电气基础的知识点测试题答案

1、电气基础知识测试题姓名 成绩一、单选题（每题3分，共60分）1、电压也称（C）。A电动势B电位C同一电场两点之间的电位差2、当n个阻值串联时，其总阻值（A）。A变大B 变小C不变3、当n个阻值并联时，其总阻值（C）。A变大B 变小C比最小的电阻还小4、变压器的变比与（A）有关。A 一、二次侧电压 B 铁芯构成特性 C 电网频率的高低5、三相三线制供电，主要是供给（C）0A照明B家用电器C 动力负荷&变压器主要改变（B）oA频率B电压C功率7、万用表的转换开关是实现（A）oA各种测量种类及量程的开关B万用表电流接通的开关C接通被测物的测量开关8、电力变压器的油起（A）作用。A绝缘和灭弧B绝缘和防

2、锈 C绝缘和散热9、两只额定电压相同的电阻，串联接在电路中，则阻值较大的电阻（B）oA发热量较小B发热量较大C没有明显差别10、直接将电能送到用户的网络称为（C）oA发电网B输电网C配电网11、装设接地线时，应（B）A先装中相B先装接地端，再装两边相C先装导线端12、室外配电变压器应在变压器（B）装设避雷器。A低压侧B高压侧C中性点13、继电保护装置是由（A）组成的。A各种继电器B二次回路各元件C包括各种继电器和仪表回路14、多台电动机均有一台变压器供电时，当电动机投入运行时，应按容量（B）分别进行启动。A别进行启动。A由小到大由大到小 C按操作方便15、为防止感应过电压，母线或输电线路应（C

3、 ）避雷针。A多装B靠近C远离16、高压断路器具有开断正常负荷和（C）的能力。A过载B短路故障C过载、短路故障17、电容器中储存的能量是（A）。A电场能B磁场能C热能18、交流电流表或交流电压表指示的数值是（A）A有效值B平均值C最大值19、但凡电气设备对地电压在（B）及以上的叫高压电气设备。A大于380V B大于250V C大于220V20、电流流过人体，造成对人体内部器官的伤害称为（B）A电伤B电击C电烙印二、填空题（每空2分，共40分）1、 我国规定的交流电力系统的额定频率为。（ 50Hz）2、 总装机容量是指系统中所有发电机额定有功功率的。（总和）3、 当某一电力线路发生接地时，距接地

4、点越近，跨步电压。（越高）4、 电力系统按其作用不同可分为 和。（一次系统、二次系统）5、 电力系统主要包括、和。（发电厂、输电网络、配电网络、用户）&将电气设备不带电的金属部分与接地装置相接叫 接地。（保护）7、 电缆及电容器接地前应 充分放电。（逐相）8、 在接线路时，先接零线，后接 。（火线）9、 由、和 三部分组成的电线称为电缆。（芯线、绝缘层、保护层）10、 高压断路器：又称，它不仅可以切断或闭合高压电路中的空载电 流和负荷电流，而且当系统发生故障时，通过继电保护装置的作用，切断过负荷 电 流和短路电流。（高压开关）11、是保护电力系统中电气设备的绝缘免受沿线路传来的雷电过电压 损害

5、的一种保护设备。（避雷器）12、风力发电厂将 通过风力机转化为 来驱动发电机发电。（风能、机械能）知识赠送以下资料英语万能作文（模板型）Along with the adva nee of the society more and more problems are brought to our atte nti on, one of which is that.随着社会的不断发展，出现了越来越多的问题，其中之一便是As to whether it is a blessing or a curse, however, people take differe ntattitudes.然而，对于此

6、类问题，人们持不同的看法。（Hold different attitudes持 不同的看；Come up with different attitudes有不同的看法）As society develops, people are attach ing much importa nee to.随着社会的发展，人们开始关注People are attach ing more and more importa nee to the in terview duri ng job hunting求职的过程中，人们慢慢意识到面试的重要性。As to whether it is worthwhile .,

7、there is a long-running con troversial debate. It is quite n atural that people from differe nt backgro unds may have diverge nt attitudes towards it.关于是否值得勺问题，一直以来争论不休。当然， 不同的人对此可能持不同的观点。In the process of modern urban development, we often find ourselves in a dilemma.在都市的发展中，我们往往会陷入困境。Rece ntly the

8、 phe nomenon has aroused wide concern, some people are in alarm that最近，这种现象引起了人们的广泛关注，有人开始担心The huma n race has en tered a completely new stage in its history, with theincreasingly rapid economic globalization and urbanization, more problems are brought to our atte nti on.人类进入了一个历史的崭新的阶段，经济全球化、都市化的速

9、度不断加快，随之给我们带来了很多问题。 plays such an importa nt role that it undeni ably becomes the biggest concern of the present world, there comes a question, is it a bless ing or a curse?得非常重要而成为当今世界所关注的最大的问题，这是无可厚 非的。不过，问题是：我们该如何抉择?Now we are en teri ng a new era, full of opport un ities and challe nges,现在我们正在进入

