【判断题】
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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相关试题
【判断题】
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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汽轮机内叶轮摩擦损失和叶高损失都是由于产生涡流而造成的损失
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汽轮机供油系统的主要任务是保证调速系统用油，供给机组各轴承的润滑和冷却用油，及供给发电机密封用油
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蒸汽的初压力和终压力不变时，提高蒸汽初温能提高朗肯循环热效率
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蒸汽初压和初温不变时，提高排汽压力可提高朗肯循环的热效率
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降低排汽压力可以使汽轮机相对内效率提高
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蒸汽与金属间的传热量越大，金属部件内部引起的温差就越小
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汽轮机金属部件承受的应力是工作应力和热应力的叠加
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汽轮机的寿命包括出现宏观裂纹后的残余寿命
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汽轮机在稳定工况下运行时，汽缸和转子的热应力趋近于零
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Being a pop star can be quite a hard life, with a lot of traveling ________ heavy schedules.
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Tony is very disappointed _______ the results of the exam.
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Those gifts of rare books that were given to us were deeply _________.___
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In a sudden _____________ of anger, the man tore up everything within reach.___
A. attack
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In Britain people _____________ four million tons of potatoes every year.___
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I'd _____________ his reputation with other farmers and business people in the community, and then make a decision about whether or not to approve a loan.___
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She cooked the meat for a long time so as to make it _____________ enough to eat.___
A. mild
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The computer revolution may well change society as _____________ as did the Industrial Revolution.___
A. certainly
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A lot of ants are always invading my kitchen. They are a thorough ___________.___
A. nuisance
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As we can no longer wait for the delivery of our order, we have to _________ it.___
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When a fire _________ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.___
A. broke of
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The destruction of these treasures was a loss for mankind that no amount of money could __________.___
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The student was just about to ___________ the questions, when suddenly he found the answer.___
A. arrive at
B. submit to
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When there are small children around, it is necessary to put bottles of pills out of _________.___
A. reach
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The _________ of blood always makes him feel sick.___
A. sight
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In Britain, the best season of the year is probably __________ spring.___
A. later
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Free medical treatment in this country covers sickness of mind as well as _________ sickness.___
A. normal
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Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _________ to his confusion.___
A. extended
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A completely new situation will ___________ when the examination system comes into existence.___
A. arise
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Cancer is second only __________ heart disease as a cause of death.___
A. of
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C. with
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The manager needs an assistant that he can _________ to take care of problems in his absence.___
A. count on
B. count in
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We gave out a cheer when the red roof of the cottage came __________ view.___
A. from
B. in
C. before
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【单选题】
They took ________ measures to prevent poisonous gases from escaping.___
A. fruitful
B. beneficial
C. valid
D. effective
【单选题】
Doing your homework is a sure way to improve your test scores, and this is especially true _______ it comes to classroom tests.___
A. when
B. since
C. before
D. after
【单选题】
In developing countries people are _______ into overcrowded cities in great numbers.___
A. breaking
B. filling
C. pouring
D. hurrying
【单选题】
There are other problems which I don't propose to ____________ at the moment.___
A. go into
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C. go for
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It is quite necessary for a qualified teacher to have good manners and _________ knowledge.___
A. extensive
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C. intensive
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I'm not sure whether I can gain any profit from the investment, so I can't make a(n) ______ promise to help you.___
A. exact
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The sports meet, originally due to be held last Friday, was finally ________ because of the bad weather.___
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It has been revealed that some government leaders _______ their authority and position to get illegal profits for themselves.___
A. employ
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Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ________.___
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The store had to _______ a number of clerks because sales were down.___
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All the students in this class passed the English exam ________ the exception of Li Ming.___
A. on
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Writing is a slow process, requiring _______ thought, time, and effort.___
A. significant
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C. enormous
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