相关试题
【判断题】
涡磁刹车在冬季使要将水用时，放净以防止冻结。
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油雾器是一种将润滑油进行雾化并注入空气流中，随压缩空气流入需要润滑的部位，达到润滑的目的。
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油雾器的工作介质可以是没有过滤的压缩空气。
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在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°～90°之间，旋转到0°时，阀门则牌全开状态。
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采用金属密封的蝶阀一般比弹性密封的阀门寿命长，但很难做到完全密封。
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离心泵的结构主要由叶轮.外壳.轴承.密封盘根盒.出水口和进水口组成。
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启动离心泵时要试启动电机，检查运转方向是否正确。
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月保养中要检查离心泵联轴节的固定情况。
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在日保养中要拆下离心泵轴承检查情况并重装。
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离心泵的叶轮腐蚀，磨损会引起泵的排量不足。
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要经常检查除砂泵的吸入口是否有沙子堆积，并及时清理。
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如果除砂器没有底流，则应把顶部阀门适当开小。
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除泥器旋流器排出口，正常的排出是“喷溅”状态。
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气动绞车钢丝绳在使用中任何时候滚筒钢丝绳剩余量不得少于1/3滚筒长度。
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在摩擦表面之间加入润滑剂后，有增强零件强度的作用。
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被系物大致可以分为封闭箱件.敞开式箱件.危险品设备.框架结构件及其它被系物等几种类型。
【判断题】
在没有冷却水的情况下可以频繁的使用主刹车，当偶然忘记通水而引起刹车鼓过热时，可以马上通入冷水，以帮助及时冷却。
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要保持筛布清洁，不准用铁锹乱刮振动筛筛布上的泥砂。
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振动筛的振动弹簧.橡胶块断裂或脱落，皮带和筛布的松紧度不合适时不能启动。
【判断题】
钻井绞车刹车片磨损严重时，可导致刹把压到最低位置刹不住车。
【判断题】
检查油箱油位前，钻井绞车必须停止转动，待飞溅的油流回油箱后再进行检查。
【判断题】
更换钻井绞车刹带片时，发现中间部分刹带片磨损较大，而两端的刹带片磨损较小,那么只要换中间磨损较大的几块就行。
【判断题】
钻井绞车滚筒不转时，涡磁刹车挂上后也在起作用。
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使用事故钻井绞车离合器，应先停车，后挂合，再启动电机。
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现在使用的钻盘最大开口直径是36英寸。
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如需切断转盘马达进行检查.保养时，应挂警示牌，检修转盘。
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润滑油泵不工作或是润滑油路或滤器堵塞会导致变速箱冒烟。
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禁止在坐卡瓦的一面焊接.敲打，保持转盘补心和卡瓦性能良好，可以防止造成钻杆划伤.缩径等伤害，将避免发生钻杆因损伤儿断裂等事故。
【判断题】
安全卡瓦所卡物体外径为114.3-142.9mm时，要用11节的安全卡瓦。
【判断题】
安装井口打榔头时，拉锤击扳手绳子的人员应远离扳手运行方向，避免人员伤害。
【判断题】
螺丝打紧时要采取逐个均匀紧扣，是螺丝.钢圈受力均匀。
推荐试题
【单选题】
3.—He didn’t go to the lecture this morning, did he?
— _____ ．Though he was not feeling very well．
A. No, he didnt B. Yes; he did C. No, he did D. Yes, he didnt
【单选题】
4. If you read a lot, your life ______ full of pleasure.
A. will be B. is C. be D. was
【单选题】
5. The black bag _________ be Annas. She has a blue one.
A. should B. cant C. wouldnt D. could
【单选题】
6. Susan, why are you still here? They are all ready to start.
Im sorry, but I _________ when to start.
A. dont tell B. wasnt told C. didnt tell D. havent told
【单选题】
7.—Why dont you choose the red tie?
—For me, it doesn’t _____ my shirt very well．
A. fix B. accept C. compare D. match
【单选题】
8. — Could you tell me ______? I must find him．
— Sorry．I don’t know．But he was here just now．
A. where Tom was B. where Tom is
C. where has Tom gone D. where can I find Tom
【单选题】
9. —What did Mr Green say to you?
— What a heavy rain! How did you come here? He asked________.
A. at all B. in fact C. in surprise D. as a result
【单选题】
10. I often see Tom on the playground．When I passed the playground yesterday, I saw him ．
A. play; playing B. to play; play C. playing; to play D. playing; play
【单选题】
11. — Mum, could I have ____________ to drink?
— Oh, dear．You can only drink some water．There is _________ in the kitchen．
A. anything; else something B. anything; something else
C. something; else nothing D. something; nothing else
【单选题】
12. We all know that learning a foreign language _______ time and effort.
A. requires B. reduces C. removes D. repeats
【单选题】
13. Her son __________ Coke, but now he __________ milk．
A. is used to drinking; used to drink B. used to drink; uses to drink
C. used to drink; is used to drinking D. is used to drink; is drinking
【单选题】
14. I don’t know the teacher is talking with Miss Wang．
A. what B. whom C. who D. which
【单选题】
15.Millie does __________ that many people are thankful to her．
A. such an important and helpful job B. so important and helpful work
C. a very important and helpful job D. such an important and helpful work
【单选题】
16. I think eating more vegetables is good _______ our health.
—Yes, I agree _______ you.
A. at, to B. for, with C. to, to D. for, to
【单选题】
17. I often go on holiday with my parents _____ summer.
A. in B. at C. on D. of
【单选题】
18. I called you at 4:00 yesterday afternoon, but nobody answered.
Sorry, I ______ with my friends at that time.
A. had swum B. swam C. would swim D. was swimming
【单选题】
19.––Who is on the playground? ---__________．
A. Never B. None C. No one D. A lot
【单选题】
20. The schoolboy ______ a blind man cross the street yesterday.
A. helps B. helped C. will help D. has helped
【单选题】
21. —The 2010 World Expo which will last 184 days will be held in Shanghai on May 1st.
—________exciting news! We shall try our best to support it.
A. How B. How an C. What D. What an
【单选题】
22. They preferred ______ in bed rather than _____ horses．
A. to lie; to ride B. lying; riding C. lying; ride D. to lie; ride
【单选题】
23. —What was Jim wearing at the party?
— Nothing _______. He was in his usual shirt and jeans.
A. special B. simple C. important D. interesting
【单选题】
24. The 2016 Olympic Games ________ in Brazil. Would you like to go there?
Maybe, if possible.
A. are held B. will be held C. were held D. have been held
【单选题】
25. — David, look at the man in white over there．Can you tell me _______ ?
—He is a doctor．
A. who is he B. who he is C．what does he do D. what he does
【单选题】
( ) 26.With help from a Mr. H, you can__________.
A. stop wearing your watch B. get new books and objects
C. finish your homework on time D. know when parents or teachers are near
【单选题】
( ) 27. A PENGO WATCH CONTROL can help you to ______________.
A. repair your TV B. put away your books and objects
C. become a James Bond D. get a daily weather report
【单选题】
( ) 28. You can get your Mr. H for___________.
A. $299 B. $499 C. $199 D. $99
【单选题】
( ) 29. When was canned food invented?
A. In 1870. B. In 1810. C. In 1902. D. In 1926.
【单选题】
( ) 30. After the trip to the Arctic, Clarence Birdseye invented ____________.
A. canned food B. can openers
C. frozen food D. air conditioning
【单选题】
( ) 31. Changes in weather _____________ in Willis Carrier's company.
A. helped to keep food B. made rooms comfortable
C. caused health problems D. hurt printing paper
【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
