【多选题】【消耗次数:1】
下列说法正确的是?
道岔辙叉角越大,道岔曲线半径和长度越小,车辆运行稳定性差。
道岔辙叉角越小,道岔曲线半径和长度越大,车辆运行稳定性好。
道岔辙叉角越大,道岔曲线半径和长度越大,车辆运行稳定性好。
道岔辙叉角越小,道岔曲线半径和长度越小,车辆运行稳定性差
参考答案:
复制
纠错
相关题目
【判断题】 、双道起坡是在斜面上布置两个道岔(甩车道岔、分车道岔)形成双轨线路(斜面上形成),空、重车分别设置竖曲线。落平后的双轨存车线长度约2~3钩的串车长度,再接单开道岔联接点,变为单轨。
①  正确
②  错误
【判断题】 道岔的类型按其分岔型式可分成单开道岔、对称道岔和渡线道岔三大类型。
①  正确
②  错误
【判断题】 同步发电机并网运行,短路比数值越小,静态稳定性越高。
①  正确
②  错误
【单选题】 提高压杆稳定性,应尽量()惯性半径。
①  增加
②  减少
③  不变
【判断题】 电机在调速时,静差率越大,相对稳定性越好。
①  正确
②  错误
【判断题】 侧向力系数越大,侧向稳定性越高。
①  正确
②  错误
【判断题】 压杆的柔度越大,压杆的稳定性越差。()
①  正确
②  错误
【判断题】 单开道岔平行线路联接计算中道岔曲轨与平面曲线连接处的直线段C可小于零。
①  正确
②  错误
【单选题】 刚度和稳定性()
①  只与材料的力学性质有关
②  只与构件的形状尺寸有关
③  与二者都有关
④  与二者都无关.
【判断题】 双道起坡(道岔-道岔系统)二次回转方式适用于:围岩条件差,提升量大的采区车场。
①  正确
②  错误
【判断题】 四轮转向的应用,提高汽车转向操纵稳定性的同时,能显著缩短转弯半径,提高车辆弯道通过性能。()
①  正确
②  错误
随机题目
【单选题】 Train services are now back to ____after last week’s strike.?
①  ordinary ?
②  usual ?
③  normal ?
④  natural?
【单选题】 I thought I knew the way, but ____I got lost.
①  somehow
②  somewhat
③  anyhow
④  anyway
【单选题】 The ____ of the trees grew longer as the afternoon went on. ?
①  images ?
②  pictures ?
③  photos ?
④  shadows ?
【单选题】 The British people and the American people not only speak the same language but ____ a lot of special customs as well.
①  share
②  spare
③  hold
④  carry
【单选题】 “Are you ready for your paper?” “Not yet. I need___ to read through it.”
①  other three minutes
②  another three minutes
③  three other minutes
④  more three minutes
【单选题】 ____ to speak when the audience interrupted him.
①  Hardly had he begun
②  No sooner had he begun
③  Not until began
④  Scarcely did he begin
【单选题】 13. When I was a teenager, my bedroom was always ____; as an adult, though, my room is always neat..
①  tidy
②  orderly
③  mess
④  untidy
【单选题】 Women have to be more ____ than men if they want to get anywhere in the business world.
①  difficult
②  ambitious
③  traditional
④  conservative
【单选题】 24. The kind-hearted woman always tries to help others, but recently she has been ____kind and generous.
①  chiefly
②  specially
③  principally
④  especially
【单选题】 When the passenger woke up, he found himself ____in a hospital ward.
①  lie
②  lay
③  lying
④  lain