Exam Questions And Correct Answers

CA D29 Paperhanging Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• Which type of wallpaper is most resistant to moisture and humidity?
• Non-woven
• Vinyl-coated
• Paper-backed fabric
• Grasscloth
• Vinyl-coated

Vinyl-coated wallpaper is water-resistant and suitable for humid areas such as bathrooms and kitchens.

• What is the standard width of most commercial wallpaper rolls?
• 18 inches
• 21 inches
• 24 inches
• 36 inches
• 21 inches

Most commercial wallpapers are 21 inches wide, which allows for easier pattern matching and coverage calculations.

• Which tool is essential for smoothing wallpaper after application?
• T-square
• Smoothing brush or plastic spatula
• Utility knife
• Staple gun
• Smoothing brush or plastic spatula

A smoothing tool removes air bubbles and ensures the wallpaper adheres properly to the wall. 1 / 3

4. Before applying wallpaper, the wall surface must be:

• Painted with oil-based paint
• Smooth, dry, and clean
• Sanded and left dusty
• Wet with water
• Smooth, dry, and clean

A clean and smooth surface ensures proper adhesion and prevents bubbling or peeling.

• Which adhesive is commonly used for traditional paper wallpaper?
• PVA glue
• Starch-based paste
• Epoxy resin
• Silicone adhesive
• Starch-based paste

Starch-based adhesives are ideal for paper wallpaper, providing strong adhesion without damaging the paper.

• What is the main purpose of double-cutting wallpaper seams?
• To make the paper longer
• To align patterns perfectly
• To remove excess adhesive
• To create overlapping edges
• To align patterns perfectly

Double-cutting ensures that patterns match seamlessly at the seams without gaps or overlaps.

• Which wallpaper type is easiest to remove?
• Vinyl-coated
• Pre-pasted
• Grasscloth
• Foil
• Pre-pasted

Pre-pasted wallpapers soften with water, making them easier to remove compared to vinyl or foil types.

• What is the typical repeat pattern of wallpaper?
• The distance before the design repeats
• The thickness of the paper
• The adhesive type
• The roll width 2 / 3

• The distance before the design repeats

Pattern repeat refers to the vertical distance at which the wallpaper design repeats, which is important for alignment.

• Which safety measure is important when using a stepladder for

wallpapering?

• Stand on the top step
• Lean ladder against wallpaper
• Keep three points of contact
• Use one hand for balance only
• Keep three points of contact

Maintaining three points of contact reduces the risk of falls while working at height.

• What is a common problem if wallpaper bubbles after drying?
• Incorrect wall color
• Adhesive applied too thickly or unevenly
• Roll width too small
• Use of pre-pasted wallpaper
• Adhesive applied too thickly or unevenly

Excess or uneven adhesive can trap air, leading to bubbling as the wallpaper dries.

• Which wall surface is unsuitable for traditional wallpaper

application?

• Drywall
• Masonry
• Smooth plaster
• Primed wood paneling
• Masonry

Rough, porous masonry requires special preparation or liner paper before wallpapering.

• How should seams be treated after applying wallpaper?
• Left dry
• Burnished or lightly pressed
• Covered with paint
• Cut and overlapped
• Burnished or lightly pressed

Lightly pressing seams ensures adhesion and reduces visibility of edges.

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