Core TradesCâu 142 / 700
In a long horizontal drainage line, cleanouts are generally required at intervals not exceeding approximately:
a.100 feet
b.25 feet
c.50 feet
d.200 feet
Giải thích
Cleanouts are required at intervals not exceeding 100 feet on horizontal drainage piping, plus at each aggregate change of direction exceeding a set total, so a drain snake can reach any blockage. 25 and 50 feet are more frequent than required, and 200 feet leaves portions unreachable for cleaning.
Trích dẫn luật: 2025 CA Plumbing Code §707.0Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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