10、一个充满机会和挑战的新时代。People from differe nt backgro unds would put differe nt in terpretati ons on the same case不同行业的人对同一种问题的解释不尽相同。The con troversial issue is ofte n brought into public focus. People from differe nt backgro unds hold differe nt attitudes towards the issue.这中极具争议性的话题往往很受社会的关注。不同的人对此问题的看法也不

11、尽相同。Whe n asked .， some people think.while some prefer.说至u，有人认为，而另一些人则认为 。Just as the say ing goes: so many people, so many min ds. It is quite understa ndable that views on this issue vary from pers on to pers on.俗话说，叫不同的人对此有不同的看法是可以理解的。To this issue, differe nt people come up with various attitude

12、s.对于这个问题，不同的人持不同的观点。There is a good side and a bad side to everythi ng, it goes without say ing that.万事万物都有其两面性，所以，勿庸置疑，。When it comes to . ., most people believe that . ., but other people regard .as 提到 问题，很多人认为 不过，一些人则认为 是When faced with., quite a few people claim that ., but other people thi nk a

13、s.提到 问题，仅少数人认为，但另一些人则认为。There is a public con troversy no wadays over the issue of . There whocriticize . .argue that ., they believe that .,but people who favor ., on the other hand, argue that.目前，问题争议较大。批判 的人认为，他们认为，不过，另一方面，赞同 的人则认为Some people are of the opinion that.有些人认为Many people claim that.很多

14、人认为A majority of绝大多数A large nu mber ofSome people contend that . has proved to bring many adva ntages (disadva ntages)有些人认为 很多有利之处(不利之处)。Those who argue for . say that . .economic development of the cities.觉得的人认为，城市的经济发展。Some people advocate that 有些人在坚持认为。They hold that .他们认为 。People, who advocate t

15、hat ., have their sound reas ons (gro un ds)坚持认为 的人也有其说法(依据)。Those who have already ben efited from practic ing it sing high praise of it.那些从中受益的人对此大家褒奖。Those who stron gly approve of . . have coge nt reas ons for it.强烈认同 的人有很多原因。Many people would claim that.有人会认为Many people would claim that.有人会认为Pe

16、ople who support . give some or all of the follow ing reas ons.那些支持 点的人列出了如下原因： 。But others hold the view that .但是，另外一些人则认为。观点的用词：Attitude, opin io n,与其搭配的动词以及词组：Take, have,come up with, set forth, put forwardBut on the other hand, there are also quite a few people who str on glyadvocate that.,.不过，另

17、一方面，也有少部分人坚持认为But people who are ., on the other hand , maintain that.不过，另一方面，的人认为。However, there are a large nu mber of people who hold a differe nt viewconcerning this case.然而，很多人对此有不同的看法。问题用词： Issue, phenomenon 后接介词,on, over 等。However, some others argue that.然而，另一些人贝 U 认为However, there are also s

18、ome others who contend that.然而，也有人认为。But other people set forth completely totally different argument con cer ning this case.不过，对于此，另一些人则持完全不同的观点。Some people exam ine this issue from ano ther an gle.有的人用另一角度来看这一问题。On the other hand, there are also many opp onents who stron gly .另一方面，也有很多反对的人，他们认为。Ac

19、cord ing to my pers on ality and fondn ess, I would prefer . . rather than 根据我的个性以及兴趣，我选择 不会选择Pers on ally, I side with the latter (former) opin io n.就我个人而言，我支持后者就我个人而言，我支持后者（前者）Pers on ally, Iam in favor of the former point of view.Pers on ally, Iam in favor of the former point of view.就我个人而言，我较同意前

20、一种看法。就我个人而言，我较同意前一种看法。To my point of view 我认为To my mind, the advantages far overweigh thedrawbacks(disadva ntages, shortco min gs)我认为，优点胜过缺点。For my part, I sta nd on side of the latter opinion that.就我而言，我较赞同后一种观点As far as I am concern ed, I am in cli ned to be on the side of the latterview.在我看来，我较同意

21、后一种观点。After a thorough consideration, for my part, I am in favor of the latterview that.经过深思熟虑，我较支持后一种看法，亦即If asked to make a decision, I would prefer.如果真的需要作出选择，我宁愿展现问题篇问题的常用词： questi on, problem, issueRece ntly, the issue of . has bee n brought into public focus.近来，的问题引起了社会的广泛关注。Now we are enterin

22、g a brand new era full of opportunities and innovations, and great changes have taken place in people attitude towards some traditi onal practice.现在我们进入了一个充满机遇和创新的崭新时代，很多人对某些传统的看法也发生了很大改变。Rece ntly the issue of whether or not . has bee n in the limelight and has aroused wide concern in the public.近来

23、，是否 的问题已经非常明确而且引起了社会的广泛关注。The issue whether it is good or not to . . has aroused a heated discussion all over the coun try.的利与弊已在全国范围内引起热烈的讨论。At present, some people think . .while others claim . .Both sides have their merits.目前，一些人认为 而另一些人则认为。其实，两种观点都其可取之处People rarely reach点都其可取之处People rarely reachan absolute consen sus on such a controversial issue.对于这种极具争议的话题，我们很难作出绝对的回答。People from differe nt backgro unds would put differe nt in terpretati ons on the same case.不同行业的人对同一种问题的解释不尽相同。The co