【判断题】
用试电笔在低压导线上测试，氖管不亮后就可用电工刀剥绝缘
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相关试题
【判断题】
《农村低压电网剩余电流动作保护器配置导则》规定：三相配电变压器低压侧配置的总保护器应安装在配电变压器低压总出口处
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万用表使用完毕后，应将转换开关旋至交流电压最低档或空档
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10kV杆上避雷器安装前应检查避雷器瓷套无裂纹及放电痕迹，无破损现象，外观清洁，合成式避雷器检查合成绝缘套无皲裂和破损现象
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塑料软线绝缘层只能用电工刀剖削，不可用剥线钳或钢丝钳来剖
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18m电杆单点起吊时，由于预应力杆有时吊点处承受弯矩较大，因此必须采取加绑措施来加强吊点处的抗弯程度
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如果电力系统某点发生不对称短路，则短路点的三相电压将为一组不对称三相电压
【判断题】
定子绕组是交流电动机的核心部分，也是最容易产生故障的部分
【判断题】
柱上断路器的主要技术参数包括：额定电压、额定电流、额定开断电流和极限开断电流、断流容量、极限通过电流、合闸时间、开断时间和固有分闸时间
【判断题】
配电线路拉线的主要作用是平衡导(地)线的不平衡张力；稳定塔杆、减少塔杆的受力
【判断题】
起重时，如需多人绑挂时，应由一人负责指挥
【判断题】
使用钳形电流表时，应戴绝缘手套，穿绝缘鞋。观测表针时，要特别注意人体、头部与带电部分保持足够的安全距离
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在R-L-C并联电路中，当感抗等于容抗时，电路处于谐振状态，电路呈电阻性
【判断题】
钳形电流表钳形铁心不要靠近变压器和电动机的外壳以及其他带电部分，以免受到外界磁场的影响
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应有专人负责配电设备信息录入及更新工作，要确保信息录入的及时性、准确性和完整性
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电气火灾和爆炸，是指由于电气方面的原因而引起的火灾和爆炸
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将电容器接在交流电源上，并略去电容器中的电阻，这一电路叫做纯电容电路
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大工业用户的生产照明用电应执行大工业电价
【判断题】
10kV配电线路以变电所的母线为单位设置电压监测点
【判断题】
人们常用“负载大小”来指负载电功率大小，在电压一定的情况下，负载大小是指通过负载的电流的大小
【判断题】
万用表在接入电路进行测量前，需先检查转换开关是否在所测档位上
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100kVA及以下的非工业用户不实行《功率因数调整电费办法》
【判断题】
塑料电缆和橡皮电缆绝缘较好，存放保管时可不密封端口
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兆欧表有“线”(L)、“地”(E)和“屏”(G)三个接线柱，进行一般测量时，只要把被测绝缘电阻接在“L”和“E”之间即可
【判断题】
商业、非居民照明及动力用电实行《功率因数调整电费办法》
【判断题】
坚持“先外后内”的原则，当有客户办理业务时，应办完手中的工作，马上接待客户
【判断题】
绝缘手套进行外观检查时如发现穿孔或漏气、损坏应停止使用
【判断题】
10kV杆上避雷器接地引线就与设备外壳连接，不能迂回盘绕，应短而直
【判断题】
6kV及以上的电缆一般都有导体屏蔽层和绝缘屏蔽层
【判断题】
在对称三相电路中，负载作三角形连接时，线电流是相电流的3倍，线电流的相位滞后相应的相电流30°
【判断题】
在R—L串联电路中，总电压超前总电流的相位角就是阻抗角，也就是功率因数角
【判断题】
10kV电力变压器过负荷保护动作后，发出警报信号，不作用于跳闸
【判断题】
断路器设备线夹选择时应与导线相匹配，确保连接紧密、可靠
【判断题】
电能表的型号是用字母和数字的排列来表示的。一般由类别代号、组别代号、用途代号、设计序号组成
【判断题】
《农村供电营业规范化服务窗口标准》要求：居民办理交费业务的高峰期要适当增设收费窗口，缩短收费时间
【判断题】
悬式绝缘子多组成绝缘子串，用于10kV及以上的线路
【判断题】
在低电价线路上接高电价设备，应补交的差额电费，时间难以确定按6个月计算
【判断题】
距接地体越远，接地电流通过此处产生的电压降就越小，电位就越低
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【单选题】
Those gifts of rare books that were given to us were deeply _________.___
A. appreciated
B. approved
C. appealed
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It is our ___________ policy that we will achieve unity through peaceful means.___
A. consistent
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He is __________ about his chances of winning a gold medal in the Olympics next year.___
A. optimistic
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The director was critical _______________ the way we were doing the work.___
A. at
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In a sudden _____________ of anger, the man tore up everything within reach.___
A. attack
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In Britain people _____________ four million tons of potatoes every year.___
A. swallow
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I'd _____________ his reputation with other farmers and business people in the community, and then make a decision about whether or not to approve a loan.___
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She cooked the meat for a long time so as to make it _____________ enough to eat.___
A. mild
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The computer revolution may well change society as _____________ as did the Industrial Revolution.___
A. certainly
B. insignificantly
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A lot of ants are always invading my kitchen. They are a thorough ___________.___
A. nuisance
B. trouble
C. worry
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As we can no longer wait for the delivery of our order, we have to _________ it.___
A. postpone
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When a fire _________ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.___
A. broke of
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The destruction of these treasures was a loss for mankind that no amount of money could __________.___
A. stand up to
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The student was just about to ___________ the questions, when suddenly he found the answer.___
