Finish TradesCâu 292 / 700
In a three-coat plaster system over metal lath, the FIRST (base) coat pushed through and keyed behind the lath is called the:
a.Finish coat
b.Brown coat
c.Skim coat
d.Scratch coat
Giải thích
The first coat is the scratch coat, which keys through the metal lath and is scratched to form a mechanical bond for the next (brown) coat, followed by the finish coat. The brown coat is second, the finish coat is last, and skim coat is a thin drywall term, not a plaster base coat.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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