1.What is the maximum lead content allowed in potable water system solder?
1.饮用水系统焊料中允许的最大铅含量是多少？
2.What seals a pipe penetrating the roof?
2.什么可以密封穿过屋顶的管道？
3.What factors affect water supply line size?
3.哪些因素影响供水管道尺寸？
4.Why are vents in plumbing systems important?
4.为什么管道系统中的通风口很重要？
5.What is the maximum length of a 2” trap arm?
5.2 英寸存水弯臂的最大长度是多少？
6.Which pipe is unsuitable for industrial wastes?
6.哪种管道不适合排放工业废水？
7.What water supply is used for a water closet (toilet)?
7.抽水马桶使用什么水源？
8.Where can a DWV pipe NOT discharge?
8.DWV 管道不能在哪些地方排放？
9.What is a “water closet”?
9.“Water Closet” 指什么？
10.In a commercial bathroom without a vent fan what’s the minimum window size?
10.在没有通风扇的商业浴室中，窗户的最小尺寸是多少？
