【多选题】
以下条件均满足时，认为拖车速度不可信，一旦出现锁定至停车。___ （摘自维修手册）
A. 网络生命信号中断
B. 紧急牵引工况
C. 本车速度与列车参考速度差超过8km/h持续0.1s
D. 牵引电机速度传感器故障
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相关试题
【多选题】
以下条件都满足时，DCU认为洗车模式有效。___（摘自维修手册）
A. 网络正常
B. DCU收到“洗车”指令
C. 紧急制动未施加
D. 信号系统在切除状态
【多选题】
下列原因可能会导致弓网故障的是___。（摘自车辆检修工教材）
A. 路基引起受电弓运行线偏离原运行中心线
B. 接触网位移
C. 接触网网压为零
D. 受电弓变形及弓头维修指标不合要求
E. 外界因素，如风速大、接触网有异物
【多选题】
长沙地铁1号线列车SIV当出现以下条件时SIV会停机：___（摘自维修手册）
A. 输入电压低于950V；
B. DC110V 控制电源关闭；
C. 停止指令。
D. 通讯故障
【多选题】
长沙地铁1号线列车通过司机台紧急制动按钮（蘑菇按钮）施加紧急制动时，会触发___。（摘自车辆电气原理图）
A. 受电弓降弓
B. 高速断路器断开
C. 客室空调停止工作
D. 启动紧急照明
【多选题】
快速制动时，由___调整预控压力。（摘自维修手册）
A. 紧急制动电磁阀
B. 电子中继阀
C. 变载荷阀
D. 压力开关
【多选题】
TCMS在以下情况下进行限速检测：___。（摘自维修手册）
A. 当2个DCU故障TCMS进行60km/h限速检测
B. 当切除3节车以上制动，TCMS进行35km/h限速检测
C. 当退行时，TCMS进行10km/h限速检测
D. 当慢行模式时，TCMS进行3km/h限速检测
【多选题】
长沙地铁车辆采用了先进的微机控制技术，并具有故障自诊断功能。如___均采用了微机控制技术。（摘自维修手册）
A. 牵引控制单元
B. 辅助逆变器控制单元
C. 电子制动控制单元
D. 空调控制单元
E. 车门控制单元
【判断题】
空气净化单元主要包括气/水分离器、高效过滤器、干燥器、灰尘过滤器、自动排污阀等。
【判断题】
长沙地铁1号线风源系统最小压力阀安装在机体上，位于油细分离器座的后部，初始开启压力为0.3～0.5MPa。
【判断题】
门控器包含2个安全继电器，仅通过硬线信号激活。
【判断题】
安全继电器在列车运行时断电，因此到驱动机构解锁装置（齿轮制动）的电路被断开，如此可以防止由于软件故障造成的意外开门。
【判断题】
门控器安全继电器激活车门的解锁装置（齿轮制动）。启动安全继电器后，安全继电器的零电势触点将打断车门已关闭回路。
【判断题】
本地门到位开关S1 的常闭触点、紧急解锁开关S3 的常闭触点与安全继电器的常闭触点串联形成回路后与隔离开关S5 的常开触点进行并联，组成了本地车门的安全回路。
【判断题】
再生制动与电阻制动之间的转换由网络控制，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。
【判断题】
列车气制动具有独立的滑行保护功能，而电制动具有独立的滑行保护功能。
【判断题】
快速制动与紧急制动设计的减速率都为1.2 m/s2，快速制动与紧急制动区别在于快速制动在制动时不断开安全回路。
【填空题】
1.三月检客室灯罩间隙检查要求灯罩与灯罩之间的缝隙小于2mm。___
【填空题】
2.功率放大器模块用于对列车音频总线传来的信号进行功率放大，使乘客听到各种所需的到发信息。___
【填空题】
3.停放制动不同于一般的充气→制动，排气→缓解，它是通过弹簧作用力而产生制动作用，能满足列车较长时间断电停放的要求。___
