单选题:离线封闭母线与设备连接时,为了便于拆卸,连接处一般采用螺栓连接,且接触面需镀银处理,请问当导体额定电流大于下列哪项数值时 题目分类:发输变电专业知识 题目类型:单选题 查看权限:VIP 题目内容: 离线封闭母线与设备连接时,为了便于拆卸,连接处一般采用螺栓连接,且接触面需镀银处理,请问当导体额定电流大于下列哪项数值时,应采用非磁性材料紧固件?( ) A.1000A B.2000A C.2500A D.3000A 参考答案: 答案解析:
某220kV变电站内设有两台主变压器,变压器铁芯为冷轧硅钢片,过电压一般不超过下列哪个数值时,可不采取保护措施?( ) 某220kV变电站内设有两台主变压器,变压器铁芯为冷轧硅钢片,过电压一般不超过下列哪个数值时,可不采取保护措施?( )A.411.5kV B.291.0kV 分类:发输变电专业知识 题型:单选题 查看答案
Please put Mary' s things back where you found them ________ Please put Mary' s things back where you found them __________ she won' t know 分类:发输变电专业知识 题型:单选题 查看答案
What is the best title for the passage? What is the best title for the passage?A.Unforgettable Experiences B.Remarkable 分类:发输变电专业知识 题型:单选题 查看答案
--Tommy, do you know if Frank __________ to the theatre with --Tommy, do you know if Frank __________ to the theatre with us this Sunday if i 分类:发输变电专业知识 题型:单选题 查看答案