相关试题
【单选题】
机组冲动前凝汽器建立真空不小于___kPa
【单选题】
低压汽封内的蒸汽温度维持在___，以防汽封体可能的变形和损坏汽轮机转子
【单选题】
机组正常运行时润滑油温在43～49℃，各轴承的回油温度＜___℃，回油量正常。
【单选题】
机组正常运行时主油箱油位应保持在+___~-180mm。
【单选题】
1号机主油箱油位高二值为___。
A. ＋319mm
B. ＋600mm
C. ＋500mm
【单选题】
1号机主油箱油位高一值为___。
A. ＋100mm
B. ＋37 mm
C. ＋56 mm
【单选题】
1号机主油箱油位低一值为___。
A. －180mm
B. －300mm
C. －250mm
【单选题】
1号机主油箱油位低二值为___
A. －400mm
B. －450mm
C. －260mm
【单选题】
当油箱油温低于___℃，禁止启动盘车。
【单选题】
主油箱负压保持在___pa，
A. -400～-500
B. -50～-100
C. -50～-200
【单选题】
顶轴油泵入口压力高于___MPa时, 顶轴油泵启动允许。
【单选题】
启机时,当机组转速＞___r/min时,停顶轴油泵。
【单选题】
停机时,当机组转速＜___r/min时,起顶轴油泵。
【单选题】
确认轴封供汽停止、高压缸调节级金属温度低于___℃，且高、中压缸上下缸金属温差均小于42℃时，方可停止盘车装置的运行。
【单选题】
确认主机盘车装置、顶轴油泵及密封油系统均已停止运行。高中压缸最高金属温度低于___℃，并且各轴承金属温度均在正常范围内，方可停止交流润滑油泵。
【单选题】
机组正常运行时，EH油箱油位应保持在___mm。
A. 500-650
B. 400-500
C. 370-450
【单选题】
给水泵小汽轮机MEH控制系统的控制方式中，锅炉自动方式能通过把从锅炉协调控制系统CCS来的给水流量信号，转换成转速定值信号，输入转速控制回路控制小汽轮机的转速。转速控制范围是___r/min。
A. 0-6000r
B. 2500-6000
C. 3000-6000
【单选题】
机组启动时，上缸调节级处金属温度在___℃之间称为温态启动。
A. 150～200；
B. 150～200；
C. 120～415；
D. 250～300
【单选题】
汽轮机冷态启动时，一般控制升速率为___r/min。
A. 200～250；
B. 300～350；
C. 100～150；
D. 400～500。
【单选题】
机组正常运行时，EH油母管压力___±0.5 MPa。
【单选题】
机组正常运行时EH油箱温度___℃。
A. 35～45
B. 45～55
C. 40～50
【单选题】
EH油泵启动前油箱油位应不低于___mm。
【单选题】
禁启EH油泵在油温低于___℃情况下运行。
【单选题】
油温低于___℃时，应检查投入EH加热泵。
【单选题】
机组运行时，发电机氢压应保持额定氢气压力即___MPa(表压).
【单选题】
正常运行时，发电机氢气湿度(露点)应保持在___℃。
A. －5℃～－25
B. －10℃～－25
C. －5℃～－20
【单选题】
发电机内充满氢气时，必须有密封油密封，空侧油压应确保大于氢压___MPa.
