相关试题
【判断题】
空压机扳键开关置“强泵”位，空气压缩机1、2均投入工作。
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和谐型电力机车转向架采用滚动抱轴承半悬挂结构，一系采用高圆螺旋弹簧。
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BPCP模块控制均衡风缸的压力，相当于DK-1制动机分配阀的作用。
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和谐型电力机车主电路主要由网侧电路、主变压器、主变流器及牵引电动机等组成。
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和谐型电力机车压缩机加热回路是辅助电路的一部分。
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和谐型电力机车网压低于17.5kV时，低压保护环节动作，网压高于31.5kV时，过压保护环节动作。
【判断题】
在“定速控制”状态，当机车实际速度低于“目标速度－2km/h”时，TCMS控制机车进入牵引工况。
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主断路器在主电路发生过流、接地、零压等故障时，须手动断开主断路器。
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若非操作端大闸在紧急位时会造成操作端大闸无法缓解，制动显示屏上显示“制动机故障－014。
【判断题】
和谐型电力机车一组辅助变流器故障后可以由另一组辅助变流器对全部辅助机组供电。
【判断题】
和谐型电力机车采用微机网络控制系统，实现了逻辑控制、自诊断功能，而且实现了机车的网络重联功能。
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自阀运转位20CP响应列车管压力变化，将作用管压力排放。
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和谐型电力机车有6个带停放单元的制动缸。
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高压接地开关的主要功能是：当进行机车检查、维护或修理时，把主断路器两侧电路接地。
【判断题】
和谐型电力机车，辅助变流器过流故障在5分钟内连续发生两次，该辅助变流器将被锁死，需要解锁时必须切断辅助变流器的控制电源，才可解锁。
【判断题】
和谐型电力机车无动力回送时，总风缸向列车管限制充风压力为360kPa左右。
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和谐型电力机车自阀紧急位时，其上的机械阀动作，列车管压力排向大气。
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正常情况下，油泵和水泵电机电源来自辅助变流器1。
【判断题】
在本机模式下，16号管增加的压力同列车管减少的压力的比率为3.5：1。
【判断题】
20CP响应手柄的不同位置，使制动缸产生作用压力为0―350kPa。
【判断题】
选择F3键“电空制动”并检查制动屏设置是否正确。
【判断题】
拉车长阀（或紧急制动阀）时，机车会产生紧急制动作用，但均衡风缸压力不变。
【判断题】
机车乘务员在退勤之前，应将升弓风缸内压缩空气充至900kPa，然后开放塞门U77以备机车再次使用。
【判断题】
为了确保适应机车状况的冷却风量和降低运转声音，两台复合冷却器风机和六台牵引通风机电机按照CVCF控制模式进行设定。
【判断题】
和谐型电力机车正常运行时，辅助变流器1工作在CVCF方式，辅助变流器2工作在VVVF方式，分别为机车辅助电动机供电。
【判断题】
高压隔离开关用来隔离故障受电弓，以免影响机车运行。
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机车停车后，将弹停制动缸中的压力空气排空，弹停装置动作，机车缓解。
【判断题】
和谐型电力机车牵引、制动控制采用恒牵引力（制动力）、准恒速特性控制方式。
【判断题】
主手柄在任意位置时，警惕按钮均可按下。
【判断题】
20CP本机状态时，通过相应列车管减压和单缓指令，产生平均管压力。
【判断题】
和谐型电力机车最高允许速度100km／h。
【判断题】
和谐型电力机车换向手柄置于0位，各辅机正常工作。
【判断题】
牵引电动机由定子、转子、轴承和速度传感器四大部分组成。
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和谐机车运行时，正常情况下，非操作端的主压缩机工作。
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高压接地开关上配有两把蓝色钥匙和黄色钥匙。
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和谐型电力机车上蓝色钥匙用于控制主断路器的气路。
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辅助电气系统采用三组辅助变流器，能分别提供VVVF和CVCF三相辅助电源辅助机组进行分类供电。
【判断题】
和谐机车牵引列车运行时，司机施行大闸制动时，机车上电制，车辆上空气制动。
推荐试题
【单选题】
中队战斗编成通常可根据火灾扑救对象的燃烧面积和___等因素进行编配。
A. 人员装备实力
B. 辖区火灾特点
C. 辖区水源分布情况
D. 中队执勤力量
【单选题】
中队___是形成战斗编成的前提和基础，是中队灭火救援能力强弱的关键因素，它主要由中队车辆装备配备情况、人员数量和人员训练情况所决定。
A. 人员装备实力
B. 辖区火灾特点
C. 辖区水源分布情况
D. 中队执勤力量
【单选题】
___主要由辖区内建筑物的数量、高度、耐火等级以及建筑物内可燃物的数量所决定，它是确定中队战斗编成的主要依据。
A. 人员装备实力
B. 辖区火灾特点
C. 辖区水源分布情况
D. 中队执勤力量
【单选题】
___主要由市政供水管网、消防水池、天然水源等组成，它是确定战斗展开模式的主要依据。
A. 人员装备实力
B. 辖区火灾特点
C. 辖区水源分布情况
D. 中队执勤力量
【单选题】
施救5楼被困人员，不宜使用的装备器材是___。（易）
A. 救生绳
B. 15米金属拉梯与挂钩梯联用
C. 救生气垫
D. 举高消防车
【单选题】
十五米拉梯与挂钩梯配合使用可攀登___层以上楼层。（易)
【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
