【单选题】
长沙地铁一期工程车辆空调机组选用的制冷剂为___。
A. R134a
B. R22
C. R407C
D. R413
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相关试题
【单选题】
长沙地铁1号线车辆最大运行速度为___km/h。
【单选题】
在长沙地铁1号线车辆中不会导致列车牵引封锁的为___。
A. 客室车门没有关好
B. 主风缸压力值为6BAR
C. 停放制动没有缓解
D. 单个车门被切除
【单选题】
在长沙地铁1号线车辆中由车辆自动控制的制动类型为___。
A. 紧急制动
B. 快速制动
C. 常用制动
D. 保持制动
【单选题】
关于快速制动，下列说法正确的是___。
A. 快速制动是电空混合制动
B. 快速制动是不可恢复的制动
C. 快速制动力小于常用制动力
D. 快速制动的控制气路与紧急制动相同
【单选题】
下列部件不属于主电路系统的是___。
A. 受电弓
B. 高速断路器
C. 充电机
D. 制动电阻
【单选题】
蓄电池充电机基本特点中，当蓄电池充电机无法正常启动时，应具有___功能。
A. 快速启动
B. 慢速启动
C. 强制启动
D. 紧急启动
【单选题】
牵引系统中网压额定最高限值为___V。（摘自维修手册）
A. 2100
B. 1950
C. 1850
D. 1500
【单选题】
长沙地铁1号线列车受电弓的额定工作气压是___。
A. 550kPa
B. 500kPa
C. 450kPa
D. 650kPa
【单选题】
每辆动车安装的轴端接地装置的数量是___。
【单选题】
长沙地铁1号线列车将方向手柄置于向后位时牵引列车，列车自身最高限速为___。
A. 3km/h
B. 10km/h
C. 60km/h
D. 45km/h
【单选题】
三月检轮径测量当一辆车平均轮径值小于___时，在二系弹簧下添加12mm垫片。
A. 813mm
B. 815mm
C. 816mm
D. 817mm
【单选题】
三月检轮径测量当一辆车平均轮径值小于___时在二系弹簧下添加第二个12mm垫片。
A. 792mm
B. 793mm
C. 794mm
D. 795mm
【单选题】
三月检供风单元各部件检查要求安装牢固、各紧固件及管路接头防松线清晰无错位，截断塞门手柄处于与管路___位置。
A. 水平
B. B、垂直
C. C、呈45°
D. D、呈60°
【单选题】
三月检检查闸瓦裂纹状态要求闸瓦中间75mm部分裂纹宽度施加时大于（ ），缓解时大于（ ），立即进行更换。___
A. 4 mm,2 mm
B. 3mm,2mm
C. 5mm,2mm
D. 6mm,2mm
【单选题】
三月检检查闸瓦裂纹状态要求闸瓦中间75mm以外部分，裂纹深度超过（ ），裂纹宽度超过（ ），裂纹长度贯通整个摩擦接触面，立即进行更换。___
A. 9.5mm,2 mm
B. 9.5mm,1mm
C. 8.5mm,2mm
D. 8.5mm,1mm
【单选题】
三月检检查制动缓解时闸瓦与踏面间的间隙要求为___。
A. 13～22mm
B. 13～24mm
C. 12～25mm
D. 13～26mm
【单选题】
在三月检高速断路器的检查中，不属于检查范围的是___。
A. 高速断路器安装状态
B. B、 高速断路器灭弧器安装状态
C. 高速断路器绝缘隔板安装状态
D. D、 检查电弧产生的触头磨损
【单选题】
长沙地铁车辆车钩缓冲装置具有能量吸收功能，按能量吸收能力的大小排列顺序，正确的是___。
A. EFG3缓冲器 过载保护装置 可压溃变形管
B. 过载保护装置可压溃变形管 EFG3缓冲器
C. EFG3缓冲器 可压溃变形管 过载保护装置
D. 过载保护装置
E. FG3缓冲器 可压溃变形管
【单选题】
长沙地铁2号线一期车辆半自动车钩车钩杆上的可压溃管的行程为___
A. 200mm
B. 100mm
C. 300mm
D. 185mm
【单选题】
长沙地铁2号线一期车辆全自动车钩车钩杆上的可压溃管的行程为___。
A. 200mm
B. 100mm
C. 300mm
D. 185mm
【单选题】
长沙地铁2号线一期车辆半永久牵引杆车钩杆上的可压溃管的行程为___。
A. 200mm
B. 100mm
C. 300mm
D. 185mm
【单选题】
当两列AW0 列车以7km/h 相对速度相互碰撞时，其冲击能量由___吸收。
A. EFG3缓冲器
B. 过载保护装置
C. 可压溃变形管
D. 司机室
【单选题】
长沙地铁2号线一期车辆的空气弹簧上表面距轨面高度是___km/h。
A. 500
B. 894
C. 1000
D. 1100
【单选题】
车钩的水平和垂直最大摆动角度分别为___。
A. ± 25°，± 8°
B. ± 15°，± 6°
C. ± 25°，± 6°
D. ± 15°，± 8°
【单选题】
司机室外侧采用整体式非饱和聚酯玻璃钢头罩，内侧靠铝合金骨架支撑，头罩与车体之间采用___连接方式。
【单选题】
当网压达到最大设定值（ ）时，DCU/M会打开制动电阻，将电机上的制动能量转变成电阻的热能消耗掉。___
A. 1800V
B. 1850V
C. 1950V
D. 2000V
【单选题】
再生制动与电阻制动之间的转换由（ ）控制，能保证它们连续交替使用，转换平滑，变化率不能为人所感受到。___
A. EBCU
B. EDCU
C. DCU/M
D. BECU
【单选题】
长沙地铁2号线闸瓦内侧面有一个台阶，到闸瓦背面的距离为___,此台阶为闸瓦磨耗线，磨耗到此台阶则需更换闸瓦。
A. 11mm
B. 12mm
C. 13mm
D. 14mm
【单选题】
长沙地铁2号线闸瓦采用的是西屋制动提供的（ ），它具有修复踏面的功能，可以有效地减少车轮寿命周期中的镟轮次数，延长车轮使用寿命。___）
A. V-659型
B. V-669型
C. V-679型
D. V-689型
【单选题】
长沙地铁2号线闸瓦在需要退后的情况下，比如停放缓解后闸瓦没能完全离开车轮，可以使用调节螺栓将闸瓦退后___。
A. 13mm
B. 15mm
C. 18mm
D. 20mm
【单选题】
长沙地铁2号线为防止空簧破裂时发生车辆倾斜，当两个空簧内压力差大于___时，两个空簧会导通。
A. 100kPa
B. 1500kPa
C. 200kPa
D. 250kPa
【单选题】
用于开关门的脉冲信号，至少持续___毫秒，将被门控器接受。
