相关试题
【判断题】
切粒机液压油系统中有空气会造成切粒机扭矩的波动
【判断题】
在切粒机停车锁紧开关打开时，一定要等锁紧杆液压降至零时才能打开切粒水室
【判断题】
在切粒水室的水未排净之前，绝不可以打开水室
【判断题】
切粒机临时停车，颗粒水切旁通运行后，要尽快将循环水阀关闭，以防止循环过程中颗粒水箱温度过低影响造粒开车
【判断题】
装置正常停工时，应严格按照停工方案进行操作，避免出现操作失误，造成事故的发生
【判断题】
生产高粘度低熔融指数牌号时，因挤压机所需功率大，应将挤压机筒体温度降低
【判断题】
如果需要向导热油罐补加新鲜热油，添加工作必须在导热油系统温度低于100℃时进行，否则会因为产生蒸汽泡儿将导热油排挤出设备
【判断题】
最高工作压力大于等于10MPA小于100MPA的压力容器属于中压容器
【判断题】
流体输送管路的直径可根据流量和流速的大小来设定
【判断题】
经计量后的聚丙烯粉末通过加料料斗进入离合器内
【判断题】
切粒机启动后转速提升过慢不会影响切粒机扭矩
【判断题】
切粒水冷却器冷却水一侧堵会造成切粒水温度过高而产生链状树脂
【判断题】
当发生了颗粒外观污染事故以后，都要彻底确认振动筛各层筛网中是否有残存的污染颗粒，必要时将振动筛停下来清理
【判断题】
如果长期停车，需启动辅机倒空筒体内物料
【判断题】
挤压机筒体温度过高则物料颗粒熔融指数上升
【判断题】
粉尘抽吸系统堵塞会造成粉料计量秤下料波动
【判断题】
当粉末输送管道堵塞时，常需将连接管道的法兰拆开进行清理，因此在操作中遇到的粉尘云浓稠而量大。此时可用流动水膜遮断粉尘云，避免其上升或用氮气将粉尘云驱散
【判断题】
挤压机成型加工段温度过高不会造成粒料粘连。
【判断题】
切粒机进刀油路发生泄漏要立即向液压油缸补油
【判断题】
颗粒料仓系统所有换向阀都装有接近开关以确认阀的转换是否到位，从而防止阀门转换不到位造成管线堵塞
【判断题】
RV901A/B/C/D/E/F现场有启动按钮
【判断题】
粉料挤压造粒的目的是为了使产品的外观好看、便于自动包装
【判断题】
SR803A/B/C为K801A/B/C的保护过滤器
【判断题】
筒体密封的外侧通有氮气，该氮气的压力高于筒体气体压力。所通氮气有两个作用：1、防止筒体内气体溢出2、防止外部氧气进入筒体
【判断题】
助剂加入量大会导致在线MFR分析仪表突然上升
【判断题】
聚丙烯装置挤压机机组中换向阀(或开车阀)只有一个位置，直通位置
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___ No, thanks. I'm just looking around. I'll let you know if I want anything.
A. Could you help me?
B. What will you buy?
C. Can I help you?
D. Do you like to look around?
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- Hello, Peter. What do you do?____
A. I am fine.
B. I am not sick.
C. I am a student from Bonn University.
D. I came from Bonn University.
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A. Be hurry.
B. Come on.
C. Yes, please.
D. Do you mind?
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- Shall we sit up here on the grass or down there near the water?___
A. I'd rather stay here if you don't mind.
B. Sorry, I don't like neither.
C. Certainly, why not？
D. Yes, we like these two places.
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- What do you do on Sunday?___
A. I 'm a teacher.
B. I play football.
C. You are a student.
D. They clean rooms.
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- Our class won the girls' relay race in our school's sports meeting.___
A. That's right.
B. Thanks a lot.
C. Congratulations!
D. It's a pleasure.
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- Hi, is Mary there, please?___
A. Hold on. I'll get her.
B. No, she isn't here.
C. Yes, she lives here.
D. Yes, what do you want?
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- I am afraid I can't return the book to you before Friday. ___
A. Don't be afraid
B. Be careful
C. Not at all
D. Take your time
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A. No problem
B. Think nothing of it
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A. No, you needn't
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-I'm sorry to hear that you failed in the exam______.
A. Not at all
B. Oh, thank you.That's very kind of you
C. You are welcome
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-I will,______.
A. that's all right
B. thank you
C. all right
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-Hello, may I speak to Zhao Hua?_____.
A. My name is Zhao Hua
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C. This is Zhao Hua speaking
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___This is Mr Smith speaking now.
A. Who are you
B. Who is that
C. Who are you calling
D. What do you want to say
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- I was worried about my maths, but Mr. Brown gave me an A.___
A. Don't worry about it.
B. Congratulations! That's a difficult course.
C. Mr. Brown is very good.
D. Good luck to you！
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A. I'd like to
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A. I have no time
B. I'd rather not
C. You can leave
D. I'd be happy to
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- Hi, Jim! Nice to meet you.____.
A. Certainly
B. Many thanks
C. OK
D. Nice to meet you, too
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A. Who are you?
B. Sorry, he isn't in.
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D. Yes, here you are.
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A. No, I won't
B. Yes, with pleasure
C. Yes, please
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A. I'm so glad
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A. her teacher worked hard.
B. Susan worked hard.
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A. It doesn't matter
B. I can't do it
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- How was your journey to Paris? - ____
A. It went very well.
B. I flew there.
C. I love Paris.
D. Thank you for asking.
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A. All right
B. That's right
C. Not at all
D. Never mind
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- Happy birthday to you! ___!
A. Happy birthday to you
B. I'm very glad
C. That's all right
D. Thank you
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- Do you like country music?___.
A. Yes, I like basketball a lot
B. It's far too crowded
C. Yes, I'm crazy about it
D. Oh, it's funny
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- Have a cup of tea, ____? Thanks a lot.
A. don't you
B. haven't you
C. shall we
D. will you
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A. Me too
B. Yes，I'll be free then
C. That's all right
D. The same to you
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— Write to me when you get home. OK, I ______.
A. must
B. should
C. will
D. can
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Tom is so talkative. I’m sure you'll soon get tired ___ him.
A. of
B. with
C. at
D. on
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I don't know ____ to deal with such matter.
A. what
B. how
C. which
D. /
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___ is your girl friend like? She is very kind and good-looking.
A. How
B. What
C. Which
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He ___ driving me home, even though I told him I lived nearby.
A. insisted on
B. insisted at
C. insisted that
D. insisted in
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We came finally ___the conclusion that she has been telling lies all the time.
A. of
B. into
C. to
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I won’t make the___mistake next time.
A. like
B. same
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He ___lives in the house where he was born.
A. already
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D. ever
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I am not used to speaking ___ public.
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I didn’t know what to do, but then an idea suddenly ___to me.
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Measles （麻疹） ___ a long time to get over.
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