相关试题
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67.事故发生时,应按___的原则进行处理。
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68.事故发生时,根据仪表显示及设备的异常现象判断事故发生的___。
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69.事故发生时,迅速处理事故,首先解除对___的威胁,防止事故扩大。
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70.事故发生时,必要时应立即解列或停用发生事故的设备,确保___。
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71.故障发生时,所有值班员应在___统一指挥下及时正确地处理故障。
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72.故障发生时,___应及时将故障情况通知非故障机组,使全厂各岗位做好事故预想,并判明故障性质和设备情况以决定机组是否可以再启动恢复运行。
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73.机组运行中发生故障时,___应保持冷静,根据仪表指示和报警信息,正确地判断事故原因,果断迅速采取措施,首先解除对人身、电网及设备的威胁,防止事故扩大蔓延,限制事故范围,必要时立即解列或停运发生故障的设备,确保非故障设备正常运行,消除故障根本原因,迅速恢复机组正常运行。
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74.当运行人员到就地检查设备或寻找故障点时,未与检查人取得联系之前,不允许对被检查设备___。
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75. 当运行人员到就地检查设备或寻找故障点时,如果发生的事故危及人身、设备安全时,必须按照规程的有关规定,迅速消除对人身和设备的危害。当确认设备不具备继续运行的条件或继续运行对人身、设备有直接危害时,应___。
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76.故障处理中,运行人员应力争设法保证厂用电的安全运行,尤其应保证事故保安段电源的可靠性,以确保___设备的正常可靠运行。
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77.在故障处理过程中,接到命令后应进行___,如果不清,应及时问清楚,操作应正确、迅速。操作完成后,应迅速向发令者汇报。
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78.事故运行情况下,运行人员必须坚守岗位,如故障发生在交接班时间内,不得进行交接班,交班的运行人员应继续工作,接班人员应该协助交班人员进行事故处理,但不得___。当机组恢复正常运行状态或事故处理至机组运行稳定状态后,根据值长命令方可进行运行交接班。
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79.事故处理完毕后,值长必须收集事故过程中的___,保存资料以备事后分析。80.事故处理后,运行人员必须实事求是地将事故发生的时间、现象及处理过程中所采取的措施详细地___。事后必须按照“四不放过”的原则对所发生的事故原因及处理过程进行认真分析总结,并写在异常分析记录薄内。
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81.事故处理完毕,应将所观察到的现象、汇报的内容、接受的命令及发令人、事故发展的过程和对应时间及采取的处理措施等进行___,并将事故发生及处理过程中的有关数据记录收集备齐,以备故障分析。
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发电机定子电压最高不得大于额定电压的___,最低电压一般不应低于额定电压的___,并应满足___电压的要求。
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我公司发电机型号___,冷却方式___,励磁方式___。
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发电机正常运行频率应保持在___Hz,允许变化范围为___Hz,可以按额定容量连续运行。频率变化时,定子电流、励磁电流及各部分温度不得超过___。
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我公司发电机定子额定电压___,定子额定电流___。
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我公司额定励磁电压___,额定励磁电流___。
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发电机定子电压允许在额定值范围___内变动,当功率因数为额定值时,其额定容量不变,即定子电压在该范围内变动时,定子电流可按比例相反变动。但当发电机电压低于额定值的___时,定子电流长期允许的数值不得超过额定值___。
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发电机运行的氢气纯度不得低于___,含氧量小于___。
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发电机转子额定电压___,转子额定电流___。
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发电机并列后有功负荷增加速度决定于___,无功负荷增加速度___,但是应监视定子电压变化。
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发电机转子绕组绝缘电阻用___摇表测量,绝缘值不得小于___。
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定子三相电流不平衡时,就一定会产生___电流。
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发电机在升压过程中检查定子三相电压应___上升,转子电流不应超过___。
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发电机转子空载电压___,转子空载电流___。
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发电机正常运行时,定子电流三相不平衡值一般不能超过定子额定值的___。
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水内冷发电机定子线棒层间最高和最低温度间的温度差达___℃或定子线棒引水管出水温差达8℃时应报警并查明原因,此时可降负荷处理。水内冷发电机定子线棒温差达14℃或定子引水管出水温差达___℃,或任一定子槽内层间测温元件温度超过___℃或出水温度超过___℃时,在确认测温元件无误后,为避免发生重大事故,应立即停机,进行___及有关检查处理。
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在汽轮发电机中,由于定子磁场的不平衡或大轴本身带磁,当出现交变磁通时,在轴上感应出一定的电压,称为___。轴电压由轴颈、油膜、轴承、机座及基础底层构成通路,当油膜被破坏时,就在此回路内产生一个很大的电流,称为___。
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发电机突然甩负荷后,会使端电压___,使铁芯中的磁通密度增加,导致铁芯损耗增加、温度___。
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系统短路时,瞬间发电机内将流过数值为额定电流数倍的___电流,对发电机本身将产生有害的、巨大的___力,并产生高温。
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当系统发生不对称短路时,发电机绕组中将有___电流出现,在转子上产生___频率的电流,有可能使转子局部___或造成损坏。
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为了防止结露和可能的振动增加,发电机冷氢温度正常应保持在___,但冷氢温度最低不得低于___。
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正常运行时发电机定子线圈温度不大于___,定子线圈出水温度不大于___。
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发电机进相运行期间,6kV厂用母线电压不能低于___,否则停止继续降低无功负荷。
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发电机运行期间周波的变化范围为___,能保证发电机在额定出力下运行。
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电网发生事故时发电机最低频率不得低于___。
推荐试题
【单选题】
( ) 32. According to the passage, which of the following may lead to inventions?
