Core TradesCâu 25 / 700
For a 2-inch fixture drain, what is a common MAXIMUM developed length of the trap arm (from the trap weir to the vent)?
a.3 feet
b.5 feet
c.8 feet
d.12 feet
Giải thích
The plumbing code table generally allows a 2-inch trap arm up to about 5 feet of developed length before the vent, keeping the trap seal from being siphoned. 3 feet is overly restrictive for a 2-inch pipe, while 8 and 12 feet exceed the allowed length and risk self-siphonage.
Trích dẫn luật: 2025 CA Plumbing Code (CPC) Chapter 10 (Traps and Interceptors)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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