A. 0.036
B. 0.084
C. 0.092
【单选题】
机组正常运行时发电机漏氢量＜___m3/日。
【单选题】
当发电机满足额定氢压0.35Mpa的条件下，氢气冷却器有1/4组退出时，允许带___额定负荷。
【单选题】
发电机氢压小于___MPa时，应注意氢侧密封油回油箱及消泡箱油位，防止密封油进入发电机内。
【单选题】
机组正常运行时，保持氢油压差在___MPa范围之内。
A. 0.05～0.08
B. 0.08～0.084
C. 0.06～0.07
【单选题】
机组正常运行时，空侧、氢侧密封油供油压差在___Kpa范围之内。
A. 0--0.49
B. 0.1--0.3
C. 0.2--0.49
【单选题】
机组正常运行时，密封油冷却器出口油温应保持在___℃之间。
A. 40～49
B. 35～40
C. 40～55
【单选题】
机组正常运行时，空侧密封油回油温度≤___℃。
【单选题】
机组正常运行时，氢侧密封油回油温度≤___℃。
【单选题】
密封油系统中的刮片式滤油器每___小时应转动一次手柄，清理污垢。
推荐试题
【单选题】
Q2: What can we learn about Christopher?___
A. He made a film about his trip to Alaska .
B. He wrote a story about his trip to Alaska .
C. He died while having an adventure in Alaska .
D. He learned how powerful and risky Alaska was .
【单选题】
Q3: What does the woman think about Christopher taking the trip to Alaska?___
A. He was too foolish .
B. He was really romantic .
C. He had a very kind heart .
D. He had a spirit for trying things .
【单选题】
Q4: Which of the following is NOT mentioned as something that would have saved Christopher’s life?___
A. A gun to hunt .
B. The map of the area .
C. Emergency food supplies .
D.
E. mergency communication equipment .
【单选题】
Q1: What speed can an avalanche reach within five seconds of taking off?___
A. At 8 miles an hour .
B. At 18 miles an hour .
C. At 80 miles an hour .
D. At 88 miles an hour .
【单选题】
Q2: According to the passage, under what circumstances may an avalanche occur?___
A. There are too many layers of snow on the .
B. There is a layer of snow covering an entire area .
C. The top layer of snow slides off the layer below it .
D. The layer of snow below the surface becomes unstable .
【单选题】
Q3: What are skiers advised to do to avoid being caught in an avalanche?___
A. Ski only in the official ski areas .
B. Look for solid snow to walk on .
C. Look out for each other while skiing .
D. Learn to control themselves in an avalanche .
【单选题】
Q4: Why does the ski patrol use explosives?___
A. To dig holes in the snow .
B. To close the area for skiing .
C. To make an avalanche move on purpose .
D. To' check how different layers are holding up .
【单选题】
Q1:What is conversation mainly about?___
A. The woman's happy college life the man's doubt .
B. The woman's spending habits and the man's concerns .
C. The man's reminding the woman of the exam this Thursday .
D. The man's support for the woman over the past 15 years .
【单选题】
Q2:What did the woman do last night?___
A. She bought a new leather coat .
B. She studied very hard for an exam .
C. She treated all her friends to dinner .
D. She went to a concert with her friends .
【单选题】
Q3:Where did the woman get the money?___
A. She just received her student loan .
B. She saved some money for herself .
C. She borrowed the money from her friends .
D. She asked her mom to send her the money .
【单选题】
Q4:What is the man?___
A. A teacher of biology .
B. An undergraduate student .
C. A freshman in biology class .
D. A graduate teaching assistant .
【单选题】
Q1: What is this passage mainly about?___
A. How businesses can compete with each other .
B. How small businesses operate during holidays .
C. How small businesses manage holiday workers .
D. How can earn more money during holidays .
【单选题】
Q2: According to Rubin, what can small companies do to thank holiday workers?___
A. Have talks with their families .
B. Give them good extra benefits .
C. Offer them expensive holiday tokens .
D. Show appreciation to them face to face .
【单选题】
Q3: What can small business owners do to help holiday workers get into the holiday spirit?___
A. Entertain them with big meals .
B. Let them enjoy some holiday games .
C. Give them handmade thank-you cards .
D. Send their families some holiday gift cards .
【单选题】
Q4: Who are supposed to benefit most from this passage?___
A. Workers who have to work during holidays .
B. Employees who intend to earn extra money .
C. Big companies that usually close on holidays .
D. Small businesses that try to be more competitive .
【单选题】
In the first two paragraphs of the passage the writer tries to tell us that___
A. he had lived in Washington D.C. for twenty years
B. he was very imaginative when he was a child
C. he had fond memories of his old neighborhood
D. )he had come from a very poor neighborhood
【单选题】
The writer ,as a child ,was very fond of playing in the basement because ___
A. it was bright and alive
B. it contained a movie house and a space station
C. it was ideal for playing hide-and-seek
D. it was surrounded by trees and flowers
【单选题】
How did the writer feel when he visited his old neighborhood in Washington D.C. ?___
