相关试题
【单选题】
碱性蓄电池电解液液面须高出极板___毫米。
A. 40-50
B. 50-60
C. 60-70
D. 70-80
【单选题】
客车电扇检修后的火花等级不大于___级。
【单选题】
YW22型48V电压制配电盘终夜保险丝容量是___
【单选题】
蓄电池施行准放电时以___小时率放电。
【单选题】
配线绝缘电阻值单车母车应符合___MG.
A. 0.05
B. 0.02
C. 0.1
D. 0.2
【单选题】
KP—2B控制箱的主要控制元件是___
A. 晶闸管
B. 电容
C. 三极管
D. 电阻
【单选题】
TKZW–1T型轴报器的定点报警温度为___度
A. 85±1
B. 90±1
C. 95±1
D. 96±1
【单选题】
BY_2型逆变器的工作电压为直流___V
A. 25-30
B. 30-35
C. 36-40
D. 44-65
【单选题】
车辆正常运行时,KP-2A型供电装置电池电流正常值是___
【单选题】
电风扇段修后,温升试验时其测量绝缘电阻不得小于___MG
A. 0.2
B. 0.5
C. 1
D. 1.5
【单选题】
低压电器一般是指工作在交流___V以下电路的电器.
A. 400
B. 380
C. 220
D. 1000
【单选题】
下列属于低压控制电器的是___
A. 熔断器
B. 刀开关
C. 自动开关
D. 接触器
【单选题】
下列属于低压配电电器的是___
A. 手控开关
B. 自动开关
C. 主电器
D. 继电器
【单选题】
段修后,蓄电池容量应为额定容量的___以上.
A. 60%
B. 70%
C. 80%
D. 90%
【单选题】
客车车体配线段修后,墙板引出线的支线截换时须留有___mm以上的余量.
A. 80
B. 100
C. 150
D. 200
【单选题】
蓄电池充电时，电解液温度不超过___摄氏度。
【单选题】
KT01客车按键式轴温报警器，若显示“NE-0”或“NE-1”分别表示第N号轴数的温度传感器出现___状态
A. 正常和开路
B. 正常和短路
C. 短路和开路
D. 开路和短路
【单选题】
空调装置无冷气或冷气不足，这是与制冷系统有关的问题，应检查___系统。
【单选题】
一个空调系统的新风量Gw不应小于总送风量的___
【单选题】
我国客车车下布线主干线、支线连接均应采用分线盒内___联接型式。
A. 单线制
B. 双线制
C. 单、双线混合制
D. 视具体车型而定
【单选题】
(76248)TKZW-1T型轴报器的定点报警温度为___℃。
A. 85±5
B. 90±2
C. 95±5
D. 100±5
【单选题】
氯磺化聚乙烯线型号为___。
A. DCYHR
B. DCXVF
C. DCXHF
D. BBXR
【单选题】
接触器中灭弧装置的作用是___
A. 防止触头烧毛或熔焊
B. 加快触头分断速度
C. 减小触头电流
D. 减小电弧引起的反电势
【单选题】
客室加热器罩的表面温度不得超过___℃。
【单选题】
客车使用的轴温报警器主要有三种类型，其关键区别在于___不同。
A. 报警方式
B. 结构
C. 轴温传感器
D. 温度显示范围
【单选题】
YZ22型客车两端设有电气连接器，其安装规定为___
A. 1、4位为插座，2、3位为插头
B. 1、3位为插座，2、4位为插头
C. 1、2位为插座，3、4位为插头
D. 不能确定
【单选题】
轴温报警器轴位线路短路时，光屏温度显示为___。
【单选题】
(76282)轴温报警器轴位线路开路时，光屏温度显示为___
【单选题】
正目前,客车常用的车钩有___两种.
A. 1号、15号
B. 2号、13号
C. 1号、15G型
D. 13号、15号
【单选题】
需在待发列车后部存放机车、车辆、动车及重型轨道车时（包括在列车尾部摘下的车辆），对有列检作业的列车，应距列车___m及其以上。
【单选题】
护信号，移动式防护信号的设置地点，应控制在距离停留车辆___之间。
A. 10—20m
B. 20—30m
C. 15—20m
D. 25—30m
【单选题】
在超过___坡道的线路上停留车辆时，须采取拧紧两端车辆人力制动机并以铁鞋牢靠固定。
A. 1.5‰
B. 2.5‰
C. 3.5‰
D. 4.5‰
【单选题】
康尼塞拉门有电、有气时用三角钥匙操作装置不能打开和关闭车门的原因是___
A. 机械故障
B. 微动开关损坏
C. 内操作损坏
D. 外操作损坏
【单选题】
塞拉门内操作能开锁而处操作不能开锁的原因是___
A. 外操作上牵拉钢丝绳的夹头过紧
B. 内操作上牵拉钢丝绳的夹头松动
C. 外操作上牵拉钢丝绳的夹头松动
D. 内操作上牵拉钢丝绳的夹头过紧
【单选题】
由铁路电气化接触网供电的空调客车，照明和通风机电机采用___供电
A. 交流220V
B. 直流110V
C. 交流110V
D. 蓄电池
【单选题】
25K型快速客车车体钢结构系___筒体承载结构。
A. 有中梁簿壁
B. 无中梁簿壁
C. 有中梁厚壁
D. 无中梁厚壁
【单选题】
当接触器切断电路电压超过（）V，电流超过80~100mA时，通常会产生“电弧”___
A. 3~4
B. 5~6
C. 8~9
D. 10~12
【填空题】
1.空气开关主要由触头系统、_、灭孤室、脱扣器等组成。___
【填空题】
几个电容器并联后的等效电容___其中任一个并联电容器的电容量
推荐试题
【单选题】
14. — Can he jump high?
