CBD Materials & Techniques 2 — Questions and Answers
Question 1: Which grout type is most resistant to staining and moisture in a shower environment?
- Sanded grout
- Unsanded grout
- Epoxy grout (Correct answer)
- Portland cement grout
Correct answer: Epoxy grout
Epoxy grout is non-porous, making it highly resistant to stains and moisture without needing sealing.
Question 2: What is the recommended maximum tile size for a wet shower floor to maintain slip resistance?
- 4x4 inches
- 12x12 inches (Correct answer)
- 18x18 inches
- 24x24 inches
Correct answer: 12x12 inches
Tiles 12x12 inches or smaller are recommended for shower floors because more grout lines improve slip resistance.
Question 3: Which countertop material requires annual sealing to prevent staining in bathroom applications?
- Quartz
- Porcelain
- Natural granite (Correct answer)
- Solid surface
Correct answer: Natural granite
Natural granite is porous and requires periodic sealing to prevent moisture and stain penetration.
Question 4: What does the term 'back-buttering' refer to in tile installation?
- Applying adhesive to the wall substrate
- Applying mortar to the back of a tile before setting (Correct answer)
- Sealing grout joints from behind
- Waterproofing the substrate before tiling
Correct answer: Applying mortar to the back of a tile before setting
Back-buttering involves applying thin-set mortar to the back of the tile to improve bond and coverage.
Question 5: Which underlayment material is best suited as a tile substrate in wet bathroom areas?
- Oriented strand board (OSB)
- Standard drywall
- Cement backer board (Correct answer)
- Plywood alone
Correct answer: Cement backer board
Cement backer board is dimensionally stable and will not swell or deteriorate when exposed to moisture.
Question 6: What is the primary advantage of using a linear drain in a curbless shower design?
- It reduces tile cost
- It allows a single-slope floor pitch to one side (Correct answer)
- It eliminates the need for waterproofing
- It requires less installation time
Correct answer: It allows a single-slope floor pitch to one side
A linear drain requires only a single-direction slope, simplifying large-format tile installation in curbless showers.
Question 7: Which type of valve cartridge is considered the most durable and lowest maintenance for shower faucets?
- Ball valve
- Compression valve
- Ceramic disc cartridge (Correct answer)
- Rubber washer valve
Correct answer: Ceramic disc cartridge
Ceramic disc cartridges are highly durable, drip-resistant, and require very little maintenance over their lifespan.
CBD Materials & Techniques 2
Which grout type is most resistant to staining and moisture in a shower environment?