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【单选题】
临时换挂、加挂客车必须由配属单位保证达到《运用客车出库质量标准》和___。
A. 标记速度
B. 构造速度
C. 编组条件
D. 车构形式
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答案
C
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机车供电的空调客车,在列车始发前___连挂机车后须立即开启空调对车厢进行预冷、预热。
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在长大下坡道上,必须先看压力表,如压力表指针已由定压下降___时,不得再行使用紧急制动阀。
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大力发展安全检测技术,建立___的高度信息化的安全监控网络。
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25T型客车转臂与轴箱体组装后,须确保轴箱体上方定位面与转臂弹簧托盘下表面左、右间隙差不大于___。
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维修电器设备的人员,必须___,按规定穿戴好防护用品。
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滚动轴承内径尺寸公差的___。
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当公差带在零线下方时,其基本偏差为___。
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当一对相互啮合的渐开线齿轮的中心距发生少量改变后,其瞬时传动比将___。
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在铰链四杆机构中,能作整周旋转的连架杆称为___。
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移出剖面的图形画在视图之外,轮廓线用___绘制。
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用剖切面局部地剖开物体所得的剖视图,称为___。
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投影法分为中心投影法和___。
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两摩擦表面被一层液体完全隔开的摩擦,称为___。
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表示机器或部件中零件间的相对位置、连接方式、装配关系的图样称为___。
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三相四线制供电线路中,有关中线叙述正确的是___。
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下列放大器中,输入阻抗高、输出阻抗低的放大器是___。
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熔断器在低压配电系统和电力拖动系统中主要起___保护作用,因此熔断器属保护电器。
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25K型空调客车的空调控制柜(KLC40C-1T1)是通过电流继电器FA6、FA7对二台___进行过载保护的。
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三相半波可控整流电路带电阻性负载时,若触发脉冲加于自然换相点之前,则输出电压将___。
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由晶体管组成的共发射极、共基极、共集电极三种放大电路中,电压放大倍数最小的是___。
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已知理想变压器的一次绕组匝数为160匝,二次绕组匝数为40匝,则接在二次绕组上的1KΩ电阻等效到一次侧后,其阻值为___KΩ。
A. 4
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【单选题】
“关闭折角塞门发出列车或运行中关闭折角塞门”:列车前端越过出站信号机或___即算。为一般C类事故。
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25T型客车在列车管和___管路中设有压力传感器测试点,为行车安全监测装置提供压力信号。
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事故造成中断行车的、必要时铁路运输调度指挥部门应当调整___,减少事故影响
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车辆检修限度是车辆在检修时,对车辆零部件允许存在的损伤程度的规定,它是一种极为重要的___。
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