相关试题
【单选题】
关于装置吹扫操作，下列说法正确的是___
A. 调节阀可控制吹扫气源；
B. 吹扫时，调节阀要更换为短节；
C. 调节阀旁路可以不吹扫；
D. 单向阀可以顺着气流吹扫。
【单选题】
关于装置氮气置换的注意事项，下列说法不正确的是___
A. 氮气置换现场排放时要注意防止窒息；
B. 一个取样口氮气置换合格即可；
C. 旁路管线一定要进行置换；
D. 设备低点的导淋要打开。
【单选题】
检修后热区开车前，系统必须干燥合格并氮气保压，其露点必须___℃。
A. -70
B. -60
C. -55
D. -40
【单选题】
E－401出口温度，一般是靠高速___冷剂量来控制的。
A. 丙烯
B. 循环乙烯
C. G-401釜液
D. 乙烯
【单选题】
脱乙烷塔T-440塔顶冷凝器采用___冷剂。
【单选题】
冷箱中的流体甲烷的节流膨胀是（），压力降越大，节流后温度越___。
A. 等焓膨胀，高
B. 等焓膨胀，低
C. 等熵膨胀，高
D. 等熵膨胀，低
【单选题】
再生系统开车前要求氮气置换合格，其氧含量为___。
A. <0.2%
B. <0.5%
C. <1%
D. <2%
【单选题】
装置检修后冷区开车前，系统氮气置换合格后氧含量为___。
A. <0.2％
B. <0.5％
C. <1％
D. <5％
【单选题】
关于系统开车前的准备工作，下列说法错误的是___。
A. 冷箱防潮氮气投用
B. PG\LG根部阀打开
C. 所有调节阀现场处于自动
D. 所有调节阀上下游阀打开
【单选题】
乙烯精馏塔与乙烯制冷压缩机构成了___。
A. 开式B型热泵
B. 开式A型热泵
C. 闭式热泵
D. 半闭式热泵
【单选题】
关于闭式热泵，下列说法正确的是___。
A. 塔内物料与制冷循环介质间是相通的
B. 塔内物料与制冷循环介质间是封闭的
C. 包括精馏塔、再沸器、压缩机、节流阀
D. 包括精馏塔、冷凝器、压缩机、节流阀
【单选题】
复迭制冷的过程中冷剂的使用是___。
A. 串联操作
B. 并联操作
C. 混合操作
D. 没有规定
【单选题】
催化剂装填时，不能从高于___cm以上处往下倾倒。
【单选题】
装填催化剂时，应均匀一致，其目的是___。
A. 防止床层受力不均匀
B. 防止床层被气流吹翻
C. 防止床层受热不均
D. 防止运行时会产生沟流
【单选题】
关于干燥剂的装填，正确的说法是___。
A. 干燥剂的装填应尽量在好天气进行
B. 装填前对罐内的氧含量没有要求
C. 装填时，不需要人监护
D. 下部不需要格栅固定
【单选题】
乙烯装置气密试验时，下列说法正确的是___。
A. 管道焊缝不需做气密
B. 调节阀可以不做气密
C. 闸阀不做气密
D. 各焊缝及联接处均要气密
【单选题】
装置气密试验压力应该___。
A. 小于正常操作压力
B. 等于设计压力
C. 等于正常操作压力
D. 大于设计压力
【单选题】
气密试验首次升压，压力应为试验压力的___，且保压10分钟，检查各连接部位是否正常。
A. 10%
B. 20%
C. 30%
D. 50%
【单选题】
气密性试验时，若发现焊缝泄漏，处理方法正确的是___。
A. 等开工前再处理
B. 立即补焊
C. 补焊完后重做气密
D. 泄压后再补焊
【单选题】
裂解气中氢与一部分甲烷的分离，是在冷箱中用___的办法来达到目的。
A. 顺序分离
B. 逐步深冷
C. 连续深冷
D. 复迭制冷
【单选题】
裂解气深冷分离过程一般不包括___。
A. 干燥
B. 吸收
C. 加氢反应
D. 精馏
【单选题】
裂解气深冷分离过程一般不包括___。
A. 萃取
B. 深冷
C. 加氢反应
D. 精馏
【单选题】
关于反应器飞温的表述正确的是___。
A. 反应器床层温度上升
B. 反应器床层上下温差较大
C. 反应器床层温度较高
D. 反应器床层温度高，温度上升速度很快
【单选题】
乙烯精馏塔T-470建立全回流的目的是___。
A. 稳定乙烯制冷压缩机的运行
B. 缩短开车时间
C. 便于碳二加氢反应器的开车
D. 稳定丙烯制冷压缩机的运行
【单选题】
脱丁烷T-560塔压正常控制指标为()，该塔的（）操作是很危险的，它能在塔内形成浓度很高的()和___容易引起爆炸。
A. 0.35MPa，全回流，丁烯，丁二烯
B. 0.416MPa，全回流，丁烯，甲基乙炔
C. 0.416MPa，全回流，乙基乙炔，丁二烯
D. 0.35MPa，全回流，乙基乙炔，丁二烯
【单选题】
绿油是在炔烃加氢过程中形成的附产物，下列说法不正确的是___。
A. 是炔烃的低聚物
B. 是炔烃的高聚物
C. 是烯烃炔烃的低聚物
D. 是烯烃的低聚物
【单选题】
绿油是在炔烃加氢过程中形成的附产物，下列说法正确的是___。
A. 乙烯加氢可生成绿油
B. 乙炔加氢可生成绿油
C. 乙烷脱氢可生成绿油
D. 乙炔聚合可生成绿油
【单选题】
在碳二、碳三加氢过程中可能导致产生绿油的原因有___。
A. 催化剂选择性高
B. 催化剂活性高
C. 氢炔比大
D. 温度过高
【单选题】
___运用的不是焦耳—汤姆逊效应。
A. 氢气经过冷箱回收冷量
B. 低压甲烷经冷箱回收冷量
C. 氢气开工线的投用
D. 中压甲烷经冷箱回收冷量
【单选题】
裂解气中乙炔的来源是___。
A. 裂解过程中产生的
B. 碱洗塔带来的
C. 冷箱系统带来的
D. 碳二加氢反应器生成的
【单选题】
关于裂解气中水的来源，下列说法错误的是___。
A. 裂解过程中产生
B. 裂解过程中加入稀释蒸汽
C. 急冷过程中用水急冷
D. 碱洗过程中要水洗
【单选题】
关于裂解气中水的来源，下列说法正确的是___。