A. arrive at
B. submit to
C. work out
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When there are small children around, it is necessary to put bottles of pills out of _________.___
A. reach
B. hand
C. hold
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The _________ of blood always makes him feel sick.___
A. sight
B. view
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In Britain, the best season of the year is probably __________ spring.___
A. later
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Free medical treatment in this country covers sickness of mind as well as _________ sickness.___
A. normal
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Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _________ to his confusion.___
A. extended
B. amounted
C. added
D. turned
【单选题】
A completely new situation will ___________ when the examination system comes into existence.___
A. arise
B. rise
C. raise
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【单选题】
Cancer is second only __________ heart disease as a cause of death.___
A. of
B. to
C. with
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The manager needs an assistant that he can _________ to take care of problems in his absence.___
A. count on
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C. count up
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【单选题】
We gave out a cheer when the red roof of the cottage came __________ view.___
A. from
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They took ________ measures to prevent poisonous gases from escaping.___
A. fruitful
B. beneficial
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Doing your homework is a sure way to improve your test scores, and this is especially true _______ it comes to classroom tests.___
A. when
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C. before
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【单选题】
In developing countries people are _______ into overcrowded cities in great numbers.___
A. breaking
B. filling
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There are other problems which I don't propose to ____________ at the moment.___
A. go into
B. go around
C. go for
D. go up
【单选题】
It is quite necessary for a qualified teacher to have good manners and _________ knowledge.___
A. extensive
B. expansive
C. intensive
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【单选题】
I'm not sure whether I can gain any profit from the investment, so I can't make a(n) ______ promise to help you.___
A. exact
B. defined
C. definite
D. sure
【单选题】
The sports meet, originally due to be held last Friday, was finally ________ because of the bad weather.___
A. set off
B. broken off
C. worn off
D. called off
【单选题】
It has been revealed that some government leaders _______ their authority and position to get illegal profits for themselves.___
A. employ
B. take
C. abuse
D. overlook
【单选题】
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ________.___
A. intention
B. attempt
C. purpose
D. desire
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The store had to _______ a number of clerks because sales were down.___
A. lay out
B. lay off
C. lay aside
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All the students in this class passed the English exam ________ the exception of Li Ming.___
A. on
B. in
C. for
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【单选题】
Writing is a slow process, requiring _______ thought, time, and effort.___
A. significant
B. considerable
C. enormous
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Lightning is a ______ of electrical current from a cloud to the ground or from one cloud to another.___
A. rush
B. rainbow
C. rack
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I caught a ________ of the taxi before it disappeared around the corner of the street.___
A. vision
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Students or teachers can participate in excursions to lovely beaches around the island at regular _________.___
A. gaps
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Physics is ________ to the science which was called natural philosophy in history.___
A. alike
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The new appointment of our president _______ from the very beginning of next semester.___
A. takes effect
B. takes part
C. takes place
D. takes turns
