[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fXXyhTq3LbmXJza2XSqSG3xeeESqwaYItUdJsLiHUjCQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-01-15 11:55:52",312774686,[8,9,10,11],"220V","230V","380V","400V",{"courseId":13,"courseImg":14,"courseName":15},"3114ad122cac0712f122955f368ef7c4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbb062ff6068e05b64e1dc4486da29b2a.jpg","电机及拖动基础","某单相变压器的额定电压为10000\u002F230V接在10000V的交流电源上向一电感性负载供电,电压调整率为0.03,变压器空载时的二次电压为()",[18,29,38,47,56,59,68,77,86,95],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],312774682,[22,23,24,25],"电枢绕组","换向极","基座","主磁极","以下属于直流电机转子部分的是()","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],312774683,[33,34,35,36],"磁畴相互摩擦而产生的消耗","涡流在铁心引起的损耗","绕组的阻抗产生的损耗","漏磁通产生的损耗","涡流损耗是由()产生的",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],312774684,[42,43,44,45],"Tem=TN","Tem=0.81TN","Tem=0.9TN","Tem=0.955TN","一台三相异步电动机拖动额定转矩负载运行时,若电源电压下降10%,这时电动机的电磁转矩()",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],312774685,[51,52,53,54],"交轴电枢反应","直轴增磁电枢反应","直轴去磁电枢反应","既有交轴电枢反应,又有直轴去磁电枢反应","同步发电机当其电枢电流超前空载电势90o运行时,电枢反应为()",{"answer":57,"createTime":5,"id":6,"options":58,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],312774687,[63,64,65,66],"电压的大小","磁通的方向","转速的大小","电枢电流的大小","改变直流电动机励磁电流方向的实质是改变()",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":27,"type":28},[],312774688,[72,73,74,75],"1.73","2","3","1.5","笼型三相感应电动机在采用星-角转换启动时,电网供给的启动电流比直接启动时降低了()倍",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":27,"type":28},[],312774689,[81,82,83,84],"倒拉反接制动运行机制","回馈发电制动运行","电源反接制动运行","A、B两种方法都行","额定转速为1420r\u002Fmin的他励直流电动机,要求以350r\u002Fmin的速度下放重物,应采取的方法是()",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":27,"type":28},[],312774690,[90,91,92,93],"阻性负载输出端电压U2增大","感性负载输出端电压U2增大","容性负载输出端电压U2增大","以上均不正确","当变压器的负载增加后,以下哪个解释是正确的()",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":27,"type":28},[],312774691,[99,100,101,102],"输入功率不变","输出功率不变","总损耗功率不变","电磁功率不变","直流电动机在串电阻调速过程中,若负载转矩不变,则()"]