【单选题】
HXD3电力机车整体的车内的增压空气量是___m3/s 。
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相关试题
【单选题】
HXD3电力机车主变流器UM1内部可以看成由___个独立的“整流—中间电路—逆变”环节构成。
【单选题】
HXD3电力机车的___个牵引逆变器分别向6台牵引电动机供电。
【单选题】
CCBⅡ制动机实施紧急制动时，送入TCMS___撒砂指令信号要求TCMS根据机车运行方向，进行撒砂控制。
【单选题】
HXD3电力机车冷却介质流量计的流量为___L/min。
【单选题】
HXD3电力机车控制接地自动开关为QA___。
【单选题】
HXD3电力机车蓄电池自动开关为QA___。
【判断题】
HXD3电力机车辅助电气系统分别提供 VVVF 和 CVCF 三相辅助电源，对辅助机组进行分类供电。
【判断题】
HXD3电力机车一组辅助变流器故障后可由另一组辅助变流器对部分辅助机组供电。
【判断题】
HXD3电力机车转向架采用滚动抱轴承全悬挂结构。
【判断题】
HXD3电力机车6台牵引电动机采用6台牵引风机进行独立冷却。
【判断题】
HXD3电力机车6台牵引风机除对牵引电动机的冷却外，还用来对车内微增压。
【判断题】
HXD3电力机车2台复合冷却器采用2台冷却风机进行独立冷却。
【判断题】
HXD3电力机车复合冷却器用送风机：采用两段轴流风扇、外框和叶片间距变大，防止冻结、防止噪音。
【判断题】
HXD3电力机车主变压器的储油箱与主变压器用软管连接。
【判断题】
HXD3电力机车采用 DSA200 型受电弓，弓内装有自动降弓装置，当弓网故障时，可自动降弓保护。
【判断题】
HXD3电力机车高压电压互感器次边输出还可为原边电压的检测和电度表的计量提供电压输入。
【判断题】
HXD3电力机车回流装置保证网侧向钢轨的回流作用，同时保护机车轮对轴承不受电蚀，保证机车可靠接地。
【判断题】
HXD3电力机车电流互感器 TA1是为电度表的计量提供电流输入，属于测量用互感器。
【判断题】
智能型电度表 PWH，通过采集原边低压电流互感器 TA2 和高压电压互感器 TV1 提供的电流和电压信号来实现机车牵引、再生电能的计量。
【判断题】
HXD3电力机车黄色钥匙用于控制受电弓的升弓气路。
【判断题】
HXD3电力机车黄色钥匙用于打开机械室天窗或高压电器柜门。
【判断题】
HXD3电力机车6组牵引变流器的主电路和控制电路相对独立，分别为6个牵引电动机提供交流变频电源。
【判断题】
当HXD3电力机车6组牵引变流器其中一组或几组发生故障时，通过 TCMS 微机显示屏，利用触摸开关将故障的牵引变流器切除，剩余单元仍可继续工作。
【判断题】
当HXD3电力机车整台机车的 6 个轴的轮径差、轴重转移及空转等可能引起的负载分配不均匀时，可以通过牵引变流器的控制进行适当的补偿。
【判断题】
HXD3电力机车辅助变流器采用软起动方式进行起动，除空气压缩机电动机外，其他辅助电动机也随之起动。
【判断题】
HXD3电力机车辅助变流器UA11、UA12内部，分别设有2套接地保护装置。
【判断题】
HXD3电力机车辅助变流器将被锁死后，必须切断辅助变流器的控制电源，才可解锁。
【判断题】
HXD3电力机车每组辅助变流器，均可向110V充电模块提供DC350电源。
【判断题】
HXD3电力机车辅助变流器向110V充电模块输出电源回路通过熔断器DF进行短路过载保护。
【判断题】
HXD3电力机车熔断器DF出现熔断后，辅助变流器将通知微机控制系统TCMS，进行110V 充电模块输入电源的转换。
【判断题】
当HXD3电力机车压缩机进行低温加热时，压缩机可以正常工作。
【判断题】
HXD3电力机车复合冷却器上部为水散热器，用于冷却变流器，下部为油散热器，用于冷却主变压器。
【判断题】
HXD3电力机车在网压31kV～31.3kV范围内机车功率线性下降至零。
【判断题】
HXD3电力机车在网压22.5kV～17.5kV和17.5kV～17.2kV范围内机车功率按相同斜率线性下降。
【判断题】
HXD3电力机车车体侧面不设进风口，以提高车体作业的效率。
【判断题】
HXD3电力机车复合冷却器采用油冷对主变压器冷却。
【判断题】
HXD3电力机车采用水冷复合冷却器采用油冷对主变流装置冷却。
【判断题】
HXD3电力机车空气压缩机的冷却风通过设置在风道内的转换叶片，进行机械室回流。
【判断题】
HXD3电力机车电度表既可查询近期每天的电能消耗及能量的反馈，还可查询当时的原边电压.电流及功率因数等。
推荐试题
【单选题】
Are you feeling better today, Jack?___
A. There must be something wrong.
B. Just have a good rest.
C. Yes, thank you, doctor. But I still don't feel good.
D. Don’t worry about me.
【单选题】
Thank you so much for your lovely gift.___
A. Never mind.
B. I'm glad you like it.
C. Please don't say so.
D. No, It's not so good.
【单选题】
Would you like something to drink? What about a cup of tea?___
A. No, thanks.
B. No, I wouldn’t
C. Yes, I want.
D. Yes, I like.
【单选题】
What's the problem with your bike?___
A. Not at all.
B. Good, thank you.
C. Nothing serious.
D. Sure.
【单选题】
Good morning, John. How are you doing?___
A. I'm pleased
B. Good night.
C. Not so bad. And you?
D. How do you do?
【单选题】
How do you do?___
A. Fine, thank you.
B. How do you do?
C. Not too bad.
D. Very well.
【单选题】
Good-bye for now.___
A. The same to you.
B. That's OK
C. See you.
D. Long time no see.
【单选题】
Hello, how are you?___
A. Hello, how are you?
B. How do you do?
C. Fine, thank you.
D. That's OK.
【单选题】
I didn't mean to do that. Please forgive me。___
A. Not too bad.
B. That's all right
C. It's a pleasure.
D. Thank you.
【单选题】
Thank you for your invitation.___
A. It doesn’t matter.
B. It's a pleasure.
C. It's a small thing.
D. I'll appreciate it.
【单选题】
What a beautiful dress you have on today!___
A. It is suitable for me.
B. No, it isn’t.
C. You want to have one, too?
D. Thank you.
【单选题】
I think he is a good lecturer.___
A. Sorry, it doesn’t matter.
B. So do I.
C. Yes. It's a good idea
D. I don't mind
【单选题】
— What's the matter, dear?___
A. I didn't go to school.
B. I have a terrible headache.
C. I took the kids shopping today.
