【判断题】
为保证凝结水泵在高度真空下工作,需用生水密封盘根
A. 对
B. 错
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答案
B
解析
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汽轮机冷态启动时,为了避免金属产生过大的温差,一般不应采用低压微过热蒸汽冲动汽轮机转子的方法
A. 对
B. 错
【判断题】
超高压汽轮机的高、中压缸采用双层缸结构,在夹层中通入蒸汽,以减小每层汽缸的压差和温差
A. 对
B. 错
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阀门是用来通断或调节介质流量的
A. 对
B. 错
【判断题】
汽轮发电机启动过程中在通过临界转速时,机组的振动会急剧增加,所以提升转速的速率越快越好
A. 对
B. 错
【判断题】
对于大型机组而言,自冷态启动进行超速试验,应按制造厂规定进行,一般在带负荷到25%~30%额定负荷、连续运行1~2h后进行
A. 对
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油管道应尽量减少用法兰盘连接,在热体附近的法兰盘必须装金属罩壳,大容量机组的油管道多采用套装式
A. 对
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当转子在第一临界转速以下发生动静摩擦时,机组的振动会急剧增加,所以提升转速的速率越快越好
A. 对
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常用的寿命评估方法为常规肉眼检查、无损探伤和破坏性检验三级管理法
A. 对
B. 错
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低负荷运行时,定压运行的单元机组仍比变压运行的经济性好
A. 对
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单机容量为200MW及以上的新机组的试生产阶段为3个月
A. 对
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数字式电液控制系统是纯电调的控制系统
A. 对
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对汽轮机来说,滑参数启动的特点是安全性好
A. 对
B. 错
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主蒸汽压力、温度随负荷变化而变化的运行方式称滑压运行
A. 对
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汽轮机快速冷却是将压缩空气经空气电加热器加热到所需温度再送入汽轮机各个冷却部位进行冷却的过程
A. 对
B. 错
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协调控制方式既能保证有良好的负荷跟踪性能,又能保证汽轮机运行的稳定性
A. 对
B. 错
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汽轮机总体试运行的目的,是检查、考核调速系统的动态特性及稳定性,检查危急保安器动作的可靠性及本体部分的运转情况
A. 对
B. 错
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调速系统的稳定性、过渡过程的品质、系统动作的迅速性和过程的振荡性是衡量调节系统动态特性的四个指标
A. 对
B. 错
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高压大容量汽轮机热态启动参数的选择原则:根据高压缸调节级汽室温度和中压缸进汽室温度,选择与之相匹配的主蒸汽和再热蒸汽温度
A. 对
B. 错
【判断题】
超速保安器装置手打试验的目的是检查危急保安器动作是否灵活可靠
A. 对
B. 错
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当阀壳上无流向标志时,对于止回阀,介质应由阀瓣上方向下流动
A. 对
B. 错
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运行分析的方法通常采用对比分析法、动态分析法及多元分析法
A. 对
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汽轮机低压缸一般都是支撑在基础台板上,而高、中压缸一般是通过猫爪支撑在轴承座上
A. 对
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运行分析的内容只有岗位分析、定期分析和专题分析三种
A. 对
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蝶阀主要用于主蒸汽系统
A. 对
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管道的吊架有普通吊架和弹簧吊架两种
A. 对
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冷油器的检修质量标准是:油、水侧清洁无垢,铜管无脱锌、机械损伤,水压0.5MPa、5min无泄漏,筒体组装时可用面黏净,会同化学验收合格
A. 对
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【单选题】
在三相交流电路中所谓三相负载对称是指___。
A. 各相阻抗值相等;
B. 各相阻抗值不等;
C. 电阻相等、电抗相等、电抗性质相同;
D. 阻抗角相等。
【单选题】
在交流电流i通过某电阻,在一定时间内产生的热量,与某直流电流I在相同时间内通过该电阻所产生的热量相等,那么就把此直流I定作为交流电流i的___。
A. 有效值;
B. 最大量;
C. 最小值;
D. 瞬时值。
【单选题】
导体的电阻与导体的长度关系为___。
A. 正比;
B. 反比;
C. 随之增加;
D. 无关。
【单选题】
导体的电阻与导体的截面积关系为___。
A. 正比;
B. 反比;
C. 随之减少;
D. 无关。
【单选题】
蓄电池是一种储能设备,他能把电能转变为___能。
A. 热;
B. 化学;
C. 机械;
D. 光。
【单选题】
在计算复杂电路的各种方法中,最基本的方法是___法。
A. 支路电流;
B. 回路电流;
C. 叠加原理;
D. 戴维南原理。
【单选题】
在电阻、电感、电容组成的电路中,不消耗电能的元件是___。
A. 电感、电容;
B. 电阻与电感;
C. 电容与电阻;
D. 电阻。
【单选题】
在电阻、电感、电容和电抗组成的电路中,消耗电能的元件是___。
A. 电阻;
B. 电感;
C. 电抗;
D. 电容。
【单选题】
在电阻串联电路中,每个电阻上的电压大小___。
A. 与电阻大小成正比;
B. 相同;
C. 与电阻大小成反比;
D. 无法确定。
【单选题】
三个相同的电阻串联总电阻是并联时总电阻的___。
A. 6倍;
B. 9倍;
C. 3倍;
D. 1/9倍。
【单选题】
反映电阻元件两端的电压与电流电阻三者关系的定律是___。
A. 基尔霍夫;
B. 焦耳定律;
C. 欧姆定律;
D. 全电路定律。
【单选题】
如果电流的方向由正向负流动,那么电子流的方向是___。
A. 由正向负;
B. 由负向正;
C. 左右摆动;
D. 无法确定。
【单选题】
流入电路中一个节点的电流之和___流出该节点的电流之和。
A. 大于;
B. 小于;
C. 等于;
D. 无关。
【单选题】
1MW的负荷使用10h,消耗电能等于___度。
A. 10;
B. 100;
C. 1000;
D. 10000。
推荐试题
【单选题】
What should a career activist do? ___
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D. A career activist should plan everything in advance.