【填空题】
4.客室车门防挤压力：峰值力Fp＜300N；在第一次试图关门过程中的有效力Fe＜150N；在进一步试图关门过程中的平均有效力Fe＜200N。___
【填空题】
5.长沙地铁1号线车辆转向架的轮缘润滑方式采用湿式润滑装置。___
【填空题】
6.每台空调机组制冷时部件启动顺序为通风机、冷凝风机、压缩机。___
【填空题】
7.当新风温度高于45℃时，机组卸载运行，如果当前机组运行在全冷模式，则压缩机减半运行，机组运行在高温卸载模式；当新风温度高于52℃时，冷凝风机和压缩机全部停止工作，机组工作在通风模式。___
【填空题】
8.空调机组高压压力开关动作值为3.0±0.15MPa断开，2.4±0.15MPa 接通。___
【填空题】
9.空调机组低压压力开关动作值为0.15±0.03MPa 接通，0.05±0.04MPa断开。___
【填空题】
10.假设每节车自己制动。总共需要300%的制动力，因此气制动时，每节车的EBCU根据每节车的重量，负责本车100%的制动力。___
【填空题】
11.列车在正常情况制动都采用常用制动模式。最大常用制动平均减速度为1.0 m/s2。___
【填空题】
12.主门控器通过MVB网络与列车控制单元连接，主门控器通过CAN 总线与从门控器通讯。___
【填空题】
13.牵引逆变器通过正相序或反相序输出交流电来控制牵引电机和车辆轮对的正转或者反转，来实现司机所期望的列车“向前”或者“向后”运行。___
【填空题】
14.TCMS 参与地铁列车的空电混合制动控制，制动力的计算和分配由制动系统完成。___
【填空题】
15.EDRM记录容量 8G，采样周期 100ms___
【填空题】
16.当列车处于非ATO 模式下时，保持制动的施加由制动系统负责，保持制动的缓解由TCMS 负责。___
【填空题】
17.当TCMS故障时，保持制动的管理全部由制动系统自身负责。___
【填空题】
18.在ATO 模式下，TCMS 仅接受来自ATO 的保持制动命令。___
【填空题】
19.牵引装置由牵引座和牵引杆组成，牵引装置用来实现转向架与车体之间的连接。___
【填空题】
20.二系悬挂装置由两个空气弹簧组成，通过高度调节阀可自动调节车体高度，补偿乘客载荷的变化。___
【简答题】
简述长沙地铁1号空压机空气净化单元工作流程。（摘自车辆检修工教材）
答：进入本单元的压缩空气首先通过气水分离器分离压缩空气中的液态水、油和部分固体粒子，分离出来的液态水、油和固体粒子等污染物通过电磁排污阀自动排出；经气水分离器初步分离净化的压缩空气接着进入高效过滤器进行过滤净化，过滤凝聚的水（雾）、油（雾）及各种粒子等污染物通过电磁排污阀自动排出；经高效过滤器过滤后的压缩空气接着进入吸附式干燥器进行干燥净化以去除压缩空气中的水蒸汽；经吸附式干燥器干燥后的压缩空气接着进入灰尘过滤器过滤净化以去除吸附式干燥器在运行过程中产生并由压缩空气携带的粉尘，过滤聚结的粉尘通过手动排污阀人工定期排放；经灰尘过滤器过滤后的压缩空气最后进入用气端。
【简答题】
保压制动是为防止车辆在停车前的冲动，使车辆平稳停车，EBCU内部设定的执行程序，请简述它是如何实施的。（摘自车辆检修工教材）
答：它分两个阶段实施：
第一阶段：当列车制动到速度低于设定的摩擦制动介入值后，牵引控制单元触
发保压制动信号，同时输出给EBCU，这时，由牵引控制单元控制的电制动逐步
退出，由EBCU控制的气制动替代。
第二阶段：接近停车时，一个小于制动指令的保压制动由EBCU开始自动实施，即瞬时地将制动缸压力降低。
【简答题】
在什么情况下才可以实现开门？（摘自维修手册）
答：（1）零速信号激活
（2）使能信号激活
（3）有开门指令
（4）此外必须出现下列情况:
