【单选题】
摩擦阻力的大小主要取决于接头螺栓___和钢轨与夹板接触面之间的摩擦系数。
A. 拉应力
B. 拉力
C. 压应力
D. 压力
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相关试题
【单选题】
曲线某点的拨道量为6mm，其前后两点正矢的影响量为___。
A. 前后两点和为6mm
B. 前后两点各为-6mm
C. 前后两点和为3mm
D. 前后两点各为-3mm
【单选题】
下列四种路基基床变形属于基床外表变形的为___。
A. 道碴槽
B. 道碴锅
C. 道碴窝
D. 路基面翻浆
【单选题】
铺设无缝线路，___需要单独布置轨条。
A. 桥梁
B. 隧道
C. 道口
D. 小半径曲线
【单选题】
进行线路大修时，曲线半径___时，曲线不进行加宽。
A. ＜350m
B. ≥350m
C. ＜650m
D. ≥650m
【单选题】
曲线轨距加宽递减如无缓和曲线，则在___。
A. 直线上递减，递减率一般不大于1‰
B. 直线和圆曲线各递减一半，递减率不大于1‰
C. 圆曲线上递减，递减率一般不大于1‰
D. 直线上递减，递减率一般不大于2‰
【单选题】
当350＞R≥300m时，轨距加宽___。
A. 0mm
B. 5mm
C. 10mm
D. 15mm
【单选题】
某曲线半径为400m，则圆曲线正矢为___。
A. 80mm
B. 100mm
C. 125mm
D. 150mm
【单选题】
钢轨接头采用相错式时，其相错量不得小于___。
A. 2m
B. 2.5m
C. 3m
D. 3.5m
【单选题】
无缝线路固定区长度不得短于___。
A. 50m
B. 75m
C. 100m
D. 150m
【单选题】
长轨条的焊缝部位工作边用直尺测量，矢度不得大于___。
A. 0.3mm
B. 0.5mm
C. 1mm
D. 2mm
【单选题】
车站必须设在曲线时，半径应不小于___。
A. 500m
B. 600m
C. 800m
D. 1000m
【单选题】
无缝线路的铝热焊缝距轨枕边缘距离不得小于___。
A. 40mm
B. 50mm
C. 60mm
D. 70mm
【单选题】
已知直角三角形一直边长400mm、斜边长500mm，则另一直边长___。
A. 200mm
B. 300mm
C. 350mm
D. 400mm
【单选题】
60kg/m钢轨头部垂直磨耗大于___时，判定为重伤标准。
A. 8mm
B. 9mm
C. 10mm
D. 11mm
【单选题】
50kg/m钢轨头部垂直磨耗大于___时，判定为重伤标准。
A. 8mm
B. 9mm
C. 10mm
D. 11mm
【单选题】
正线、试车线60kg/m钢轨头部总磨耗大于___时，判定为轻伤标准。
A. 13mm
B. 14mm
C. 15mm
D. 16mm
【单选题】
正线、试车线50kg/m钢轨头部总磨耗大于___时，判定为轻伤标准。
A. 13mm
B. 14mm
C. 15mm
D. 16mm
【单选题】
车辆段线线60kg/m钢轨头部总磨耗大于___时，判定为轻伤标准。
A. 15mm
B. 16mm
C. 17mm
D. 18mm
【单选题】
车辆段线线50kg/m钢轨头部总磨耗大于___时，判定为轻伤标准。
A. 15mm
B. 16mm
C. 17mm
D. 18mm
【单选题】
车辆段线线50kg/m钢轨头部垂直磨耗大于___时，判定为轻伤标准。
A. 9mm
B. 10mm
C. 11mm
D. 12mm
【单选题】
正线及辅助线宜采用___钢轨。
A. 43kg/m
B. 50kg/m
C. 60kg/m
D. 75kg/m
【单选题】
车场线宜采用___钢轨。
A. 43kg/m
B. 50kg/m
C. 60kg/m
D. 75kg/m
【单选题】
在正线线路上，个别插入短轨不得短于___。
【单选题】
轨枕每千米配置根数___。
A. 1667根/km
B. 1680根/km
C. 1440根/km
D. 1620根/km
【单选题】
混凝土枕承轨槽压溃深度超过___达到严重伤损标准。
A. 1mm
B. 2mm
C. 0.5mm
D. 1.5mm
【单选题】
60kg/m钢轨头部垂直磨耗达到___为重伤标准。
A. 8mm
B. 9mm
C. 10mm
D. 11mm
【单选题】
钢轨顶面波浪形磨耗谷深超过___mm时为钢轨轻伤。
【单选题】
下列情况中，___应对轨缝进行调整。
A. 25m钢轨地段每千米总误差为75mm
B. 线路爬行量为15mm
C. 12.5m钢轨地段出现连续4个瞎缝
D. 12.5m钢轨地段出现连续2个轨缝大于构造轨缝
【单选题】
___kg/m钢轨头部侧面磨耗超过17mm时为重伤钢轨。
【单选题】
___不能防止线路爬行。
A. 增加轨撑
B. 拧紧螺栓
C. 夯实道床
D. 安装防爬设备
【单选题】
线路综合维修周期依据___确定。
A. 通过总重
B. 年通过总重
C. 机车轴重
D. 车辆轴重
【单选题】
调高垫板应垫在大胶垫之间，一般情况下，每处调高垫板总厚度不超过___。
A. 8mm
B. 10mm
C. 15mm
D. 20mm
【单选题】
为平衡列车在曲线运行时产生的___，需要在曲线段将外轨抬高，使车体内倾。
A. 向心力
B. 离心力
C. 向心速度
D. 离心速度
【单选题】
线路轨距超限或变化率不合要求，以及拨道后有个别碎弯，应进行___作业。
A. 起道
B. 改道
C. 拨道
D. 矫直钢轨
【单选题】
直线轨道对接接头允许相错量不得超过___。
A. 20mm
B. 30mm
C. 40mm
D. 50mm
【单选题】
下列___不是DTⅥ2－1型扣件调整轨距垫
A. 6号
B. 10号
C. 12号
D. 2号
【单选题】
4号线一期工程圆形隧道地段轨道结构高度为___mm。
A. 560
B. 740
C. 890
D. 500
【单选题】
4号线一期工程正线一般整体道床高程以轨枕承轨面高出道床面 ___ mm控制。
【单选题】
查照间隔及护背距离在心轨轨头宽___mm断面丈量。
A. 20～30
B. 10～30
C. 20～40
D. 30～50
【单选题】
4号线一期工程曲线加宽地段在直线递减，递减率不大于___。
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The destruction of these treasures was a loss for mankind that no amount of money could __________.___
A. stand up to
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【单选题】
The student was just about to ___________ the questions, when suddenly he found the answer.___
A. arrive at
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C. work out
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When there are small children around, it is necessary to put bottles of pills out of _________.___
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A. sight
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In Britain, the best season of the year is probably __________ spring.___