【单选题】
What should you do in the TempWorld? ___
A. In TempWorld you must withstand disappointment, juggle stressful situations, and handle pressure.
B. You must learn from your setbacks and use them to your advantage in the future.
C. Things always go well for successful people because they are honest.
D. Both A and B.
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Which of the following statements is Not True? ___
A. Your boss may be willing to change his behavior than your think.
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Which of the following public places is NOT mentioned that have banned mobiles? ___
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【单选题】
What happened when the cellphone of the speaker’s friend rang? ___
A. His friend answered the phone and the speaker became invisible to his friend.
B. They answered the phone together.
C. The speaker threw away his friend’s cellphone.
D. His friend hung up the phone and kept talking to the speaker. (C)
【单选题】
What happened to the man? ___
A. He had a car accident.
B. He had his arms broken.
C. He lost his mobile phone.
D. He was not able to use his mobile because he was in a remote area.
【单选题】
Which of the following is NOT true? ___
A. Today there are about 400 million cellphone owners.
B. Today there are about 300 million Personal Computer subscribers.
C. Cellphones will be more often used.
D. Cellphones will completely replace Personal Computers.
【单选题】
Which of the following is true? ___
A. Ellen Johnson-Sirleaf stayed in her country during the nation’s civil war.
B. She is still working for the United Nations.
C. She is the first woman ever elected president of an Asian country.
D. She is a Liberia.
【单选题】
What do you know about the solar eclipse? ___
A. Only hundreds of people gazed at it.
B. It was caused by the earth passing in front of the moon.
C. It was not often seen.
D. It started in Mongolia and ended in Brazil.
【单选题】
What is true about this meeting between the USA and China? ___
A. It was a meeting between Xi Jinping and Donald Trump.
B. It was the first time that the Chinese president had visited the United States.
C. The issue of the Olympics was discussed.
D. South Korea’s nuclear weapons program was discussed.
【单选题】
In which year did the station’s first permanent crew arrived? ___
A. 1998
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【单选题】
If elected, ________________. ___
A. Richardson would be the first Hispanic President.
B. Clinton would be the first African-American President.
C. Romney world be the first Hispanic President.
D. Clinton would be the first Mormon President.
【单选题】
What are the things that the speaker’s inner and outer life based on? ___
A. Money
B. Health
C.
D. elicious food
【单选题】
What kind of things has its own reason for existing? ___
A. Questioning
B. The structure of reality
C. Curiosity
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【单选题】
Who are so full of doubts? ___
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B. Wise people
C. Professors
D. University students
【单选题】
To the speaker, what kind of things always win in life? ___
A. Truth and love
B. Power and status
C. Great minds
D. Money and material
【单选题】
What’s the key word of the speaker? ___
A. Love
B. Power
C. Freedom
D. Curiosity
【单选题】
What happened to the man? ___
A. He committed identity theft.
B. He was put in prison.
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D. He robbed a bank.