车门未隔离
紧急装置未操作
如果上述任一情况未出现，无法实现开门。
推荐试题
【单选题】
Q2: Where did J. K. Rowling come up with the idea for Harry Potter?___
A. At a cafe .
B. On a train .
C. At a cinema .
D. In a bookstore .
【单选题】
Q3: What are J. K. Rowling’s future plans?___
A. She won't write any more books .
B. She will write more magic stories .
C. She hasn't said anything about her future plans .
D. She said she would work on more serious subjects .
【单选题】
Q4: What are the two speakers mainly talking about?___
A. J.K. Rowling's secret .
B. J .K .Rowling's writing plan .
C. A new book by J .K.Rowling.
D. An interview with J .K .Rowling .
【单选题】
Q1: What happened when Stephen tried to remove a bottle of milk from the refrigerator?___
A. He broke the milk bottle .
B. He fell down on the floor .
C. He made a mess inside the refrigerator .
D. He spilled the milk over the kitchen floor .
【单选题】
Q2: What did Stephen’s mother do when she came into the kitchen？___
A. She gave him a long lecture .
B. She shouted at him in anger .
C. She enjoyed the wonderful mess .
D. She cleaned up the mess with him .
【单选题】
Q3: What did Stephen’s mother teach him later?___
A. How to do an experiment .
B. How to carry a milk bottle .
C. How to clean up spilled milk .
D. How to avoid making mistakes .
【单选题】
Q4: What did Stephen learn from this experience?___
A. Mistakes can become learning opportunities .
B. Mistakes are just like scientific experiments .
C. One should sometimes make mistakes .
D. One should try to avoid making mistakes .
【单选题】
Q1: Why is surfing the man’s favorite activity?___
A. Because he likes the sunny weather.
B. Because he wants to challenge himself .
C. Because it can help solve his sleeping problem .
D. Because it can help him forget all his troubles .
【单选题】
Q2: What is the woman going to do this weekend?___
A. To go sailing .
B. To go surfing .
C. To go to the beach .
D. To go to her nephew's .
【单选题】
Q3: What does the woman love doing?___
A. Going to visit relatives.
B. Enjoying the warm sun on the beach .
C. Building sand castles with her niece and nephew .
D. Playing in the sand and jumping in the waves .
【单选题】
Q4: What does the man remember doing with his brothers?___
A. Surfing in the sea .
B. Collecting seashells .
C. Building sand castles .
D. Jumping in the waves .
【单选题】
Q1: According to the survey, what percentage of British adults watched TV in theirfree time?___
A. 89 percent .
B. 84 percent .
C. 76 percent .
D. 71 percent .
【单选题】
Q2: Which age group would be the most likely to visit their friends and relatives?___
A. People aged 16 to 24
B. People aged 25 to 34 .
C. People aged 16 and over .
D. People aged 55 and over .
【单选题】
Q3: What does the speaker say about listening to music as a leisure activity for British people?___
