【判断题】
低压负荷开关(铁壳开关)能使其中的隔离开关快速断开与闭合,取决于手动操作的快慢
A. 对
B. 错
查看试卷,进入试卷练习
微信扫一扫,开始刷题
答案
B
解析
暂无解析
相关试题
【判断题】
低压混凝土杆一般做成拔梢型,梢径一般为150mm或230mm
A. 对
B. 错
【判断题】
电动势的方向规定为高电位到低电位的方向,也就是电位降方向
A. 对
B. 错
【判断题】
电动势的实际方向规定为从正极指向负极
A. 对
B. 错
【判断题】
电杆装置各部螺栓穿向要求:顺线路者均由受电侧穿入
A. 对
B. 错
【判断题】
电和磁之间有一定的内在联系,凡有电荷存在,周围都存在有磁场
A. 对
B. 错
【判断题】
电荷在电路中无规则地运动叫电流
A. 对
B. 错
【判断题】
电缆沟内敷设电缆时,电缆必须放置在电缆支架上
A. 对
B. 错
【判断题】
电缆绝缘层的作用是保护电缆免受外界杂质和水分的侵入
A. 对
B. 错
【判断题】
电缆埋地敷设,在电缆下面应铺混凝土板或黏土砖
A. 对
B. 错
【判断题】
电缆排管敷设前,检查管子内部只要通畅,就可开始敷设
A. 对
B. 错
【判断题】
电缆直埋敷设,必须埋于冻土层以上
A. 对
B. 错
【判断题】
电缆直埋敷设必须拉直敷设,以节约电缆,减少投资
A. 对
B. 错
【判断题】
电力电缆由线芯和绝缘层组成
A. 对
B. 错
【判断题】
电力电容器只能并联在电力线路中,能改善电力系统的电压质量和提高输电线路的输电能力
A. 对
B. 错
【判断题】
电流表应并联在被测电路中
A. 对
B. 错
【判断题】
电流互感器二次侧具有多组绕组,若仅使用一组绕组,则为保证计量的准确性,其余绕组应保持开路状态
A. 对
B. 错
【判断题】
电流互感器二次回路接用熔断器可以防止过负荷电流流过互感器烧坏计量装置
A. 对
B. 错
【判断题】
电流互感器一次侧反接,为确保极性正确,二次侧不能反接
A. 对
B. 错
【判断题】
电流互感器一次绕组匝数多,二次绕组匝数少
A. 对
B. 错
【判断题】
电能表误差超出允许范围时,退补电费时间:从上次校验或换表后投入之日起至误差更正日止
A. 对
B. 错
【判断题】
电气图的表达形式有很多种类,简图是其中一种,简图就是简单的图
A. 对
B. 错
【判断题】
电气图上继电器的触点位置均是指“通电状态”
A. 对
B. 错
【判断题】
电器设备功率大,功率因数当然就大
A. 对
B. 错
【判断题】
电容C是由电容器上施加的电压大小决定的
A. 对
B. 错
【判断题】
电容器在正常情况下的操作,配电室停电操作时,应先拉开各路出线开关,后拉开电容器开关。配电室恢复送电时,应先合电容器开关,后合各路出线开关
A. 对
B. 错
【判断题】
电容器组可进行连续无间隔频繁停、送电操作
A. 对
B. 错
【判断题】
电容器组在正常情况下的投入或退出运行,应根据系统负荷大小来确定
A. 对
B. 错
【判断题】
电容器组自电网断开后5min后不得重复接入,但自动重复接入情况除外
A. 对
B. 错
【判断题】
电位高低的含义,是指该点对参考点间的电流大小
A. 对
B. 错
【判断题】
电压互感器二次回路连接导线的截面积应按照允许的电压降计算确定,但至少应不小于1.5mm2
A. 对
B. 错
【判断题】
电压互感器应接在电流互感器的电源侧
A. 对
B. 错
【判断题】
电压监测点必须装设自动记录型电压监测仪,连续不间断地进行监测统计和记录,并保证停电时永久不丢失已监测到的数据
A. 对
B. 错
【判断题】
电压三角形、阻抗三角形、功率三角形都是相量三角形
A. 对
B. 错
【判断题】
跌落式熔断器的遮断容量应大于安装地点的短路容量的上限,并小于其下限
A. 对
B. 错
【判断题】
跌落式熔断器的作用是保护下一级线路、设备不会因为上一级线路设备的短路故障或过负荷而引起断路器跳闸停电、损坏
A. 对
B. 错
【判断题】
蝶式绝缘子只用于线路档距较大的转角处
A. 对
B. 错
【判断题】
动力用电,不论高压或低压容量大小,一律执行分时电价
A. 对
B. 错
【判断题】
短路电流很大,产生的电动力就一定很大
A. 对
B. 错
【判断题】
对称分量法适用于任何电路
A. 对
B. 错
【判断题】
对称三相Y接法电路,线电压最大值是相电压有效值的3倍
A. 对
B. 错
推荐试题
【单选题】
Tom is a book lover. ______ likes reading very much. A. He B. She C. You D. It
A. A
B. B
C. C
D. D
【单选题】
—May I listen to the music here, Mr. White? —Sorry, you’d better it like that. A. not to do B. not do to C. dont do D. not do
A. A
B. B
C. C
D. D
【单选题】
3.—Did you have a good time at Lauras birthday party? — Yes, indeed. Its several years ________ I enjoyed myself so much. A. when B. before C. since D. that
A. A
B. B
C. C
D. D
【单选题】
4. —___________ is the Summer Palace from here? About three kilometers away. You can take the No. 35 bus. A. How long B. How far C. How often D. How much
A. A
B. B
C. C
D. D
【单选题】
5. I was looking for a birthday gift for my mother, but I couldnt find ______ suitable. A. anything B. something C. nothing D. everything
A. A
B. B
C. C
D. D
【单选题】
6. A friend of my ____ and I are going to visit_______ next week. A. father; Browns B. father's; Browns C. father; the Browns D. father's; the Browns
A. A
B. B