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Free medical treatment in this country covers sickness of mind as well as _________ sickness.___
A. normal
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C. average
D. ordinary
【单选题】
Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _________ to his confusion.___
A. extended
B. amounted
C. added
D. turned
【单选题】
A completely new situation will ___________ when the examination system comes into existence.___
A. arise
B. rise
C. raise
D. arouse
【单选题】
Cancer is second only __________ heart disease as a cause of death.___
A. of
B. to
C. with
D. from
【单选题】
The manager needs an assistant that he can _________ to take care of problems in his absence.___
A. count on
B. count in
C. count up
D. count out
【单选题】
We gave out a cheer when the red roof of the cottage came __________ view.___
A. from
B. in
C. before
D. into
【单选题】
They took ________ measures to prevent poisonous gases from escaping.___
A. fruitful
B. beneficial
C. valid
D. effective
【单选题】
Doing your homework is a sure way to improve your test scores, and this is especially true _______ it comes to classroom tests.___
A. when
B. since
C. before
D. after
【单选题】
In developing countries people are _______ into overcrowded cities in great numbers.___
A. breaking
B. filling
C. pouring
D. hurrying
【单选题】
There are other problems which I don't propose to ____________ at the moment.___
A. go into
B. go around
C. go for
D. go up
【单选题】
It is quite necessary for a qualified teacher to have good manners and _________ knowledge.___
A. extensive
B. expansive
C. intensive
D. expensive
【单选题】
I'm not sure whether I can gain any profit from the investment, so I can't make a(n) ______ promise to help you.___
A. exact
B. defined
C. definite
D. sure
【单选题】
The sports meet, originally due to be held last Friday, was finally ________ because of the bad weather.___
A. set off
B. broken off
C. worn off
D. called off
【单选题】
It has been revealed that some government leaders _______ their authority and position to get illegal profits for themselves.___
A. employ
B. take
C. abuse
D. overlook
【单选题】
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ________.___
A. intention
B. attempt
C. purpose
D. desire
【单选题】
The store had to _______ a number of clerks because sales were down.___
A. lay out
B. lay off
C. lay aside
D. lay down
【单选题】
All the students in this class passed the English exam ________ the exception of Li Ming.___
A. on
B. in
C. for
D. with
【单选题】
Writing is a slow process, requiring _______ thought, time, and effort.___
A. significant
B. considerable
C. enormous
D. numerous
【单选题】
Lightning is a ______ of electrical current from a cloud to the ground or from one cloud to another.___
A. rush
B. rainbow
C. rack
D. ribbon
【单选题】
I caught a ________ of the taxi before it disappeared around the corner of the street.___
A. vision
B. glimpse
C. look
D. scene
【单选题】
Students or teachers can participate in excursions to lovely beaches around the island at regular _________.___
A. gaps
B. rate
C. length
D. intervals
【单选题】
Physics is ________ to the science which was called natural philosophy in history.___
A. alike
B. equivalent
C. likely
D. uniform
【单选题】
The new appointment of our president _______ from the very beginning of next semester.___
A. takes effect
B. takes part
C. takes place
D. takes turns
