Lập kế hoạch & Dự toánCâu 308 / 360
A plan symbol shows a circle with the letters "CO" next to a drain line at grade. What does this indicate?
a.A cleanout at that location
b.A carbon-monoxide alarm
c.A cold-only faucet
d.A concrete opening
Giải thích
"CO" on a drainage line marks a cleanout, an access fitting for rodding the line. Recognizing the cleanout symbol lets you count them for the takeoff and verify code-required locations. Confirm the abbreviation on the plan legend, since "CO" can mean different things on other discipline drawings.
Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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