C. C
D. D
【单选题】
7. She ______ very hard since she came to our school. A. studies B. has studied C. is studying D. studied
A. A
B. B
C. C
D. D
【单选题】
8. — Who will send you to the new school, your mom or your dad? — _______. Ill go there by myself. A. Both B. Either C. Neither D. None
A. A
B. B
C. C
D. D
【单选题】
9.—Well do what we can ____English well this term. —It’s high time for you to work hard. A. study  B.to study  C. be studied   D. be studying
A. A
B. B
C. C
D. D
【单选题】
10. —I’m going to Flower Bookstore. Could you tell me ______? — Sorry, I don’t know. I’m new here. A. where it is B. where was it C. where is it D. where it was
A. A
B. B
C. C
D. D
【单选题】
11. How do you like the dishes, Eric? — Fantastic! Nothing tastes ________. A. nice B. better C. terrible D. worse
A. A
B. B
C. C
D. D
【单选题】
12. ______ Lin Feng has to work late, she always wears a smile on her face. A. Because B. If C. Until D. Though
A. A
B. B
C. C
D. D
【单选题】
13.You can save money _______ you buy cheaper things. A. before B. unless C. if D. until
A. A
B. B
C. C
D. D
【单选题】
14. We will have a _________ holiday after the exam. A. two-month B. two month’s C. two month D. two-months
A. A
B. B
C. C
D. D
【单选题】
15. —We will build an underground in Xuzhou before 2015. — Wow, _______! Will it pass our place? A. what an excited news B. how excited the news is C. what exciting news D. how exciting
A. A
B. B
C. C
D. D
【单选题】
16. — Emily, here’s a dictionary.I hope it will help you in some way. — Thank you.It’s ________ what I need. A. almost B. still C. only D. just
A. A
B. B
C. C
D. D
【单选题】
17. —Oh.I’m hungry.Mum, can I have the hamburger on the plate? —No.It tastes . A. terribly B. terrible C. good D. well
A. A
B. B
C. C
D. D
【单选题】
18. —We can invite our teachers to the farewell party next Saturday. —Yes, ______? I’ll call them at once. A. what for B. what C. why not D. why
A. A
B. B
C. C
D. D
【单选题】
19.You can ________ ask the old man to move away to any other place because he has lived ________ here for at least sixty years. A. hardly; alone B. hard; alone C. hardly; lonely D. hardly; lonely
A. A
B. B
C. C
D. D
【单选题】
20.—I’m going back to see my grandparents this weekend. —________. A. It’s very nice of you B. You’d better hurry C. Say goodbye to them D. Give my best wishes to them
A. A
B. B
C. C
D. D
【单选题】
21.—Why not take ____ umbrella with the sign “Made in China”? It is useful. —What _______ good advice it is!    A. an; a B. a; a C. an; \ D. \; a
A. A
B. B
C. C
D. D
【单选题】
22. —Do you know the boy________ is sitting next to Peter? — Yes. He is Peter’s friend. They are celebrating his ________ birthday. A. who; ninth B. that; ninth C. /; ninth D. which; ninth
A. A
B. B
C. C
D. D
【单选题】
23. It was dark, ______ I couldnt see what was happening. A. or B. though C. but D. so
A. A
B. B
C. C
D. D
【单选题】