D. It is a beautiful dress.
【单选题】
Good morning, may I speak to Mark, please?___
A. Who's there?
B. Who's that speaking?
C. Who are you?
D. Who wants to speak to Mark?
【单选题】
Let me introduce myself. I'm Steward.___
A. What a pleasure.
B. Pleased to meet you.
C. I don't know.
D. Thanks a lot.
【单选题】
Let's go to the library this afternoon.___.
A. Yes, that's right.
B. No. I can't.
C. What about you?
D. That's a good idea.
【单选题】
What does Tom's wife do for a living?___.
A. She is a doctor.
B. Tom loves his wife.
C. She has a happy life.
D. She lives far from here.
【单选题】
How tall is your sister?___
A. She is not very well.
B. She is 28 years old.
C. She is very nice.
D. She is as tall as I am.
【单选题】
What do you think of this novel?___
A. I've read it.
B. It's well-written.
C. It was written by my uncle.
D. I bought it yesterday.
【单选题】
How much is this necklace?___
A. It's very nice.
B. It's a birthday present from my parents.
C. It costs fifty pounds.
D. It's a bargain.
【单选题】
How can I get to the cinema?___
A. It's very far.
B. Yes, there is a cinema near here.
C. It's well known.
D. Go down this street and turn left.
【单选题】
What's the matter, John?___
A. I failed my French test
B. It doesn't matter.
C. Nothing's wrong with him.
D. I don't think I can.
【单选题】
What are you majoring in?___
A. In a university.
B. Very hard.
C. Mathematics.
D. At nine in the morning.
【单选题】
Are you going on holiday for a long time?___
A. It was a long time.
B. Two weeks ago.
C. No. Only a couple of days.
D. Not long time ago.
【单选题】
Is Mary there?___
A. Speaking.
B. I'm not Mary.
C. Who are you?
D. Mary is well today.
【单选题】
What day is today?___
A. It's March 6.
B. It's a fine day today.
C. It's March.
D. It's Monday.
【单选题】
Is that seat taken?___
A. Please don't worry.
B. I don't think so.
C. Why not?
D. It's very nice.
【单选题】
Thank you for calling.___
A. Don’t mention it.
B. That's fine.
C. Nice talking to you.
D. Call back again.
【单选题】
How are you getting on today?___
A. Very well.
B. How do you do?
C. I'm a doctor.
D. Nice to have known you.
【单选题】
How's your family?___
A. Thanks all the same.
B. Thanks for calling.
C. Not too bad.
D. Don't mention it.
【单选题】
- How is it that you are late for class again?___
A. Because I missed the bus
B. By bus and then on foot
C. Yes, it is quite wrong
D. It is far from school
【单选题】
- Excuse me. Could you spare me a few minutes? - ___
A. Of course.
B. Of course not.
C. I am sorry to hear that.D.Yes. I'm busy now.
【单选题】
- It's very thoughtful of you to give me a ride. ___
A. It's my pleasure.
B. Take it easy.
C. Sure.
D. Never mind.
【单选题】
- This is heavy! What's in it? ___
A. I think you don't like it.
B. My new computer. I just bought it.
C. I'm glad you're here.
D. Are you really interested in it?
【单选题】
___ I'd like to place an order please.
A. Can I help you?
B. I can help you.
C. What are you doing?
D. Why are you doing?
【单选题】
- Do you know the girl over there?___
A. How can I know?
B. Yes, I remember it now.
C. It's Sam, my teacher's daughter.
D. She is a good girl.
【单选题】
- Shall we go out for dinner tonight?____
A. No, you can't.
B. Yes, please.
C. Thank you, I don't want to.
D. Sorry, I have a report to finish.
【单选题】
- I think the reference book（参考书）is very helpful.____
A. Good idea.
B. So do I.
C. With pleasure.
D. No problem.
【单选题】
- I wish you success in your career.____
A. You are welcome.
B. I think so.
C. Yes, please.
D. The same to you.
【单选题】
- Would you like to come over tonight?____
A. Yes, last night.
B. Yes, over there.
C. Sure, I'd love to.
D. Yeah, I liked it too.
