Surface PreparationCâu 14 / 100
Why is it poor practice to paint over a wall contaminated with grease or oil?
a.It makes the paint dry too fast
b.The contaminant prevents adhesion, causing the paint to peel or fisheye
c.It permanently changes the paint color
d.It increases the film thickness needed
Giải thích
Grease and oil act as a bond-breaker, so paint cannot adhere and may crawl into 'fisheyes' or peel. Surfaces such as kitchen walls should be degreased with a suitable cleaner and rinsed before priming. Clean, dry, dull, and sound is the standard rule for a paint-ready surface.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Bare ferrous (iron/steel) metal should be primed with what type of primer to prevent corrosion?
- What is the purpose of a primer/sealer on new, unpainted drywall?
- Loose, flaking paint on old siding should be handled how before recoating?
- New galvanized (zinc-coated) steel often needs what preparation before painting to avoid adhesion failure?
- When patching a larger hole in drywall, why is joint compound often applied in multiple thin coats rather than one thick coat?
- What is the main reason to remove dust after sanding and before painting?
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