相关试题
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汽轮机启动前盘车应连续运行至少4h以上
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当汽轮机高压上缸温度＜150℃启动时，属于冷态启动方式
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当胀差至＋2.0mm,且继续上升,可适当降低真空的方法调整
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排汽温度空负荷时不超过80℃,满负荷时不超过120℃
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当机组负荷至70%Ne时，在阀门管理中进行“单-顺阀”切换
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汽轮机停机后，当润滑油冷油器出口温度低于35℃时，停冷油器水侧
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凝汽式汽轮机除末一二级外，其余各级压力与蒸汽流量成近似正比关系
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汽轮机轴向位移保护定值为+1.2mm，-1.0mm
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汽轮机超速试验后要进行汽轮机调速汽门和主汽门严密性试验
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汽轮机机械超速合格后方可进行电超速试验
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抽汽逆止阀保护试验应在汽轮机正常运行中进行
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汽轮机热井液位至3100mm时，汽轮机跳闸
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汽轮机设备静态试验必须在动态试验合格后方可进行
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汽轮机喷油试验可在汽轮机定速并网前或汽轮机正常运行中进行
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所有汽轮机保护应在机组冲转前投入，低真空保护除外
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汽轮机OPC超速试验合格后方可进行电超速或机械超速试验
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汽轮机调速汽门活动性试验目的是检验调速汽门关闭是否严密
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汽轮机的转动部分包括轴、叶轮、动叶栅、联轴器和盘车装置等
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从干饱和蒸汽加热到一定温度的过热蒸汽所加入的热量叫过热热
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调速系统由感受机构、放大机构、执行机构、反馈机构组成
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企业标准化是围绕实现企业生产目标，使企业的全体成员、各个环节和部门，从纵向到横向的有关生产技术活动达到规范化、程序化和科学化
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具体地说，企业标准化工作就是对企业生产活动中的各种技术标准的制定
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汽轮机负荷增加时，流量增加，各级的焓降均增加
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水蒸气的形成经过五种状态的变化，即未饱和水、饱和水、湿饱和蒸汽、干饱和蒸汽和过热蒸汽
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危急保安器常见的形式有偏心飞环式和偏心飞锤式
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汽轮机常用的联轴器有三种，即刚性联轴器、半挠性联轴器和挠性联轴器
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当流体流动时，在流体层间产生阻力的特性称为流体的黏滞性
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从辐射换热的角度上看，一个物体的吸收率小，则辐射能力强
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目前，火力发电厂防止大气污染的主要措施是安装脱硫装置
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火力发电厂的循环水泵一般采用大流量、高扬程的离心式水泵
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由于受客观条件限制，在运行中暂时无法解决、必须在设备停运时才能解决的设备缺陷，称三类设备缺陷
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工作结束前，如必须改变检修与运行设备的隔离方式，必须重新签发工作票
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工作负责人应对工作许可人正确说明哪些设备有压力、高温和有爆炸危险
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工作票签发人、工作票许可人、工作负责人对工作的安全负有责任
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液体流动时影响能量损失的主要因素是流体的粘滞性
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离心泵的工作点在QH性能曲线的下降段才能保证水泵运行的稳定性
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汽轮机机组参与调峰运行，由于负荷变动和启停频繁，机组要经常承受剧烈的温度和压力变化，缩短了使用寿命
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汽轮机变工况时，级的焓降如果不变，级的反动度也不变
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汽轮机冷态启动冲转的开始阶段，蒸汽在金属表面凝结，但形不成水膜，这种形式的凝结称珠状凝结
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凝汽式汽轮机当蒸汽流量增加时，调节级焓降增加，中间级焓降基本不变，末几级焓降减少
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I want to buy a new tie to ___ this brown suit.
A. go into
B. go after
C. go with
D. go through
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Our company decided to ___ the contract because a number of the conditions in it had not been met.
A. destroy
B. resist
C. assume
D. cancel
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My first ___ was to turn and run.
A. institute
B. institution
C. instinct
D. tuition
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I think it’s time I ___ in a new computer.
A. invested
B. insulted
C. interacted
D. impacted
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The jeweler will ____ the inside of the ring with her name.
