[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fMReV8PepWipSW5vEZkczP2wxZMkYHqfurpFsITelpXI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2026-01-13 20:38:58",311611704,[8,9,10,11],"仅表面贴装元件 PCB","通孔插装与混装电路板","高密度微型 PCB","柔性电路板",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","波峰焊主要适用于以下哪种电路板的批量焊接( )",[18,23,32,41,50,59,68,77,86,95],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],311611705,[27,28,29,30],"冷却系统","氮气系统","助焊剂回收系统","抽风系统","回流焊中,能有效避免无铅焊膏氧化的系统是( )",{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":21,"type":22},[],311611706,[36,37,38,39],"降低焊料熔点","去除氧化层防止虚焊","增加焊料流动性","清洁 PCB 表面油污","波峰焊工艺中,喷涂助焊剂的核心作用是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":21,"type":22},[],311611707,[45,46,47,48],"从 230℃降至 75℃以下","自然冷却","从 230℃降至 100℃以下","缓慢降温避免应力","回流焊冷却区的合理降温要求是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":21,"type":22},[],311611708,[54,55,56,57],"80-120℃","90-130℃","120-150℃","183-230℃","波峰焊中,预热温度一般控制在哪个范围( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":21,"type":22},[],311611709,[63,64,65,66],"170℃","183℃","200℃","230℃","波峰焊常用的共晶焊料 Sn63\u002FPb37 的熔点是( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":21,"type":22},[],311611710,[72,73,74,75],"去除 PCB 表面污染物","使焊膏重新熔化实现元器件与 PCB 可靠连接","精准放置元器件","切割多余引脚","回流焊的核心功能是( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":21,"type":22},[],311611711,[81,82,83,84],"恒温区","预热区","回流区","冷却区","回流焊温度曲线中,用于去除焊膏中溶剂和水分的温区是( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":21,"type":22},[],311611712,[90,91,92,93],"速度越快,焊接质量越好","速度越慢,焊接质量越好","速度与焊接质量无关","速度需要根据焊膏类型和峰值温度调整","回流焊炉的传送带速度通常如何影响焊接质量( )",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":21,"type":22},[],311611713,[99,100,101,102],"焊炉开始升温时的温度","焊膏熔化时的最高温度","焊炉冷却结束时的温度","焊炉预热阶段的温度","在 SMT 回流焊工艺中,"峰值温度"指的是什么( )"]