Core TradesCâu 192 / 700
When a check valve or pressure-reducing valve creates a 'closed' water system, a thermal expansion tank is required PRIMARILY to:
a.Absorb the pressure increase caused by water expanding as it is heated
b.Increase available hot-water volume
c.Filter sediment from the water heater
d.Reduce noise from the water heater burner
Giải thích
In a closed system, heated water cannot expand back toward the main, so an expansion tank absorbs the resulting pressure rise and protects the tank and relief valve. It does not add usable hot water, filter sediment, or quiet the burner.
Trích dẫn luật: 2025 CA Plumbing Code, Chapter 6 (Water Supply)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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