[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fHJ2hwsus6vj5lPDx47czaXoH-ipOCzP_YG3d6ORdYIc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-04-22 14:02:53",348136769,[8,9,10,11],"12.5m, 25m","25m, 75m, 100m","12.5m, 25m, 100m","100m only",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","According to TB\u002FT 2344.1—2020, what is the standard length of 75kg\u002Fm rail",[18,29,32,41,50,55,62,71,80,90],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],348136768,[22,23,24,25],"Rail web","Rail head","Rail base","Rail joint","Which part of the rail cross-section is mainly responsible for bearing the wheel load","v1",0,{"answer":30,"createTime":5,"id":6,"options":31,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":27,"type":28},[],348136770,[36,37,38,39],"To reduce noise","To allow for thermal expansion","To increase joint strength","To simplify maintenance","What is the primary function of reserved rail gaps at rail joints",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":27,"type":28},[],348136771,[45,46,47,48],"High strength","Good toughness","Low wear resistance","Adequate rigidity","Which of the following is NOT a requirement for rails",{"answer":51,"createTime":5,"id":52,"options":53,"question":54,"source":27,"type":28},[],348136772,[22,23,24,25],"Which part of the rail cross-section is designed to withstand the vertical force from train wheels",{"answer":56,"createTime":5,"id":57,"options":58,"question":61,"source":27,"type":28},[],348136773,[10,9,59,60],"12.5m, 25m, 75m","75m, 100m, 125m","What is the standard length of 75kg\u002Fm rails according to TB\u002FT 2344.1—2020",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":27,"type":28},[],348136774,[66,67,68,69],"Guiding trains forward","Withstanding wheel pressure","Acting as a track circuit in electrified railways","Supporting the entire train body","Which of the following is NOT a function of rails in railway tracks",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":27,"type":28},[],348136775,[75,76,77,78],"To allow for thermal expansion of rails","To reduce noise during train operation","To increase the strength of rail joints","To facilitate rail replacement","What is the principle of reserving rail gaps at rail joints",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":27,"type":89},[],348136776,[84,85,86,87],"Fish plate","Rail bolt","Rail pad","Sleeper","Which of the following are components of a rail joint",1,{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":27,"type":89},[],348136777,[94,95,96,97],"Guiding train movement","Bearing wheel loads","Acting as track circuit in electrified railways","Supporting sleepers","What are the functions of rails in railway tracks"]