Cấp nước & Phân phốiCâu 11 / 360
A lawn sprinkler system has no chemical injection and no possibility of backpressure, only back-siphonage under continuous pressure. Which device is the appropriate minimum protection?
a.Air gap only
b.Atmospheric vacuum breaker (AVB)
c.Pressure vacuum breaker (PVB)
d.No protection is required
Giải thích
Under continuous pressure with only back-siphonage risk, a pressure vacuum breaker (PVB) is designed to remain under continuous pressure and protect against back-siphonage. An AVB cannot stay under continuous pressure, an air gap is impractical for a pressurized sprinkler line, and some protection is always required on an irrigation cross-connection.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §603.0Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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