A. carve
B. engrave
C. cut
D. engross
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He was bleeding from a _____ on his forehead.
A. lash
B. gash
C. ash
D. sash
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Let us go to the next ______ on the agenda.
A. matter
B. debate
C. speech
D. item
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They are _____ moving their office outside London.
A. considered
B. discussing
C. pondering
D. negotiating
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Although she _____ the old pot thoroughly, she could not make it look completely clean.
A. scrubbed
B. washed
C. made
D. screwed
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The mistake will remain an indelible ____ on his memory.
A. stain
B. thing
C. issue
D. accident
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The wheel ____ through my frozen hand, and the car went right across the road.
A. slipped
B. sipped
C. dashed
D. disappeared
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The cupboard was ____ with old fishing tackle.
A. stuffed
B. stocked
C. stored
D. filled
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The decision depended on the ____ of a coin.
A. loss
B. lot
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D. sign
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Teaching can be a tiring and ____ job.
A. meaningless
B. stressed
C. rewarded
D. stressful
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The building is partly a museum and partly a private ____.
A. place
B. area
C. community
D. residence
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Stop ______ your foot.
A. tossing
B. wiggling
C. exhibiting
D. reviewing
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It was a bloody ___ between the two armies.
A. rebellion
B. encounter
C. meet
D. fight
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They conferred on the best way to ______ business.
A. extend
B. adjust
C. expand
D. adopt
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We had a party last month, and it was a lot of fun, so let’s have ____ one this month.
A. another
B. the other B. more D. other
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I decided to go to the library as soon as I ____.
A. finish what I did
B. finished what I did
C. would finish what I was doing
D. finished what I was doing
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The speaker, ______ for her splendid speeches, was warmly received by the audience.
A. having known
B. being known
C. knowing
D. known
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No sooner had we reached the top of the hill ______ we all sat down to rest.
A. when
B. then
C. than
D. until
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___ energy under the earth must be released in one form or another, for example, an earthquake.
A. Accumulated
B. Gathered
C. Assembled
D. Collected
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Please ___ me for my rudeness. I really do not know the custom here.
A. engaged
B. comfort
C. execute
D. forgive
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Sometimes it is very difficult to ___ some of the English words. Even the native speaker cannot help.
A. decrease
B. create
C. define
D. delight
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In the wife’s eyes, his ___ to their marriage life is far from perfect.
A. requirement
B. commitment
C. participation
D. reflection
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This newspaper often ___ the government’s opinion, not the public opinion.
A. affects
B. reacts
C. reflects
D. recognizes
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It is predicted that heavy rains are ___ to flood the area in a few days.
A. frightening
B. threatening
C. scattering
D. warning
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I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
D. expect
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Long before I ever went there, Africa was alive in my ___.
A. image
B. imaginary
C. imaginative
D. imagination
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The spectacle of the aurora may appear to dazzle and ___ the observer’s eye.
A. enchant
B. charm
C. fascinate
D. draw
【单选题】
The top prize has enhanced the musician’s ___.
A. fame
B. status
C. courage
D. faith
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Compared with Westerners, the ___ use less butter. They prefer the very healthful peanut oil.
A. foreigners
B. Southerners
C. Northerners
D. Orientals
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Within a few days she had become seriously ill, ___ great pain and discomfort.
A. surviving
B. suffering
C. affecting
D. accepting
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People of their generation who lived through World War II have ___ memories of confusion and incompetence.
A. vivid
B. strong
C. acute
D. profound
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Not a breath of fresh air ___ the long white curtains.
A. blew
B. stirred
C. whirled
D. stung
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Figures showed customer complaints had ___ to record levels and profits were falling.
A. added
B. climbed
C. accumulated
D. soared
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Thanks for the advice, but this is something I have to ___ out myself.
A. fulfill
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C. figure
D. claim
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A ___ monument has been erected in Tian An Men Square in honor of the people’s heroes.
A. magnificent
B. gorgeous
C. huge
D. marvelous
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Vietnam made an official ___ that the meeting be postponed.
A. require
B. requirement
C. request
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