【单选题】
判断题当人体同时接触带电设备或线路中的两相导体时,电流从一相导体经人体流入另一相导体,构成闭合回路的触电事故称为两相触电。___
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相关试题
【单选题】
判断题部分停电的工作,安全距离小于规定距离以内的未停电设备,应装设临时遮栏。___
【单选题】
判断题二次线圈有无开路,接地线是否良好,有无松动和断裂现象,是电流互感器巡视检查项目之一。___
【单选题】
判断题电流互感器运行前检查外壳及二次侧应接地正确良好,接地线连接应坚固可靠。___
【单选题】
判断题新安装或大修后的断路器,投入运行前必须验收合格才能施加运行电压。___
【单选题】
单选题从区域变电所到用户变电所或城乡电力变压器之间的线路,是用于分配电能的,称为___。
【单选题】
判断题在电阻串联的电路中,电路的总功率等于各串联电阻的功率之和。___
【单选题】
判断题触头断开后,触头之间如果电弧已熄灭,则电路实际上没有被切断。___
【单选题】
单选题运行过程中易发生过负荷和需要防止起动或自起动时间过长的电动机应装设___。
A. 过负荷保护
B. 低电压保护
C. 失步保护
【单选题】
单选题消弧线圈实际是一个铁芯线圈,其___很小,电抗很大。
【单选题】
判断题运行中的电压互感器内部有放电声及其他噪声,线圈与外壳之间或引线与外壳之间有火花放电现象,应立即退出运行。___
【单选题】
单选题高压电气设备停电检修时,防止检修人员走错位,误入带电间隔及过分接近带电部分,一般采用___进行防护。
【单选题】
单选题断路器的分合闸指示器应___,并指示准确。
A. 用金属物封闭
B. 可随意调整
C. 易于观察
【单选题】
判断题交流高压真空接触器利用真空开关管熄灭电弧。___
【单选题】
单选题值班人员发现任何异常现象应及时消除,不能及时消除时,除及时报告上级领导外,还应记入运行记录簿和___。
A. 检修记录簿
B. 缺陷记录薄
C. 事故记录薄
【单选题】
判断题配电网的电压根据用户负荷情况和供电要求而定,配电网中又分为高压配电网(一般指及以上电压)中压配电网(一般指电压)及低压配电网()。___
【单选题】
判断题基本安全用具是指那些主要用来进一步加强基本安全用具绝缘强度的工具。___
【单选题】
42.判断题高压电容器的瓷套管发生严重放电闪络时,只要加强监视,不需要将电容器立即退出运行。___
【单选题】
判断题型避雷器残压比型避雷器残压低,适合作为发电厂和变电所电气设备的防雷保护。___
【单选题】
判断题如果将电流表并联在线路中测量,则电流表有可能会因过载而被烧坏。___
【单选题】
45.单选题可以不断开线路测量电流的仪表是___。
【单选题】
判断题感抗与线圈的电感和交流电频率成反比。___
【单选题】
判断题电力系统中的各级电压线路及其联系的各级变配电所,这一部分叫做电力网,或称电网。___
【单选题】
判断题当验明设备确己无电压后,应立即将检修设备三相短路并接地。___
【单选题】
判断题线路金具是指连接和组合线路上各类装置,以传递机械电气负荷以及起到某种防护作用的金属附件。___
【单选题】
单选题-/表示三相自然循环风冷有载调压,额定容量为(),高压绕组额定电压电力变压器。___
A. 10000
B. 36500
C. 8000
【单选题】
判断题电压和电位差的单位都是欧姆,用字母表示。___
【单选题】
单选题下列___安全用具是在电气操作中使用的基本安全用具。
A. 绝缘手套验电器
B. 绝缘鞋绝缘站台
C. 验电器绝缘夹钳
【单选题】
单选题单支避雷针的保护范围是一个___。
A. 带状空间
B. 圆柱空间
C. 近似锥形空间
【单选题】
单选题-型高压开关柜采用电缆出线时,如需要装设零序电流互感器,零序电流互感器一般装设在___。
A. 主母线室
B. 吊装在电缆室内
C. 吊装在电缆室柜底板外部
【单选题】
判断题作为一名电气工作人员,对发现任何人员有违反《电业安全工作规程》,应立即制止。___
【单选题】
判断题避雷针在地面上的保护半径是.倍避雷针总高度。___
【单选题】
判断题实验证明,在纯电容电路中,交流电的频率越高,容抗就越大。___
【单选题】
单选题通过电磁感应现象可以知道,线圈中磁通变化的频率越快,线圈的感应电动势___。
【单选题】
判断题变电所运行中,如交接班时发生事故,应由接班人员负责处理。___
【单选题】
判断题工作许可人(运行值班负责人)应负责审查工作票所列安全措施是否正确完善,是否符合现场条件,并负责落实施工现场的安全措施。___
【单选题】
单选题电力电缆中,将线芯与大地以及不同相的线芯间在电气上彼此隔离的为___。
【单选题】
单选题继电保护的()是指发生了属于它该动作的故障,它能可靠动作而在不该动作时,它能可靠不动。___
【单选题】
判断题系统是指电源中性点直接接地,而设备的外露可导电部分经各自的线分别直接接零线的三相四线制低压供电系统。___
【单选题】
单选题运行中的断路器日常维护工作包括对___的定期清扫。
A. 不带电部分
B. 绝缘部分
C. 二次控制回路
【单选题】
判断题接地系统的单相触电比不接地系统的单相触电危险性大。___
推荐试题
【单选题】
Q4: What is the main idea of the passage?___
A. People should learn to manage their emotions .
B. People should be patient with their negative feelings .
C. People should learn to analyze causes of unhappiness .
D. People should identify as many positive feelings as possible .
【单选题】
Q1: What are the man and woman talking about?___
A. Whether nature is magical and kind .
B. Whether nature is powerful and full of risks .
C. Whether Christopher was well prepared for the trip .
D. Whether Christopher's trip to Alaska was worthwhile .
【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