A. Greatly surprised .
B. Very regretful .
C. Quite excited .
D. Very sad .
【单选题】
On his visit to his hometown ,the writer found the old apartment building___
A. see medunfit to live in
B. had been repaired
C. could hardly be recognized
D. looked dirty and smelt horrible
【单选题】
" Youcan never go home again "inthe last sentence of this passage means that___
A. one should never revisit his hometown after many years of absence
B. one will never find his hometown the same as it was in his childhood memory
C. avisit to one's hometown will bring back one's fond memories of home
D. avisit to one's hometown will bring back many sad memorie
【单选题】
We learn from the passage that Tracy died___
A. on December 8,1992
B. of brain damage
C. 24 hours after he fell off the roof of a car
D. in a car crash
【单选题】
Tracy's parents decided to donate Tracy's organs because___
A. Tracy told them to do so just before he died
B. they wanted to save others the pain of seeing a dear one die
C. David's life could continue in a meaningful way
D. they knew David was suffering from a hopeless liver disease
【单选题】
The meeting between the writer's family and Tracy's parents was arranged because___
A. the writer and her husband wished to express their thanks to Tracy's parents
B. the local organ bank wanted to see how both families felt about the donation
C. Tracy's parents wanted to see someone whose life had been saved by the donation
D. the two families were linked by the most bittersweet ties imaginable
【单选题】
The writer and her husband learned how Tracy died___
A. from his parents
B. from the organ bank
C. from the hospital
D. from the doctor who performed the operation
【单选题】
The meeting between the two families helped to ease the Marshes'suffering because___
A. they saw that David looked very much like their son
B. they saw that David had regained health with Tracy's liver
C. they now had someone to share their memories of Tracy
D. they now knew for sure they had done the right thing
【单选题】
The writer's first marriage was unsuccessful because___
A. her husband often woke her up at midnight
B. her husband kept criticizing her
C. she was so unattractive
D. she had a self-esteem problem
【单选题】
When the writer asked for a divorce ,her husband___
A. told her that she would never find one who loved her as he did
B. delayed two years before giving her a reply
C. accused her of having an affair
D. said that she was unattractive and not worth loving
【单选题】
When the writer first met Clint ,she felt that___
A. she should have listened to her friend and met Clint earlier
B. Clint was a nice ,dazzling young man
C. Clint could not be really interested in her
D. she would find true love in Clint
【单选题】
The writer was particularly touched by Clint because___
A. he loved her children and asked for their approval of the marriage
B. he said that he could not imagine a life without her and the children
C. he believed that at 2 and 4 ,the two children were the "menof the house "
D. hekept her company and talked with her until the next morning
【单选题】
The writer's marriage to Clint is important to her mainly because___
A. it gave her and her sons a second chance to live a happy life
B. every day Clint would tell the writer that he loved her
C. it helped her to regain her self respect
D. it made her children happy ,which is all she cared about in life
【单选题】
What was Goodall's childhood dream ?___
A. She dreamed of going to college .
B. She dreamed of studying animals in Africa .
C. She dreamed of becoming a scientist .
D. She dreamed of traveling all around the world .
【单选题】
What did Goodall's mother think of her dream ?___
A. As a girl she should not go to the African jungle .
B. Her dream would remain a dream unless she got the right training .
C. As a girl she should stay away from violent animals .
D. She could make her dream come true if she was determined .
【单选题】
Goodall's most important discovery was that___
A. some animals use tools
B. like humans animals have emotions
C. chimpanzees could attack each other violently
D. termites are chimpanzees'favorite food
【单选题】
Goodall's success is chiefly due to her___
A. exceptional talents
B. scientific training
C. determination and patience
D. enthusiasm and good luck
【单选题】
What is Goodall doing now ?___
A. Studying animal behavior at Cambridge University .
B. Raising funds for the preservation of wildlife .
C. Observing chimpanzees in African jungles .
D. Working hard supervising postgraduate students.
【单选题】
___是我们理解当前所处历史方位的关键词。
A. 新时期
B. 新时代
C. 重要战略机遇期
D. 关键期
【单选题】
中国特色社会主义进入新时代,意味着科学社会主义在21世纪的中国焕发出强大生机活力,在世界上高高举起了___伟大旗帜。
A. 小康社会
B. 社会主义现代化强国
C. 和谐社会
D. 中国特色社会主义
【单选题】
“思想道德修养与法律基础”,是一门融思想性、政治性、科学性、理论性、实践性于一体的___课。
A. 专业基础
B. 通识教育
C. 思想政治理论
D. 专业选修
【单选题】
党的十九大提出到本世纪中叶,要把我国建设成富强、民主、文明、和谐、___的社会主义现代化强国。
【单选题】
思想道德和___都是调节人们思想行为、协调人际关系、维护社会秩序的重要手段。
