【判断题】
压力容器的安全阀是压力容器的安全装置。当压力容器的压力超压时，安全阀就会起跳，将压力泄掉，以保护压力容器。
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相关试题
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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。
【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。
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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。
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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%。
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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。
【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。
【判断题】
热管式换热器特别适用于温差较大的场合。
【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。
【判断题】
正常运行时，复水泵的泵体导淋可以打开排水。
【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。
【判断题】
启动泵时，应该遵循先启动泵，后开出口阀的原则。
【判断题】
常见的弹簧式安全阀可分为有扳手和无扳手两种。
【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。
【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。
【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。
【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。
【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。
【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。
【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。
【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。
【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。
【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。
【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”。
【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。
【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。
【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。
【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。
【判断题】
从加油壶给润滑点加注润滑油时，不需过滤。
【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。
【判断题】
换热器传热效果差的原因只有一个，即换热器结垢。
【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。
【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。
【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。
【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。
【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。
【判断题】
压缩机轴承合金损坏会使压缩机回油温度降低。
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【单选题】
Will you ___ me a favor, please?
A. do
B. make
C. bring
D. give
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It's bad _____ for you to smoke in the public places where smoking is not allowed.
A. behavior
B. action
C. manner
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The computer system ____ suddenly while he was searching for information on the Internet.
A. broke down
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C. broke up
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If she wants to keep slim, she must make a ___ in her diet
A. change
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______ the War of Independence, the United States was an English colony.
A.
B. efore B. At
C. In
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A police officer claimed he had attempted to ____ paying his fare.
A. avoid
B. reject
C. refuse
D. neglect
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While I was in the university, I learned taking photos, ______ is very useful now for me.
A. it
B. which
C. that
D. what
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He is not seriously ill, but only a ____ headache.
A. obvious
B. delicate
C. slight
D. temporary
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On average, a successful lawyer has to talk to several ____ a day.
A. customers
B. supporters
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What is the train ____ to Birmingham?
A. fee
B. tip
C. fare
D. cost
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You shouldn't ______ your time like that, Bob, and was cold yesterdak tonight.
A. cut
B. do
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Both the kids and their parents ____ English, I think. I know it from their accent.
A. is
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You had better ___ a doctor as soon as possible.
A. seeing
B. saw
C. see
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He opened the letter and it contained ___.
A. an important information
B. some important informations
C. many important information
D. some important information
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He has been writing for 3 years, but being a writer is not his ___.
A. chance
B. choice
C. change
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They have never heard any ___.
A. a customer complaint
B. the customer's complaints
C. customer's complaint
D. the customers' complaints
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He is not a child ___.
A. no more
B. no longer
C. any much
D. any more
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The retired man is used to ___ his two dogs early in the morning.
A. exercise
B. exercising
C. exercised
D. exercises
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It was not ___ midnight that they discovered the children were not in their bedroom.
A. before
B. at
C. after
D. until
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Young ___ he is, he knows how to get along with others.
A. like
B. as
C. although
D. however
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Could you show me where the___ shoes are?
A. Women
B. womens
C. woman
D. women's
【单选题】
He succeeded ___ out a lot of things entirely new in the world.
A. in working
B. to work
C. working
D. at working
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It took me a long time to ___ the disappointment of failing the exam.
A. get over
B. get up
C. get into
D. get down
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She ___ 100 pages of the book today.
A. has already read
B. already reads
C. already read
D. was already read
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He has been ___ for nearly three weeks after the death of his dear pet.
A. sad
B. satisfied
C. evil
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One cannot learn a foreign language well ___he studies hard.
A. unless
B. if
C. as
D. when
【单选题】
A large number of people___ present at the meeting, which was out of our expectation.
A. was
B. were
C. have
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When the girls saw the funny man, they couldn't ___ laughing.
A. keep from
B. keep on
C. keep away
D. keep at
【单选题】
We are glad that we finally managed to get into contact ___ them.
A. at
B. on
C. from
D. with
【单选题】
This kind of plant___a lot of water at all times.
A. assumes
B. limits
C. produces
D. requires
【单选题】
Look! Here ___ the famous player.
A. comes
B. come
C. had come
D. coming
【单选题】
Uncle Sam sent him a___ bicycle as a birthday present.
A. red sports new
B. sports new red
C. new sports red
D. new red sports
【单选题】
I couldn't find my English-Chinese dictionary___.
A. anywhere
B. everywhere
C. nowhere
D. somewhere
【单选题】
The plane was about to___, and yet I left my ticket behind.
A. take off
B. take on
C. take up
D. take in
【单选题】
John succeeded ___ what he wanted.
A. to get
B. to getting
C. in getting
D. and getting
【单选题】
The accident was ___ to careless driving.
A. for
B. likely
C. due
D. because
【单选题】
With a good command of reading skills, most students can manage to read ___as they could the year before.
A. as twice fast
B. as fast as twice
C. as twice as fast
D. twice as fast
【单选题】
Some famous singers live on the ___from their record sales.
A. salary
B. price
C. bill
D. income
【单选题】
_____of them thinks that is a good idea.
A. Anyone
B. No one
C. None
D. Someone
【单选题】
Don't be too ___about things you're not supposed to know.
A. strange
B. amusing
C. curious
D. conscious