24.—You can use MSN to talk with Vivien on the Internet. —I know. But can you tell me ________? A. what I can use it B. when I can use it C. why can I use it D. how can I use it
A. A
B. B
C. C
D. D
【单选题】
25. _______ are you going to the School Uniform Exhibition, Amy ? To learn about different styles of school uniform. A. What B. Where C. Which D. Why
A. A
B. B
C. C
D. D
【单选题】
( ) 26. Where does the writer of "The little Prince" come from? A.England. B.France. C.America. D.China.
A. A
B. B
C. C
D. D
【单选题】
( ) 27. What does the prince do after the fox tells him a secret? A.He cares more about a flower and a sheep. B.He meets many more strange adults on other planets. C.He realizes his love for the rose and he goes back to his planet.   D.He discovers interesting things such as a snake, other roses and a fox
A. A
B. B
C. C
D. D
【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________. A.the adult world B.the planet B -612 C.a rose and a fox D.the adventure of a young prince
A. A
B. B
C. C
D. D
【单选题】
( ) 29. What is the writer's main purpose(目的)in writing this passage?    A.To tell the readers his life story.    B.To tell people what kind of person his father was.    C.To tell the readers what present he got from his father.    D. To let people know how poor he was.
A. A
B. B
C. C
D. D
【单选题】
( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
A. A
B. B
C. C
D. D
【单选题】
( ) 31. What would someone learn from this passage?    A.How to live by oneself. B.How to stand on one's own feet.    C.What a good father should do. D.What the self-important is like.
A. A
B. B
C. C
D. D
【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
A. A
B. B
C. C
D. D
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her? A. She had seven tickets. B. She hoped to please others. C. She knew the car drivers well. D. She wanted to show kindness.
A. A
B. B
C. C
D. D
【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
A. A
B. B
C. C
D. D
【单选题】
( ) 35. Who came up with the phrase according to the passage? A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
A. A
B. B
C. C
D. S
【单选题】
( ) 36. What can we infer from the last paragraph? A. People should practice random kindness to those in need. B. People who receive kindness are likely to offer it to others. C. People should practice random kindness to strangers they meet. D. People who receive kindness are likely to pay it back to the giver.
A. A
B. B
C. C
D. D
【单选题】
( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
A. A
B. B
C. C
D. D
【单选题】
( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
A. A
B. B
C. C
D. D
【单选题】
( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
A. A
B. B
C. C
D. D
【单选题】
( ) 40. The best title of the passage is ___________. A. Rivers in Cities B. The importance of Rivers C. Transportation D. Natural Resources
A. A
B. B
C. C
D. D