
A. 对
B. 错
【判断题】
(70860)接触器与继电器的结构和工作原理基本相同,可以互换使用。( )(1.0分)
A. 对
B. 错
【判断题】
(70861)全列空调列车供电制式不需一致。( )(1.0分)
A. 对
B. 错
【判断题】
(70862)中间继电器只能作转换控制信号的中间元件使用,不能用来直接通断电路。( )(1.0分)
A. 对
B. 错
【判断题】
(70863)采用密接式车钩的列车,须备有中间体过渡车钩、15号过渡车钩、密接式车钩。( )(1.0分)
A. 对
B. 错
【判断题】
(70864))热继电器的整定电流若只稍大于电动机的额定电流,则电动机不能正常启动。( )(1.0分)
A. 对
B. 错
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