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VCB的作用是在需要的情况 下自动断开主变压器的供电。 .
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相关试题
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EGS的作用是将高压系统强制性 接地，以便车辆维护时人员的安全。 .
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CRH2A统型动车组二级检修时，检测受电弓与接触网接触压力时，上推力和下降力两个值之差 不应超过30 N。 .
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CRH2A统型动车组的转向架安 装了抗侧滚扭杆。 .
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CRH2A统型动车组采用了光纤 进行信息传输。 .
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BCU计算制动力的三要素是制 动级位指令、列车运行速度和载重。 .
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动车组必须专列回送，每列 编组不得超过16辆。 .
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CRH2A统型动车组三种风挡分 别是气密式外风挡、压缩形内风挡和防雪风挡等。.
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耐雪制动是为了防止由于闸片 和制动盘面之间的积雪而引起制动力降低。.
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CRH2A（统型）动车组关闭侧拉 门之后各车厢侧面的显示灯会熄灭，司机室驾驶台的关门显示灯会亮起 。.
【判断题】
CRH2A（统型）动车组在车体 外侧面上，设置了车侧显示灯、侧面目的地显示器、车号显示器。.
【判断题】
CRH2A（统型）动车组压紧 装置是通过油压动力缸来顶住侧门，将门和车体压紧密贴，保证车内的气密性。.
【判断题】
CRH2A（统型）动车组一级检修中基础制动检查制动闸片厚度为动车≥7mm，拖车≥7mm,外 观状态良好。.
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CRH2A（统型）动车组MON中 央装置系统提供 一般、诊断、检修模式等三个功能模式。.
【判断题】
CRH2A统型动车组车轮径860mm，最大磨耗时为790mm，车轮宽度为135 mm，车钩中心线 高度1000mm。.
【判断题】
CRH2A（统型）动车组 车内广播分为人工广播、语音自动广播、电台广播三种。.
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CRH2A（统型）动车组 电空转化阀将送来的压缩空气调整到与制动指令相对应的空气压力，并作为指令压力送给中继阀。.
【判断题】
动车组实行计划性预防修的检修体制，分为五级修程。 一、二级检修 为运用检修， 在动车所内进行； 三、四、五级检修 为高级检修。 .
【判断题】
CRH2A(统型)动车组 总定员613人。.
【判断题】
CRH2A(统型)动车组 司机室操纵台下搁脚台上安装有汽笛开关和 警惕脚踏 开关。.
【判断题】
CRH2A(统型)动车组 轴箱体前盖由铝合金制成。.
【判断题】
CRH2A动车组受电弓 软连线有三种：弓头软连线、肘接软连线、底架软连线。.
【判断题】
CRH2A(统型)动车组 高压隔离开关最小动作气压 350kPa。.
【判断题】
CRH2A(统型)动车组 真空集便系统污物箱装有三个液位开关，用于指示污物箱0%、20%、80%和100%四种液位。.
【判断题】
玻璃加热器电路的基本 单元由加热控制器、玻璃加热器及热传感器构成。.
【判断题】
CRH2A统型动车组标志 灯转换电路的基本单元由标志灯控制部、标志灯电阻器盘、前部标志灯及后部标志灯构成.
【判断题】
CRH2A统型动车组的制动系 统采用手动制动和由ATP控制的自动制动方式，动作方式采用电气再生制动和电气指令空气制动方式并用。.
【判断题】
CRH2A统型动车组检修标准车 轮直径之差：同一轮对≤1mm；同一转向架≤4mm；同一车厢≤4mm; 相邻车厢间≤40mm。.
【判断题】
CRH380A统型动 车组裂缝导致滑板漏气，受电弓无法正常升起。 .
【判断题】
CRH380A统型动车组受电弓检 查时,铝托架有直径大于2mm的电蚀孔须更换。 .
【判断题】
CRH380A统型动车组受电弓检查 时,两个滑板高度差大于2mm须更换。 .
【判断题】
CRH380A统型动车组受电弓 专项检查时,检查弓角无裂纹，表面磨损纵向宽度大于3mm时更换。 .
【判断题】
CRH380A统型动车组受电弓专项检查时,确认作业股道接触网已断电，接地杆已挂，确认作业 车组已放电，防溜、安全防护号志已设置，三层渡板放下.
【判断题】
CRH380A统型动车组受电弓专项 检查时,目视检查阻尼器：外观及安装状态良好，无漏油现象。.
【判断题】
CRH380A统型动车组受电弓专项检查时,目视检查升弓装置气囊;无裂纹、破损现象。当气囊存在龟裂深度达到或超过1.2mm， 或龟裂长度达到或超过25mm 的单 个龟裂，或可见内部的编织层时，更换气囊。.
【判断题】
CRH380A统型动车组受电弓在高 出车顶1.6m处测量，上推力和下降力两个值之差不应该超过20N。.
【判断题】
CRH380A统型动车组绝缘子检查，伞 群和绝缘子中间圆柱材料无变硬发脆或粉化现象。.
【判断题】
CRH380A统型动车组车顶作业完 毕后，在车顶确认隔离开关闭合，EGS断开到位。.
【判断题】
CRH380A统型动车组停放制 动功能检查时，1号作业人员在司机室投入主控，制动手柄置“运行”位。.
【判断题】
CRH380A统型动车组旋转停放 制动开关至“施加”位，通过MON屏确认停放制动施加，全列紧急制动施加。.
【判断题】
CRH380A统型动车组保压 试验，将BV手柄置于7N，保压5min，通过MON制动信息界面确认，MR压力下降值不得大于20kPa，BC压力不得有明显变化（下降值不得大于20kPa）。.
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