A. People's needs. B. Public support.
C. Modern technology. D. Practical suggestions.
【单选题】
( ) 33. 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】
( ) 34. 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】
( ) 35. 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】
( ) 36. 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】
( ) 37. The Chinese Yellow Sea Wetlands are in the _______ of China.
A.south B.east C.west D.north
【单选题】
( ) 38. Usually the weather in the wetlands is _______.
A.hot B.pleasant C.cold D.dry
【单选题】
( ) 39. The World Wetlands Day is on _______.
A.February 2 B.June 25 C.April 22 D.March
【单选题】
( ) 40. We must protect wetlands because _______.
A.they are home for wildlife B.they can prevent flood
C.they can offer food to the animals and birds D.all of the above
【单选题】
) 1. —Is it far from here to the bank?
—Not very, only________.
A. 20 minute’s walk B. 20 minutes walk
C. 20 minutes’ walk D. 20 minutes’ walks
【单选题】
2. — After discussing, the students ________ some good ideas to work on the project.
— Thats great!
A. put up B. set up C. caught up with D. came up with
【单选题】
3. Yesterday Tommy walked past my table and ______ my bowls and dishes.
He should be careful next time.
A. knocked off B. took off C. showed off D. turned off
【单选题】
4.We don’t have enough nurses to look after patients.At least ___ nurses are needed.
A. ten another B. more ten C. another ten D. other ten
【单选题】
5. — Zhao Rui, it’s said that many famous singers will come to Yangzhou on April 18th. How about watching the evening show there?
—________! Let’s ask Huang Tao to go with us.
A. Best wishes B. Sounds great C. Good luck D. That’s OK
【单选题】
6.—Hello! This is Henry Speaking.I’d like to speak to your father.
—Sorry, he has Shanghai.
A. been in B. been to C. come to D. gone to
【单选题】
7. — It’s difficult for the village children to cross the river for school.
— I think a bridge ______ over the river.
A. was built B. is being built C. has been built D. should be built
【单选题】
8. —Where would you like to go, Jinan or Qufu?
— .I only want to go to Qingdao.
A. Each B. Either C. Neither D. All
【单选题】
9 — The documentary A Bite Of China II is quite popular around China recently. How do you like it? ______.
A. I think so B. Pretty good C. Its my pleasure D. All right
【单选题】
10. There are three English-books on the shelf, but ______ of them is mine.
A. both B. neither C.all D. none
【单选题】
11. When the parents arrived at the hall, the students _______ their projects.
A. have finish B. finished C. had finished D. are finishing
【单选题】
12. This week, the _______ seems to change every day: one day is hot; the next day is cold.
A. time B. weather C. season D. way
【单选题】
13. He never does his work _______ Mary.
A. as careful as B. so careful as C. carefully as D. as carefully
【单选题】
14. — Can he jump high?
— Yes, he ______. He is a good high jumper.
A. must B. need C. can D. shall
【单选题】
15. The shop _____ at 8:00 a.m.and it ________ for ten hours every day.
A. is open; has opened B. is opened; opens
C. opens; is open D. opened; opens
【单选题】
16. —Excuse me, may I use your bicycle? ______ is broken.
Certainly. But remember to return it before lunch.
A. Mine B. Me C. Myself D. I
【单选题】
17. Simon, what do I need to take for the hiking?
Youd better ________ more water than usual. Its hot today.
A. to take B. taking C. take D. took
【单选题】
18. Helen ______ to a language school when she was seven.
A. sent B. is sent C. will send D. was sent
【单选题】
19. — Is this park youve visited recently?
— Yes, it's the most beautiful one Ive ever visited before.
A. that B. the one C. which D. the one which
【单选题】
20. — Its difficult for the village children to cross the river for school.
— I think a bridge ________ over the river.
A. should be built B. is being built C. has been built D. was built
【单选题】
21. — Could you tell me when Mr. Li ________ in Huaibei?
— Sure..When he ________, I’ll call you.
A. arrives; will arrive B. will arrive; will arrive
C. arrives; arrives D. will arrive; arrives
【单选题】
22.There is ________ 800-metre-long road behind ________ hospital.
A. an; an B. an; the C. a; a D. a; the
【单选题】
23. — Did you see a girl in yellow pass by just now?
— No, sir. I ________ a magazine.
A. read B. am reading C. was reading D. would read
【单选题】
24.In fact, my parents are not only kind to me, but also strict ________ me.
A. at B. to C. for D. with
【单选题】
25. The boy_____ a yellow sweater can_____ himself now.
A. wearing; dress B. putting on; wear C. put on; dress D. dressing;
【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
【单选题】
( ) 29. When a baseball player hits the ball, he must ______ to get a point.
A. run to each base freely
B. touch the home plate first
C. touch all the bases with his hands
D. run to each base in order and touch it with his foot
【单选题】
( ) 30. When was the importance of touching all the bases shown?
A. Before the baseball rules made.
B. At the end of the 1974 baseball seasons.
C. At the start of the 1974 baseball seasons.
D. In the second week of 1974.
【单选题】
( ) 31. Who hit home run number 715?
A. Babe Ruth. B. Hank Aaron. C. Babe Ruth’s partner. D. Hank Aaron’s friend.