[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fcG-a6uHaijFxJwYzCJM9A-cZX-fvtdoQQKjMnXV5Ex4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-05-23 23:41:35",190382432,[8,9,10,11],"⑷→⑶→⑴→⑵","⑴→⑵→⑶→⑷","⑵→⑶→⑷→⑴","⑴→⑷→⑵→⑶",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},62,"96aefdced11cc0687437f1ff39b24e57","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd4ceb085e7fb614315a0999b89440b7.jpg","电梯维修与保养","4bf71abd5db24400924cb530aad070bc","项目3测验","电梯检修工作中进入底坑正确的操作步骤是:( ):⑴打开底坑照明.⑵进入底坑工作.⑶验证底坑急停开关.⑷验证厅门门锁回路",[21,33,42,51,60,69,78,87,96,106],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-05-23 23:41:33",190382372,[26,27,28,29],"导向","曳引","重量平衡","轿厢","导轨、导靴和导轨架组成的系统称为( )系统","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],190382373,[37,38,39,40],"30","50","60","70","轿厢与对重间的最小距离为( )mm",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],190382374,[46,47,48,49],"安全回路有问题","门锁回路有问题","召唤回路有问题","制动器有问题","电梯只有慢车,没有快车,可能的原因是:( )",{"answer":52,"createTime":23,"id":53,"options":54,"question":59,"source":31,"type":32},[],190382375,[55,56,57,58],"强迫减速开关失效","终端限位开关失效","终端极限开关失效","平层感应器失效","电梯出现了超越行程终端位置的故障.现象一:电梯在到达顶层时没有减速;现象二:电梯未停车继续上行;现象三:电梯冲顶前某安全保护开关动作后停止运行.最终查明是某些开关失效,并发现强迫减速开关滚轮中心位置距离导轨侧面为150mm,请根据以上现象回答下列问题:⑴下列造成现象一的主要原因是( )",{"answer":61,"createTime":23,"id":62,"options":63,"question":68,"source":31,"type":32},[],190382376,[64,65,66,67],"1.5","2.5","3","3.5","导轨支架安装要求,每个导轨支架中间间距应小于或等于( )m",{"answer":70,"createTime":23,"id":71,"options":72,"question":77,"source":31,"type":32},[],190382377,[73,74,75,76],"50mm","30mm","40 mm","20mm","层门应具有自动迫紧的功能,当用150N人力作用于开门方向时,开门间隙应小于( )",{"answer":79,"createTime":23,"id":80,"options":81,"question":86,"source":31,"type":32},[],190382378,[82,83,84,85],"1\u002F4","1\u002F3","1\u002F2","2\u002F3","垂直滑动门层门开始关闭之前,轿门至少已关闭到( )",{"answer":88,"createTime":23,"id":89,"options":90,"question":95,"source":31,"type":32},[],190382379,[91,92,93,94],"铰链","弹簧","杠杆","电磁","层门自闭装置是防坠落保护的重要部件,有( )式和重锤式两种",{"answer":97,"createTime":23,"id":98,"options":99,"question":105,"source":31,"type":32},[],190382380,[100,101,102,103,104],"单独控制电梯","并联控制电梯","消防电梯","信号控制电梯","电梯处于司机操作状态","一幢楼有两台电梯,每个楼层都只有一个呼梯召唤按钮.故障现象是:①某个层站有时外召无显示,同时电梯也无法召梯;②有时电梯有运行箭头且自动关门,但不能启动电梯;③正常情况下电梯在没有人使用时应停在待命运行的层站,但在故障时两台电梯总在运行,且每次都运行到三楼后停下来开门,等待一会后电梯再关门继续运行.请分析此例并回答以下问题:⑴一幢楼有两台电梯,每个楼层都只有一个呼梯召唤按钮,这是因为这两台电梯是:( ). [单选]",{"answer":107,"createTime":108,"id":109,"options":110,"question":115,"source":31,"type":32},[],"2025-05-23 23:41:34",190382381,[111,112,113,114],"±30","±15","±10","±20","对于额定速度不大于6.0m\u002Fs的电力驱动曳引式电梯,在运行时电梯轿厢的平层保持精度宜在( )mm范围内"]