【判断题】
额定电压为 35kV 的跌开式高压熔断器用于保护容量不大于（ 320） kVA的变压器
查看试卷，进入试卷练习
微信扫一扫，开始刷题
相关试题
【判断题】
补偿电容器组断后仍有残余电压，若需再次合闸，应在其断电（ 3） min 后进行
【判断题】
下列共射极电路特点说法正确的是（电流、电压和功率放大倍数以及稳定性与频率特性较差）
【判断题】
填写工作票时要字体规范，字迹清楚，不得涂改和不得用（铅笔）填写
【判断题】
TT 系统中第二个 T 表示（保护接地）
【判断题】
（安全带）用具是登高作业时必须必备的保护用具
【判断题】
变电所设置进线段保护的目的是（限制雷电浸入波幅值）
【判断题】
防雷装置的引下线一般采用圆钢或扁钢，如用钢绞线，其截面积不应小于（ 25） mm2
【判断题】
箱式变电站 10kV 配电装置不用断路器，常用（负荷开关）加熔断器和环网供电装置
【判断题】
对于 10kV 电容器的电流速断保护，动作时间为（ 0）秒
【判断题】
三相星形接线的电源或负载的线电压是相电压的（根号三）倍，线电流与相电流不变
【判断题】
接地电阻测量仪用 120r/min 的速度摇动摇把时，表内能发出（ 110）Hz、100v 左右的交流电压
【判断题】
供电系统供电频率的允许偏差对电力网容量在 300 万 KW以下者绝对值不大于（ 0.5 ） HZ
【判断题】
在 10kV 系统中，氧化锌避雷器较多并联在真空开关上，以便限制（截流过电压）
【判断题】
架空电力线路的铁塔刷油工作每（ 3-5 年）进行一次
【判断题】
各种变配电装置防止雷电侵入波的主要措施是（采用（阀型）避雷器）
【判断题】
变压器保护中，属于后备保护的是（过电流）保护
【判断题】
紧急事故处理时可不用填写（倒闸操作票），但应事后将有关事项记入值班日志，并及时汇报
【判断题】
变压器高压侧额定电流可按容量（ kVA）的（ 6） %进行估算
【判断题】
变压器（重瓦斯）保护动作后在未查明原因前不能再次投入运行
【判断题】
对于 10kV 的配电装置，常用的防雷措施是（在母线上装设阀型避雷器）
【判断题】
我国输电线路的交流电压最高等级为（ 1000） kV
【判断题】
干粉灭火器适用于（ 0.6 ） kV 以下线路带电灭火
【判断题】
电流对于人体的伤害可分为电伤、（电击）两种类型
【判断题】
负荷开关与（断路器）配合，可保护电力线路
【判断题】
电磁操作机构是利用（电磁功）产生的机械操作力矩使开关完成合闸的
【判断题】
2000kW以下的高压电动机应采用（过流速度）保护。
【判断题】
在办理停电、送电手续时，严禁（约定时间）停电、送电
【判断题】
电气设备检修时，工作的有效期限以（批准的检修期限）为限。
【判断题】
架空电力线路跨越架空弱电线路时，对于一级弱电线路的交角应大于等于（ 45°）。
【判断题】
万用表测量电阻时，如果被测电阻未接入，则指针指示（∞）位置。
推荐试题
【单选题】
Tom is a book lover. ______ likes reading very much.
A. He B. She C. You D. It
【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
【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
【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
【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
【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
【单选题】
7. She ______ very hard since she came to our school.
A. studies B. has studied C. is studying D. studied
【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
【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
【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
【单选题】
11. How do you like the dishes, Eric?
— Fantastic! Nothing tastes ________.
A. nice B. better C. terrible D. worse
【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
【单选题】
13.You can save money _______ you buy cheaper things.
A. before B. unless C. if D. until
【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
【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
【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
【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
【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
【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
【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
【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
【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
【单选题】
23. It was dark, ______ I couldnt see what was happening.
A. or B. though C. but D. so
【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
【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
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
【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
【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
【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．
【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．
【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．
【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
【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.
【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
【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.
【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.
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
【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
【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
【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
