【判断题】
红外测速仪的优点就是无须在转动部位贴上标签就能够对正在运转的设备进行测速。
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】
正常操作中,调节阀坏了,应用副线阀控制维持生产,关闭保护阀,让仪表工修阀。
A. 对
B. 错
【判断题】
我装置仪表风调节阀的动力来源是由空分装置提供的,CW是由四循提供。
A. 对
B. 错
【判断题】
一台气动薄膜调节阀,若行程的50%则流过阀的流量也应为50%。
A. 对
B. 错
【判断题】
固定管板式换热器的使用条件是两流体的温差较大、腐蚀性较大的物料。
A. 对
B. 错
【判断题】
在其他条件一定时,换热器传热面积越大,传递的热量也越多。
A. 对
B. 错
【判断题】
换热器停用时,要先停热流,后停冷流。
A. 对
B. 错
【判断题】
热管式换热器特别适用于温差较大的场合。
A. 对
B. 错
【判断题】
润滑油系统储压器投用时,先将其皮囊充氮气,再将皮囊外侧充油并排气,全开其出口阀。
A. 对
B. 错
【判断题】
正常运行时,复水泵的泵体导淋可以打开排水。
A. 对
B. 错
【判断题】
离心泵机械密封泄漏应立即切换泵,物料进出口阀关闭并倒空置换以便检修。
A. 对
B. 错
【判断题】
启动泵时,应该遵循先启动泵,后开出口阀的原则。
A. 对
B. 错
【判断题】
备用泵盘车的方向一般为泵的运转方向。
A. 对
B. 错
【判断题】
常见的弹簧式安全阀可分为有扳手和无扳手两种。
A. 对
B. 错
【判断题】
当工作介质有毒、腐蚀、粘性大时,应装爆破片代替安全阀,或采用爆破片与安全阀共用的重叠式结构。
A. 对
B. 错
【判断题】
一般条件下,换热器的热负荷必须大于或等于传热速率。
A. 对
B. 错
【判断题】
热负荷是生产上要求换热器在单位时间里所具有的换热能力。
A. 对
B. 错
【判断题】
离心泵的主要机件材质选用、磨损极限符合规程的规定,表明其内部机件质量符合要求。
A. 对
B. 错
【判断题】
一台操作压力为1.2MPa的管壳式换热器,其技术资料中应具有压力容器使用许可证。
A. 对
B. 错
【判断题】
检查离心泵地脚螺栓的错位情况属于离心泵的小修项目。
A. 对
B. 错
【判断题】
检查、清洗泵入口和油系统过滤器属于电动往复泵的小修项目。
A. 对
B. 错
【判断题】
在检查往复式计量泵密封填料泄漏情况时,其泄漏量应不大于10滴/min,各连接处密封面不应有渗漏现象。
A. 对
B. 错
【判断题】
设备维护保养制度规定,操作人员必须严格按操作法正确使用设备和精心维护设备,确保设备“安、稳、长、满、优、经济”运行。
A. 对
B. 错
【判断题】
设备维护与保养的目的就是贯彻“以维修为主,维护为辅”的方针,要求正确使用,精心维护,使设备始终保持良好运行或待用状态。
A. 对
B. 错
【判断题】
设备维护保养制度规定,操作人员必须认真执行《设备润滑管理制度》,坚持“三定”、“五级过滤”。
A. 对
B. 错
【判断题】
在机器设备中,凡接触表面有相对运动的部件都会发生摩擦,润滑是降低摩擦、减小磨损、降低能耗的一种有效措施。
A. 对
B. 错
【判断题】
在选用润滑油时,一般是部件的运动速度越大,选用的润滑油的粘度越大。
A. 对
B. 错
【判断题】
具有独立润滑油系统的大型机组检修后,润滑油循环一定时间后,方可试车或投入运行。
A. 对
B. 错
【判断题】
润滑油的闪点反映润滑油对温度的安定性,高温环境应选择闪点高的润滑油。
A. 对
B. 错
【判断题】
从加油壶给润滑点加注润滑油时,不需过滤。
A. 对
B. 错
【判断题】
填充润滑脂时,在极低速时可以填满。
A. 对
B. 错
【判断题】
螺杆式压缩机的完好标准要求具有设备结构简图及易损配件图。
A. 对
B. 错
【判断题】
换热器传热效果差的原因只有一个,即换热器结垢。
A. 对
B. 错
【判断题】
塔类设备在检修时,人孔拆卸必须自下而上逐只打开。
A. 对
B. 错
【判断题】
关键机组是指关键设备中的传动设备,而关键设备是直接影响产品质量、产量,正常生产时不能停机的大型设备。
A. 对
B. 错
【判断题】
设备润滑的“五定”是设备润滑管理的重要内容和科学方法,其中的“定时”是指按指定时间加油。
A. 对
B. 错
【判断题】
计量泵不上量的主要原因是泵内有气体。
A. 对
B. 错
【判断题】
蒸汽轮机通流部分结垢一般第一、二级结垢较多,以后各级逐渐减少。
A. 对
B. 错
【判断题】
如果裂解气压缩机自身原因停车,要立即停乙烯机和丙烯机。
A. 对
B. 错
【判断题】
压缩机轴承合金损坏会使压缩机回油温度降低。
A. 对
B. 错
【判断题】
透平大气安全阀泄漏,对真空度影响不大。
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