室内排水主管安装后均应作通球试验，通球球径不小于排水管径的三分之二，通球率达到( )为合格。A.85% B.90% C.95% D.l00%

作者: rantiku 人气: - 评论: 0

问题室内排水主管安装后均应作通球试验，通球球径不小于排水管径的三分之二，通球率达到( )为合格。

选项 A.85% B.90% C.95% D.l00%

答案 D

解析排水管道主立管及水平干管安装结束后均应作通球试验。通球球径不小于排水管径的2/3，通球率必须达到100%。需全部合格。

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