A. People aged 16 to 24 preferred listening to music most .
B. It was getting more and more popular among the British people .
C. It was the third most popular activity among people aged 55 and over .
D. People aged 25 to 34 listened to music more often than those aged 16 to 24 .
【单选题】
Q4: According to the survey, how are leisure activities related to age?___
A. Older people go out to pubs more often . frequently .
B. Younger people go to the cinema less frequently.
C. Older people spend more time reading and gardening .
D. Younger people spend less time visiting friends and family .
【单选题】
Q1: Why was the girl excited?___
A. She is going to have a lot of vanilla ice cream .
B. She won the spelling competition at her school .
C. She is going to the state capital for a competition .
D. She "excellence"correctly,but others didn't .
【单选题】
Q2: What happened when the man was 13 years old?___
A. His family moved to Sacramento to settle down .
B. His family bought him a new suit and a new tie .
C. He went to Sacramento for a spelling competition .
D. He won the first prize in the state spelling competition .
【单选题】
Q3: Why did the man’s mom give him a big hug?___
A. To make him feel better after he lost the first prize .
B. To apologize for not buying him some ice cream .
C. To wish him good luck in the next competition .
D. To congratulate him on winning the first prize .
【单选题】
Q4: What color is the girl going to wear for her next competition?___
A. Red .
B. Blue .
C. Green .
D. Yellow .
【单选题】
Q1: What is this passage mainly about?___
A. Superstitions and science .
B. Tips on how to have good luck .
C. Superstitions in the United States .
D. Rational and superstitious societies .
【单选题】
Q2: According to the passage, what is considered as bad luck?___
A. Walking under a ladder .
B. Dreaming of a black cat .
C. Hanging a mirror in the house .
D. Stepping on one's own shadow .
【单选题】
Q3: Why is it considered bad luck to see a black cat crossing one’s path?___
A. Because black cats look like witches . e witches .
B. Because black cats were thought to be witches .
C. Because black cats bring seven years of bad luck .
D. Because black cats are hard to notice in darkness .
【单选题】
Q4: According to the passage, what will bring people good luck?___
A. Breaking a mirror on purpose .
B. Catching a falling leaf on one's birthday .
C. Finding a on the ground and picking it up .
D. Dreaming of blowing out the candles in one blow .
【单选题】
Q1: How long will the woman spend on her way to and from work by high-speed train?___
A. 4 hours .
B. 2 hours .
C. 1.5 hours .
D. 45 minutes .
【单选题】
Q2: When does the woman arrive back home by subway?___
A. At 8 .
B. At 7 .
C. At 6 .
D. At 5 .
【单选题】
Q3: According to the woman, in what way will the new high-speed train be a big help to her?___
A. She can either read or rest a little on the train .
B. She can read and respond to emails onthe train .
C. She can travel to many different parts of the city .
D. She can go shopping on her way home from work .
【单选题】
Q4: How will the new high-speed train affect the man?___
A. He can take the train to the old part of the city .
B. He can save a lot of money when he takes the train .
C. He can save 20 minutes to go to work with the train .
D. He can take the train to the airport instead of driving .
【单选题】
Q1: How much time on average do Americans spend on their way to work?___
A. About an hour .
B. More than an hour .
C. About half an hour .
D. More than one and a half hours .
【单选题】
Q2: What is the present situation about Americans’ commuting to work?___
A. More and more Americans spend over an hour getting to work .
B. Over 10 percent of Americans spend less than an hour getting to work .
C. Only New York people spend more than 90 minutes getting to work .
D. Over 10 percent of Americans spend more than 90 minutes getting to work .
【单选题】
Q3: Why does Steven choose to have an extreme commute?___
A. Because gas prices are not high .
B. Because the commute is not tiring .
C. Because he can attend a better school .
D. Because he can have his favorite lifestyle .
【单选题】
Q4: Which of the following is the disadvantage of long commutes?___
A. Traffic jams .
B. Expensive housing .
C. Poorer life quality .
D. A tiring and boring trip .
【单选题】
Q1: What did Katy like about Jason’s last Halloween party?___
A. She liked playing an interesting game .
B. She enjoyed seeing many of her old friends .
C. She enjoyed wearing her Halloween costume .
D. She liked the decorations in Jason's front yard .
【单选题】
Q2: What is the actual reason that Katy doesn’t want to attend Jason’s party?___
A. None of her friends likes Jason .
B. None of Jason's guests is young .
C. She wants to go to Linda's party ..
D. She went to Jason's party last year .
【单选题】
Q3: What is special about Linda’s party?___
A. The party will last four hours .
B. Six people will attend the party .
C. They will have huge bags of candy .
D. They will play a new game called "GuessWho ".
【单选题】
Q4: What will Katy do to solve her problem?___
A. Go to Jason's party .
B. Go to Linda's party .
C. Attend both Jason's and Linda's parties .
D. Celebrate Halloween with her parents .
【单选题】
Q1: What is special about this year’s Black Friday shopping?___
A. Some stores offered bigger holiday discounts .
B. Some stores provided more choices of nightlife.
C. Some stores made efforts to attract young people .
D. Some stores opened much earlier than they used to .
【单选题】
Q2: Why did some stores open at midnight on Thanksgiving night?___
A. To attract young customers .
B. To beat other stores for sale.
C. To let people sleep late the next day .
D. To keep people stay up for the night .
【单选题】
Q3: How many Black Friday shoppers were reported to go to the shops at midnight this year?___
A. 24 percent .
B. 37 percent .
C. 9.5 percent .
D. 23.5 percent .
【单选题】
Q4: What can we learn about the 15-year-old Jenny?___
A. She and her cousins went back home at midnight .
B. She liked the traditional 4 a.m. Black Friday.
C. She preferred midnight shopping to early morning shopping .
D. She and her cousins got up very early to buy discounted items .
【单选题】
Q1: Why did the woman decide to do a triathlon?___
A. Because she did it in college .
B. Because she wanted to be tough .
C. Because her sister did it and liked it .
D. Because her sister said it was good for her .
