Core TradesCâu 197 / 700
What is the typical MINIMUM clearance to combustible materials for a single-wall metal vent connector on a fuel-burning appliance?
a.1 inch
b.3 inches
c.6 inches
d.12 inches
Giải thích
A single-wall metal vent connector typically requires at least 6 inches of clearance to combustibles because its outer surface runs hot. 1 and 3 inches are too close for single-wall pipe, and 12 inches is greater than the standard required clearance.
Trích dẫn luật: 2025 CA Mechanical Code, Chapter 8 (Vents and Connectors)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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