A. 250
B. 300
C. 280
D. 320
【单选题】
右关门障碍物探测次数调整范围：___。
A. 1-3次
B. 1-4次
C. 1-5次
D. 1-6次
【单选题】
强开门___合位：此时允许信号由零速信号替代；零速有效，左/右门允许均有效，左/右门开按钮上的红色指示灯均点亮。
A. =81-S101
B. =81-S102
C. =81-S103
D. =81-S104
【单选题】
门零速旁路 ___ 合位：当零速信号故障时，激活开关给门控“零速”信号。
A. =81-S104
B. =81-S109
C. =81-S107
D. =81-S105
【单选题】
客室侧门开门/关门时间：___。
A. 2.0±0.5s
B. 3.0±0.5s
C. 2.5±0.5s
D. 3.5±0.5s
【单选题】
如需从外部手动开门，每辆车的___门各配备了一个外紧急装置。
A. 7号和8号
B. 1号和8号
C. 2号和7号
D. 3号和5号
【单选题】
门关好旁路 ___合位：绕过门安全回路，允许牵引。
A. =81-S104
B. =81-S110
C. =81-S107
D. =81-S105
【单选题】
LCD播放声音的音量可以从单个LCD进行调节，也可以配置VDP中的___对相应侧进行调节。
A. SD卡
B. CF卡
C. MS卡
D. MMC卡
【单选题】
CF卡的存储文件格式为___
A. JPG
B. TXT
C. MP3
D. MP4
推荐试题
【单选题】
中国共产党要把______这场伟大的革命进行好，党必须进行自我革命，全面增强党的执政本领。 ___
A. 新时代经济体制改革
B. 新时代政治体制改革
C. 新时代坚持和发展中国特色社会主义
D. 新时代中国改革开放
【单选题】
中国特色社会主义道路是实现社会主义现代化、创造人民美好生活的______。___
A. 理论依据
B. 必由之路
C. 根本保障
D. 行动指南
【单选题】
确保党始终总揽全局、协调各方，必须____。___
A. 得民心者得天下
B. 坚持和完善党的领导的体制机制
C. 学习达国家的经验
D. 选举优秀领导人
【单选题】
增强面对新时代新使命,必须在全党营造善于学习、勇于实践的浓厚氛围，建设马克思主义____政党。 ___
A. 人民型
B. 事业型
C. 研究型
D. 学习型
【单选题】
必须坚持党的（ ），既要充分发扬民主，又要善于集中。 ___
A. 集中民主制
B. 民主集中制
C. 多党合作制
D. 全民民主制
【单选题】
党是最高政治领导力量，是推进伟大事业的（ ）保证。 ___
【单选题】
According to one study, what do green spaces do to people? ___
A. Improve their work efficiently.
B. Add to their sustained happiness.
C. Help them build a positive attitude towards life.
D. Lessen their concerns about material well-being.
【单选题】
What does Dr. White say people usually do to make themselves happier? ___
A. Earn more money.
B. Settle in an urban area.
C. Gain fame and popularity.
D. Live in a green environment.
【单选题】
What does Dr. White try to find out about living in a greener urban area? ___
A. How it affects different people.
B. How strong its positive effect is.
C. How long its positive effect lasts.
D. How it benefits people physically.
【单选题】
What did Dr. White’s research reveal about people living in a green environment? ___
A. Their stress was more apparent than real.
B. Their decisions required less deliberation.
C. Their memories were greatly strengthened.
D. Their communication with others improved.
【单选题】
According to Dr. White, what should the government do to build more green spaces in cities? ___
A. Find financial support.
B. Improve urban planning.
C. Involve local residents in the effort.
D. Raise public awareness of the issue.
【单选题】
The survey by the Kaiser Family Foundation is mentioned to illustrate the idea that . ___
A. kids don’t always follow parents’ rules
B. only few parents believe the good news
C. much media use results in bad health
D. parents’ rules make a huge difference
【单选题】
What did the kids do when parents set any time or content limits, according to the Kaiser Family Foundation? ___
A. They cut down on their screen time.