A. 裂解过程中产生
B. 裂解过程中加入稀释蒸汽
C. 裂解气压缩过程中产生
D. 深冷分离过程中产生
【单选题】
裂解气中CO来自___。
A. 裂解炉炉管内结碳的水煤气反应
B. 急冷系统
C. 碱洗过程中
D. 甲烷化反应
【单选题】
关于冷泵预冷的目的，下列说法不正确的是___。
A. 检查泵润滑是否良好
B. 避免泵启动后发生变形
C. 使泵体各构件收缩均匀
D. 防止泵启动后密封变形而泄漏
【单选题】
关于冷泵预冷的目的，下列说法正确的是___。
A. 检查泵润滑是否良好
B. 检查泵转向是否正确
C. 检查泵是否有机械故障
D. 防止泵启动后密封变形而泄漏
【单选题】
有关冷泵的气相预冷的说法正确的是___。
A. 打开气相线阀，打开LD阀，并不断盘车直至挂霜
B. 打开泵入口阀，打开LD阀，并不断盘车，直至挂霜
C. 打开出口止逆阀旁路，打开LD并不断盘车至挂霜
D. 打开泵入口阀，打开泵出口阀，直至挂霜
【单选题】
冷箱开车初期，氢气开工线的作用是___。
A. 制冷箱压力
B. 补充燃料气
C. 通过节流为冷箱降温
D. 维持燃料气压缩机的最低负荷运转
【单选题】
膨胀机开车时，应___。
A. 开膨胀机再开压缩机
B. 先开压缩机，再开膨胀机
C. 返回线必须全开
D. 按需要调整返回线
【单选题】
脱乙烷塔开车时，塔压是由___控制。
A. 塔顶放火炬阀
B. 冷剂量
C. 冷剂液位
D. 塔顶至反应器的出料量
推荐试题
【单选题】
If a person simply does not care about this activity, it’s ___ impossible to get him to participate.
A. barely
B. seldom
C. hardly
D. practically
【单选题】
Sometimes, even when the mind ___ functioning, the body keeps on working normally.
A. ceases
B. arouses
C. regulates
D. specializes
【单选题】
Jeffery expressed his ___ about the health and fitness of his co-workers, but they said they didn’t want to “waste time” on an exercise bike or jogging.
A. agony
B. concern
C. addiction
D. feedback
【单选题】
Such chemicals are indeed negatively ___ those humans to whom they are expose D.
A. risking
B. detecting
C. impacting
D. overwhelming
【单选题】
We regret for selling you the faulty product, and our company has agreed to ___ you by $500.
A. match
B. reverse
C. reward
D. compensate
【单选题】
This lecture taught me how to manage my time better to include my online studies in my busy ___.
A. schedule
B. outline
C. structure
D. responsibility
【单选题】
Generally speaking, an Irish person will not accept an offer straight away; he will ___ once or twice first before accepting it.
A. receive
B. decline
C. summarize
D. polish
【单选题】
There is every possibility that many species (物种) of animals will die out because of their disappearing food ___.
A. mode
B. source
C. pattern
D. foundation
【单选题】
As a college student, you should enjoy learning and get yourself ___ in those things that interest you.
A. concerned
B. devoted
C. involved
D. pursued
【单选题】
The name of Hitler (希特勒) has always been associated with war and ___ killing in the minds of those people who lived through World War Two.
A. imaginary
B. multiple
C. indispensable
D. massive
【单选题】
He works hard every day to make more money, but he ___ his health, time with his family, and the hobbies he once love D.
