C33 Wallcovering Installation and Preparation 2

Question 1

What seam technique is used when two strips of wallcovering overlap and a straight cut is made through both layers simultaneously?

Accepted Answer

Double-cut seam

Answer

Butt seam

Answer

Wire seam

Answer

Overlap seam

Question 2

Which chemical solution is most commonly used to remove old vinyl wallcovering that has been applied directly over unprepared drywall?

Accepted Answer

Enzyme-based wallcovering remover diluted in warm water

Answer

Muriatic acid solution

Answer

Trisodium phosphate (TSP)

Answer

Bleach and water mixture

Question 3

When hanging wallcovering with a large pattern repeat, which method helps minimize waste?

Accepted Answer

Drop matching the strips by offsetting each strip by half the repeat

Answer

Cutting all strips to the same length before matching the pattern

Answer

Ignoring the pattern repeat and trimming at the ceiling

Answer

Using a random match pattern for all strips

Question 4

What is the correct sequence of steps when papering around an electrical outlet?

Accepted Answer

Hang the strip over the outlet, cut an X from corner to corner of the box, fold flaps behind the cover plate, and trim flush

Answer

Cut the strip around the outlet before hanging

Answer

Remove the outlet from the wall before hanging

Answer

Apply the paste directly to the outlet cover plate

Question 5

When hanging wallcovering on a surface previously painted with oil-based paint, what preparation step is critical?

Accepted Answer

Lightly sand the surface and apply a wallcovering primer-sealer

Answer

Apply the wallcovering adhesive directly over the paint without priming

Answer

Strip all paint down to bare drywall

Answer

Apply a coat of flat latex paint over the oil-based paint first

Question 6

Grasscloth and natural-fiber wallcoverings require which special seaming consideration not needed for vinyl?

Accepted Answer

Seams will always show and should be planned to fall in less visible locations

Answer

They must be double-cut seamed only

Answer

They require no adhesive and are applied with staples

Answer

They must be overlapped by at least 1/4 inch at every seam

Question 7

What is the recommended room temperature and humidity range for wallcovering installation?

Accepted Answer

65–75°F with 40–60% relative humidity

Answer

40–50°F with 20–30% relative humidity

Answer

80–90°F with 70–80% relative humidity

Answer

Any temperature as long as the surface is dry