B. They appreciated their parents’ love.
C. They spent more time staying outdoor.
D. They accepted parents’ rules unwillingly.
【单选题】
What will Kenneth Ginsburg most probably suggest that parents should do? ___
A. Avoid setting firm rules.
B. Avoid ruling with an iron grip.
C. Set rules after family discussion.
D. Set rules that are easy to understand.
【单选题】
Margaret Broe -Fitzpatrick finds it impossible. ___
A. to achieve just- right parenting
B. to keep track of everything done by the kids
C. for the kids to face rules alone
D. for the kids to observe rules without protest
【单选题】
The passage is mainly intended for parents . ___
A. whose kids have difficulty in self- discipline
B. whose kids are addicted to media use
C. who have doubts about setting rules
D. who are too busy to care for their kids
【单选题】
The word “it” (Para. 2) most probably refers to. ___
A. the lack of stable communities
B. the breakdown of informal information channels
C. the increased mobility of families
D. the growing number of people moving from place to place
【单选题】
The main problem people may encounter today arises from the fact that . ___
A. they have to learn new things consciously
B. they lack the confidence of securing reliable and trustworthy information
C. they have difficulty obtaining the needed information readily
D. they can hardly carry out casual communications with an extended family
【单选题】
From the passage we can infer that _______. ___
A. electronic mail will soon play a dominant role in transmitting messages
B. it will become more difficult for people to keep secrets in an information era
C. people will spend less time holding meetings or conferences
D. events will be reported on the spot mainly through satellites
【单选题】
Technology facilitates _______. ___
A. sharing information
B. storing and sending information
C. providing people with easy access to more information
D. all of the above
【单选题】
We can learn from the last paragraph that _______. ___
A. it is necessary to obtain as much
B. people should make the best use of the information
C. we should realize the importance of accumulating information
D. it is of vital importance to acquire needed information efficiently
【单选题】
The author thinks that people are _________. ___
A. satisfied with their appearance
B. concerned about appearance in old age
C. far from neglecting what is in fashion
D. reluctant to follow the trends in fashion
【单选题】
Fashion magazines and TV advertisements seem to link fashion to _________. ___
A. confidence in life
B. personal dress
C. individual hair style
D. personal future
【单选题】
Causes of fashions are _________. ___
A. uniform
B. varied
C. unknown
D. inexplicable
【单选题】
Present-day society is much freer and easier because it emphasizes _________. ___
