[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f662w2VnfSI1UpAgJ7DcMBlcd6ACUQT-87R5C0AyUgcE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-11-23 17:52:07",167111425,[8,9,10,11],"电气设备的金属外壳直接接地,与变压器的中性点是否接地无关","电气设备的金属外壳与变压器的中性接地点引出的零线直接相连","变压器中性点不接地","变压器中性点接地",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},274,"21434374b1577b9ec048c8174d787e28","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F007c8beca4281177b49a9776e8998d95.jpg","智能环境控制技术（建筑设备监控系统\u002F建筑设备自动化）","fde1c17350ce474cb1090f0388e3d0f6","单选题","TN—C—S配电系统中N表示的含义是( )",[21,32,41,50,59,66,75,84,93,102],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],167111416,[25,26,27,28],"探测器区域","主机区域","报警点","防区","在报警系统中,可识别的最小单位称为","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],167111417,[36,37,38,39],"低压断路器","低压交流接触器","低压漏电保护器","低压电流继电器","低压电器中具有短路、过载、欠压保护的电器是",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],167111418,[45,46,47,48],"主要类别","工作原理","调整参数","工作方式","通电延时和断电延时是时间继电器的",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],167111419,[54,55,56,57],"常开触点","常闭触点","启动按钮","停止按钮","电气控制中,常用的自锁控制是将被控电器元件的( )与启动控制信号并联",{"answer":60,"createTime":5,"id":61,"options":62,"question":65,"source":30,"type":31},[],167111420,[63,64,54,55],"辅助触点","保护触点","在电气控制中,用两个被控电气元件各自的( )相互封锁对方被控电气元件的线圈得电,称为互锁控制",{"answer":67,"createTime":5,"id":68,"options":69,"question":74,"source":30,"type":31},[],167111421,[70,71,72,73],"全压","减压","分级","带载","交流异步电动机的丫\u002F△启动可以实现电动机的( )启动",{"answer":76,"createTime":5,"id":77,"options":78,"question":83,"source":30,"type":31},[],167111422,[79,80,81,82],"高液位","超高液位","超低液位","溢流液位","排污泵应在大楼内的污水池液位在( )时启动,低液位时关闭",{"answer":85,"createTime":5,"id":86,"options":87,"question":92,"source":30,"type":31},[],167111423,[88,89,90,91],"±5%","±10%","土15%","±20%","电动机在正常运行时允许的电压偏差是( )",{"answer":94,"createTime":5,"id":95,"options":96,"question":101,"source":30,"type":31},[],167111424,[97,98,99,100],"无电压","有电压","无负载","有负载","高压隔离开关的分断操作必须在( )的情况下进行",{"answer":103,"createTime":5,"id":6,"options":104,"question":19,"source":30,"type":31},[],[8,9,10,11]]