A. neglects
B. reminds
C. ceases
D. Declines
【单选题】
I asked a passenger sitting beside me if our train was the Westlake Express train, and he said he ___ of it.
A. not even heard
B. had not even heard
C. even not heard
D. ever had not heard
【单选题】
Whatever you say in the paper has to ___ your own thinking; hence simply repeating the professor’s opinions or whatever is in the readings will not get you very far.
A. ignore
B. arouse
C. reflect
D. release
【单选题】
We are sorry to know that they did not succeed ___ the project for lack of necessary funds.
A. to fulfill
B. to have fulfilled
C. in fulfilling
D. with fulfilling
【单选题】
It is surprising that fewer students were prepared to undertake the ___ to hand in written work on a regular basis, or to study over long periods.
A. engagement
B. commitment
C. authority
D. aspiration
【单选题】
Emily felt hurt and ___ by a close friend who had borrowed a considerable sum of money to pay for a house and then took it as a gift, never thinking of giving back the money.
A. conflicted
B. curbed
C. swollen
D. betrayed
【单选题】
In 1988 the old system was ___ in the country and a new system was introduced to take effect in 1990.
A. transmitted
B. abolished
C. assumed
D. compensated
【单选题】
We should not ___ ourselves to the classroom. We should go out of the classroom, see the world and talk to others as much as we can.
A. entertain
B. confine
C. assign
D. involve
【单选题】
I have always been grateful ___ Fred __the generous and helpful information when I was at the crossroads.
A. to … for
B. to … with
C. for … with
D. for … to
【单选题】
I think we both need to ___ the past, be happy about what we had for a time, learn from our experiences, and move on from there.
A. let go of
B. give authority to
C. make sense of
D. keep up with
【单选题】
My brother and I managed to ___ with each other and we soon made peace after a week’s quarrel.
A. heal
B. reconcile
C. respond
D. advocate
【单选题】
The two robbers in a stolen car tried to ___ a police roadblock (路障), but faile D.
A. break in
B. break off
C. break up
D. break through
【单选题】
Because of his long illness, Lee’s English level had dropped, but he was determined to ___ the other students by working harder.
A. put up with
B. catch up with
C. get along with
D. fill up with
【单选题】
We appreciate your efforts in making changes in your schedule and think that this new arrangement is now ___ to us.
A. agreeable
B. sustainable
C. portable
D. indispensable
【单选题】
The woman who died in a car crash last Saturday in the suburbs has been ___ as Kate Johnson, a 25-year-old office clerk.
A. justified
B. identified
C. notified
D. classified
【单选题】
My nephew failed in the College Entrance Examination, and we were all very sorry that he did not ___ to the university.
A. take it
B. get it
C. make it
D. succeed it
【单选题】
Almost half of that group will experience stress ___ enough to call for professional help.
A. tense
B. moderate
C. bearable
D. intense
【单选题】
If you grow too fast your entire economy could completely shut down and bring growth to a(n) ___.
A. halt
B. cease
C. peak
D. epidemic
【单选题】
I tried my best to drive inside in order to avoid the edges that might make me ___ the steep slope.
A. slip down
B. settle down
C. bring down
D. turn down
【单选题】
When the driver heard that there was a bomb on the bus, he immediately ___ to the side of the highway and radioed the police.
A. put out
B. took off
C. pulled over
D. slipped off
【单选题】
She was very ___ to become a manager in our customers’ office, but finally accepted our offer.
A. eager
B. intelligent
C. ridiculous
D. reluctant
【单选题】
In the race, it looked as if he would be the first, but then another young man who was close behind him put on speed and ___ by a few seconds.
A. beat him for it
B. beat him to it
C. beat him up
D. beat it to him
【单选题】
It is really helpful to have someone like you that we can ___ and count on during difficult times.
A. lean on
B. get to
C. hang on
D. get by
【单选题】
Women have a greater ability to ___ names with faces than men do, and they are also better at recalling lists.
A. associate
B. compare
C. engage
D. involve
【单选题】
He was always ready to help others and managed to ___ his friends ____being hurt.
A. expose … to
B. confine …to
C. restrict … from
D. shield … from
【单选题】
Older people are less likely to be ___ their negative emotions (情绪) and more likely to focus on the positive.
A. reserved for
B. caught up in
C. beat up to
D. counted on
【单选题】
I don’t have any bandage, so I have to ___ pressure to the wound to keep the bleeding down.
A. apply
B. involve
C. fulfill
D. establish
【单选题】
It is important that whichever candidate (候选人) is picked the loser should accept the defeat ___.
A. in advance
B. with great pride
C. with good grace
D. in large part
【单选题】
___ that new homes cost more than older homes, but that is not true across the country anymore.
A. It used to be
B. It is used to be
C. It used to being
D. It is used to being
【单选题】
The boss ___ his employees to work longer hours as the company is dreadfully short of staff at present.
A. called on
B. signed up
C. cared for
D. set up