【单选题】
What is the attitude of Mrs. Washington? ___
A. She tries to cover up for little George.
B. She thinks Mr. Washington should not ask George directly.
C. She encourages George to chop down the tree.
D. She thinks Mr. Washington should put the blame on the sharp axe.
【单选题】
What do Nancy’s colleagues think about her transgender transition? ___
A. They think it is ridiculous.
B. They make a big fuss about it.
C. They take it lightly.
D. They are sympathetic.
【单选题】
What are the two women talking about? ___
A. They are talking women’s liberation.
B. They are talking about an ideal husband.
C. They want a rewarding job.
D. They are talking about women’s choice between family and career.
【单选题】
According to what you’ve heard, which of the following is NOT true? ___
A. The two ten-minute workouts help people get into shape in a short time.
B. The two ten-minute workouts are designed for the people of certain level of fitness.
C. The two ten-minute workouts help people to lose weight and to be vigorous.
D. The two ten-minute workouts are suitable for most people.
【单选题】
What does Cindy say about visiting Costa Rica in June? ___
A. It is bad because June falls in the rainy season.
B. It is bad because there is almost no sunshine in June.
C. It is not bad because it seldom rains on the coast.
D. It is not bad because it does not rain all the time and in all the places.
【单选题】
What did the professor say about the translation of idioms across language? ___
A. Almost all idioms are translatable and can be universally used.
B. Idioms are hardly translatable and cannot be universally used.
C. Not all idioms are translatable but many have translations in other language.
D. All idioms are translatable and tend to become international.
【单选题】
According to Professor Randal, which of the following is true for SAT II? ___
A. It tests your critical thinking and problem-solving skills.
B. It is more content oriented.
C. It is designed to measure subject-area knowledge.
D. It is designed to measure achievement in
E. nglish, math, reading, and science.
【单选题】
The movie in IMAX format adds the amazing effects except ___________. ___
A. the effect of sound
B. the effect of view
C. the effect of landscape
D. the effect of mystery
【单选题】
What can we learn from the conversation? ___
A. Nobody thinks he is under stress.
B. People should avoid stress completely.
C. Stress is a normal state of affairs.
D. Nobody is subject to stress.
【单选题】
What is Tom’s attitude towards the mobile phone? ___
A. It is very convenient to send text messages.
B. People have to put up with the inconvenience of using mobile phones.
C. He feels important when he uses his mobile phone in public.
D. He cannot live a day without his mobile phone.
【单选题】
Where did Helena start learning Dutch? ___
A. Spain
B. Holland
C. Sri Lanka
D. Indonesia
【单选题】
According to what the broadcaster says about what happened when the blackout occurred, which of the following is not true? ___
A. People crowded the streets of New York.
B. Throngs of people walked across the bridge, screaming and cursing.
C. The blackout stopped subways, buses and turned off traffic lights.
D. Many people are thinking of hitching a ride.
【单选题】
Who is Dr. Burkey? ___
A. The anchor
B. The questioner
C. A student
D. A clinical psychologist.
【单选题】
Which is true about Gandhi’s nonviolence? ___
A. There will be no pains and defeats when people use nonviolence.
B. People should be prepared to die like a soldier when they use nonviolence.
C. Nonviolence means that you have to accept injustice.
D. Soldiers can use violence against violence.
【单选题】
肖东和外祖父是___
A. 直系血亲
B. 直系姻亲
C. 旁系血亲
D. 旁系姻亲
【单选题】
按罗马法的亲等算法,小杨和叔叔的孙子是___
A. 三等亲
B. 四等亲
C. 五等亲
D. 六等亲
【单选题】
甲(男)的外祖母乙是丙(女)的父亲丁的胞姊,因此___
A. 乙是丙的姑母,丁是甲母的舅父
B. 乙是丙的姨母,丙是乙的甥女
C. 乙是丙的舅母,丁是甲母的叔父
D. 乙是丙的婶母,丙是乙的侄女
【单选题】
下列各种亲属关系中,属于直系拟制血亲的有___
A. 外祖父母与外孙子女
B. 养父母与养子女
C. 祖父母与孙子女
D. 继父母与未受其抚养教育的继子女
【单选题】
被告人王某,男,48岁,某村农民。被告人马某,女,45岁,某村农民,系被告人王某之妻。被告人王某与其兄二人按月轮流负担其母(67岁,丧失劳动能力)的生活费。2003月份,被告人王某以收入不足等理由,向其兄提出要求,要其兄独自负担母亲的生活费一年。在向其兄说过此事后,未经其兄、母的同意,被告人王某便拒不负担赡养义务。8月23日早上,其母轮到被告人王某家吃饭,途中与被告人马某相遇,马某便对婆婆进行辱骂,不准其进屋,并将老人推倒在地,8月25日晚上,其母到王某家,见儿子和几个孩子正在吃饭,便哀求儿子给点饭吃。王某未予理睬,老人便自盛了一碗饭,正吃时,马某从外面回来,见状便恶语相加,并冲上去把碗抢下来,随后又将老人打了一顿,赶出门外,8月27日,老人忍无可忍,当众诉冤。之后因生活无着,被迫含愤服毒而死。问:构成虐待罪还是遗弃罪?___
A. 虐待罪
B. 遗弃罪
【单选题】
甲男与乙女通过网聊恋爱,后乙提出分手遭甲威胁,乙无奈遂于甲办理了结婚登记。婚后甲得知,乙婚前就患有医学上不应当结婚的疾病且久治不愈,于是甲向法院起诉撤销该婚姻,下列说法正确的是___
A. 法院应判决撤销该婚姻
B. 该案应判决宣告该婚姻无效
C. 对该案的审理应当进行调解
D. 当时人可以对法院的处理结果依法提出上诉
【单选题】
甲男与乙女系出自同一外祖父母的表兄妹,后来乙女被他人收养。根据我国婚姻法的规定,他们___
A. 可以结婚
B. 如果双方不生育子女可以结婚
C. 不能结婚
D. 以上均不正确
【单选题】
某甲与某乙已登记结婚,但未同居,也未举行婚礼。之后某甲后悔与某乙结婚,进行下列( )行为后,婚姻关系才能解除。___
A. 调解
B. 宣布婚姻无效
C. 离婚
D. 撤销结婚登记