Other Skilled Trades Glazing 1 — Questions and Answers
Question 1: What is the purpose of a setting block in glass installation?
- Decorative accent for the frame
- To support glass weight and prevent direct frame contact (Correct answer)
- To seal around the perimeter of the glass
- To measure glass unit thickness
Correct answer: To support glass weight and prevent direct frame contact
Setting blocks support the weight of the glass and keep it from resting directly on the frame, reducing concentrated stress at the bottom edge.
Question 2: What tool is used to score glass for cutting?
- Tile wet saw
- Glass cutter with a carbide wheel (Correct answer)
- Circular saw with a fine blade
- Jigsaw with a glass blade
Correct answer: Glass cutter with a carbide wheel
A glass cutter with a carbide wheel scores the surface of the glass, creating a controlled fracture line that guides a clean break.
Question 3: Where is tempered glass required by US building codes?
- Heated garages and outbuildings
- Doors, windows near floors, shower enclosures, and other hazardous locations (Correct answer)
- Tinted office windows only
- Vehicle windshields only
Correct answer: Doors, windows near floors, shower enclosures, and other hazardous locations
Tempered glass is heat-treated safety glass required by codes in hazardous locations including doors, windows near floors, and shower enclosures because it breaks into small, less dangerous pieces.
Question 4: What minimum PPE is required when handling large glass sheets?
- Leather gloves only
- Cut-resistant gloves and safety glasses (Correct answer)
- No PPE required for glass work
- Safety glasses only
Correct answer: Cut-resistant gloves and safety glasses
Cut-resistant gloves and safety glasses are required when handling glass sheets to protect against lacerations and flying glass particles.
Question 5: What is the minimum required clearance between glass edges and the frame?
- No clearance is needed
- 1/16 inch
- 1/8 inch (Correct answer)
- 1/2 inch
Correct answer: 1/8 inch
A minimum 1/8 inch edge clearance is required around all sides to allow the glass to expand and contract without stressing the frame.
Question 6: What sealant is most commonly used around glass in wet areas?
- Acrylic caulk
- Silicone sealant (Correct answer)
- Latex sealant
- Plaster of Paris
Correct answer: Silicone sealant
Silicone sealant is the preferred choice in wet areas because it is flexible, waterproof, and bonds well to glass and most frame materials.
Other Skilled Trades Glazing 1
What is the purpose of a setting block in glass installation?