A. uniformity
B. formality
C. informality
D. individuality
【单选题】
Which is the main idea of the last paragraph? ______________ ___
A. Care about appearance in formal situations.
B. Fashion in formal and informal situations.
C. Ignoring appearance in informal situations.
D. Ignoring appearance in all situations.
【单选题】
Permissive parents would ________. ___
A. let their children read any books they like to
B. not let their children see any films they like to
C. not let their children read any books without first checking their contents
D. let their children see the films with their first checking
【单选题】
The fact that parents check the contents of the book or the film for their children to read or see shows __________. ___
A. the necessity of censorship
B. that many books and films are bad
C. that children need their parents to help them understand more
D. that the parents are permissive
【单选题】
Which of the following statements is NOT true?____________ ___
A. Some adults can’t tell right from wrong.
B. Censorship is compared to the law because both of them perform good service to society as a whole.
C. Censors pay attention only to genuine works of art.
D. Censorship is necessary because many books, plays and films are far from being “works of art”.
【单选题】
What does the word “corrupt” in Para.4 mean?__________ ___
A. Make morally bad.
B. Hurt.
C. Injure.
D. Damage.
【单选题】
What would be the best title of this passage?_____________ ___
A. Permissive Parents and Responsible Parents.
B. Censorship and the Law.
C. Censors Value Artistic Merits .
D. Censorship Performs Good Service to Society.
【单选题】
Lie detectors are widely used in the United States because _____________. ___
A. they can help detect people’s emotional stress
B. they can help detect people's physiological changes
C. they can help find out whether a person is telling the truth or not
D. they can measure the subject’s electrical resistance
【单选题】
According to the passage, we know that Britain______________. ___
A. will adopt lie detectors widely
B. will adopt lie detectors on a smaller scale
C. adopt lie detectors
D. has not decided whether to adopt lie detectors or not
【单选题】
The tests themselves are by no means free from error..." (Line 1-2.Para.3) means ____________. ___
A. the tests definitely have no error
B. the tests sometimes make mistakes
C. the polygraphers do not make mistakes
D. the polygraphers can avoid error by using some techniques
【单选题】
Which of the following is true? ________________ ___
A. The tests are conducted by qualified polygraphers.
B. Innocent people may blush or stammer when questioned.
C. Guilty people can definitely be found out by answer questions
D. Guilty people may escape by refusing to answer questions.
【单选题】
What troubles lie detector researchers most is that _______________. ___
A. innocent people are convicted crimes
B. innocent people will learn to tell lies
C. lie detectors may cause industrial unrests
D. lie detectors are sometimes not dependable
【单选题】
In the passage the author's attitude towards "mixed-ability teaching" is _______. ___
A. critical
B. questioning
C. approving
D. objective
【单选题】
By "held back" (Line 1) the author means _____. ___
A. made to remain in the same classes
B. forced to study in the lower classes
C. drawn to their studies
D. prevented from advancing
【单选题】
The author argues that a teacher's chief concern should be the development of the student's _________. ___
A. personal qualities and social skills
B. total personality
C. learning ability and communicative skills
D. intellectual ability
【单选题】
Which of the following is NOT MENTIONED in the third paragraph? __________ ___
A. Group work gives pupils the opportunity to learn to work together with others.
B. Pupils also learn to develop their reasoning abilities.
C. Group work provides pupils with the opportunity to learn to be capable organizers.
D. Pupils also learn how to participate in teaching activities.