— Yes, he ______. He is a good high jumper.
A. must B. need C. can D. shall
【单选题】
15. The shop _____ at 8:00 a．m．and it ________ for ten hours every day．
A. is open; has opened B. is opened; opens
C. opens; is open D. opened; opens
【单选题】
16. —Excuse me, may I use your bicycle? ______ is broken.
Certainly. But remember to return it before lunch.
A. Mine B. Me C. Myself D. I
【单选题】
17. Simon, what do I need to take for the hiking?
Youd better ________ more water than usual. Its hot today.
A. to take B. taking C. take D. took
【单选题】
18. Helen ______ to a language school when she was seven.
A. sent B. is sent C. will send D. was sent
【单选题】
19. — Is this park youve visited recently?
— Yes, it's the most beautiful one Ive ever visited before.
A. that B. the one C. which D. the one which
【单选题】
20. — Its difficult for the village children to cross the river for school.
— I think a bridge ________ over the river.
A. should be built B. is being built C. has been built D. was built
【单选题】
21. — Could you tell me when Mr. Li ________ in Huaibei?
— Sure．．When he ________, I’ll call you．
A. arrives; will arrive B. will arrive; will arrive
C. arrives; arrives D. will arrive; arrives
【单选题】
22.There is ________ 800-metre-long road behind ________ hospital．
A. an; an B. an; the C. a; a D. a; the
【单选题】
23. — Did you see a girl in yellow pass by just now?
— No, sir. I ________ a magazine.
A. read B. am reading C. was reading D. would read
【单选题】
24.In fact, my parents are not only kind to me, but also strict ________ me.
A. at B. to C. for D. with
【单选题】
25. The boy_____ a yellow sweater can_____ himself now．
A. wearing; dress B. putting on; wear C. put on; dress D. dressing;
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
【单选题】
( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
C．He realizes his love for the rose and he goes back to his planet．
D．He discovers interesting things such as a snake, other roses and a fox．
【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
A．the adult world B．the planet B -612
C．a rose and a fox D．the adventure of a young
【单选题】
( ) 29. When a baseball player hits the ball, he must ______ to get a point.
A. run to each base freely
B. touch the home plate first
C. touch all the bases with his hands
D. run to each base in order and touch it with his foot
【单选题】
( ) 30. When was the importance of touching all the bases shown?
A. Before the baseball rules made.
B. At the end of the 1974 baseball seasons.
C. At the start of the 1974 baseball seasons.
D. In the second week of 1974.
【单选题】
( ) 31. Who hit home run number 715?
A. Babe Ruth. B. Hank Aaron. C. Babe Ruth’s partner. D. Hank Aaron’s friend.
【单选题】
( ) 32. What does the expression “to touch all bases” mean?
A. To try your best to set a new record.
B. To get a chance to be the greatest hitter.
C. To do what is needed to finish an activity.
D. To solve the problems successfully.
【单选题】
( ) 33. The Chinese Yellow Sea Wetlands are in the _______ of China．
A．south B．east C．west D．north
【单选题】
( ) 34. Usually the weather in the wetlands is _______．
A．hot B．pleasant C．cold D．dry
【单选题】
( ) 35. The World Wetlands Day is on _______．
A．February 2 B．June 25 C．April 22 D．March 22
【单选题】
( ) 36. We must protect wetlands because _______．
A．they are home for wildlife B．they can prevent flood
C．they can offer food to the animals and birds D．all of the above
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
【单选题】
( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
C. irrigation and making electricity D. washing clothes
【单选题】
( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
C. chemicals and other materials D. people's building a dam across a river
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
C. Transportation D. Natural Resources
【单选题】
1.—Hello! This is Henry Speaking．I’d like to speak to your father．
—Sorry, he has Shanghai．
A. been in B. been to C. come to D. gone to
【单选题】
2. — It’s difficult for the village children to cross the river for school．
— I think a bridge ______ over the river．
A. was built B. is being built C. has been built D. should be built
【单选题】
3. —Where would you like to go, Jinan or Qufu?
— ．I only want to go to Qingdao．
A. Each B. Either C. Neither D. All
【单选题】
4. — The documentary A Bite Of China II is quite popular around China recently. How do you like it? — ______.
A. I think so B. Pretty good C. It’s my pleasure D. All right
【单选题】
5. There are three English-books on the shelf, but ______ of them is mine.
A. both B. neither C.all D. none
【单选题】
6. When the parents arrived at the hall, the students _______ their projects.
A. have finish B. finished C. had finished D. are finishing
【单选题】
7. This week, the _______ seems to change every day: one day is hot; the next day is cold.
A. time B. weather C. season D. way
【单选题】
8. He never does his work _______ Mary.
A. as careful as B. so careful as C. carefully as D. as carefully as
【单选题】
9. — Can he jump high?
— Yes, he ______. He is a good high jumper.
A. must B. need C. can D. shall
【单选题】
10. The shop _____ at 8:00 a．m．and it ________ for ten hours every day．
A. is open; has opened B. is opened; opens
C. opens; is open D. opened; opens
【单选题】
11. —Excuse me, may I use your bicycle? ______ is broken.
—Certainly. But remember to return it before lunch.
A. Mine B. Me C. Myself D. I
【单选题】
12. —Simon, what do I need to take for the hiking?
—You’d better ________ more water than usual. It’s hot today.
A. to take B. taking C. take D. took
【单选题】
13. Helen ______ to a language school when she was seven.
A. sent B. is sent C. will send D. was sent
