Cơ sở, Vệ sinh & Côn trùngCâu 302 / 320
A hose bibb (outdoor faucet) is used to attach a hose for cleaning. What device is commonly installed to prevent backflow at that connection?
a.A pressure gauge
b.A grease trap
c.A floor drain
d.A vacuum breaker (backflow prevention device)
Giải thích
A hose connection is a common backflow risk, so an approved backflow prevention device such as a vacuum breaker is installed to stop contaminated water from being siphoned back into the potable system. When a permanent air gap is not feasible, a mechanical device like a vacuum breaker is the accepted protection. Grease traps and drains serve entirely different plumbing functions.
Trích dẫn luật: FDA Food Code §5-203.14Luyện miễn phí toàn bộ 320 câu hỏi — không cần đăng ký.
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