AZ L-62 Glazing Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. Which type of glass is most commonly used for exterior windows due
to its safety and durability?
A. Annealed glass
B. Tempered glass
C. Laminated glass
D. Float glass
Tempered glass is heat-treated to increase strength and shatter into
small, less dangerous pieces, making it ideal for exterior applications.
2. What is the primary purpose of a glazing bead?
A. To clean the glass
B. To allow airflow
C. To secure the glass in the frame
D. To insulate the glass
Glazing beads hold the glass in place within the frame and provide a
finished appearance.
3. Which glazing method is typically used for large storefront windows?
A. Butt glazing
B. Channel glazing
C. Point-supported glazing
D. Laminated glazing
Channel glazing uses metal or PVC channels to support large glass
panels, commonly in commercial storefronts.
4. When installing insulating glass units (IGUs), what must be ensured to
prevent condensation?
, A. Use only tempered glass
B. Install directly on concrete
C. Seal the edges properly
D. Use single-pane glass
Proper sealing of IGUs prevents moisture from entering the air space
between panes, reducing condensation risk.
5. Which type of glass is designed to stay in place if shattered?
A. Tempered glass
B. Laminated glass
C. Float glass
D. Wired glass
Laminated glass has a plastic interlayer that holds the fragments
together when broken.
6. What is the recommended minimum safety glass thickness for a
residential sliding glass door?
A. 1/8 inch
B. 3/16 inch
C. 1/4 inch
D. 3/8 inch
Building codes typically require at least 1/4 inch tempered glass for
sliding doors to meet safety standards.
7. Which tool is essential for cutting glass on-site?
A. Saw
B. Drill
C. Glass cutter
D. Chisel
A glass cutter scores the surface so the glass can be snapped cleanly
along the score line.
8. Which glazing component improves thermal insulation?
A. Glazing bead
B. Spacer bar
C. Low-E coating
D. Sealant
Low-emissivity (Low-E) coatings reflect infrared energy, reducing
heat transfer and improving insulation.
9. What type of sealant is commonly used to prevent water penetration
around exterior glass?
, A. Acrylic
B. Silicone
C. Epoxy
D. Polyurethane foam
Silicone sealants are flexible, weather-resistant, and adhere well to
glass and metal frames.
10. When measuring a window for replacement, which dimension is
most critical?
A. Depth of sill only
B. Width and height of the glass or frame
C. Thickness of wall
D. Paint color
Accurate width and height measurements ensure the replacement
glass or window fits properly.
11. Which type of glass reduces sound transmission most effectively?
A. Float glass
B. Tempered glass
C. Laminated glass
D. Wired glass
Laminated glass with interlayers absorbs sound vibrations, improving
acoustic insulation.
12. What is the function of a setting block in glazing?
A. Hold the frame straight
B. Support the weight of the glass
C. Seal the edges
D. Clean the glass
Setting blocks provide cushioning and support to distribute the glass
weight evenly within the frame.
13. Which safety precaution is required when cutting tempered glass?
A. Wear ear protection
B. Cut slowly with water
C. Do not cut tempered glass
D. Use a glass saw
Tempered glass cannot be cut after tempering; it will shatter if
attempted.
14. What is the primary advantage of double-glazed windows?
A. Easier to clean
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. Which type of glass is most commonly used for exterior windows due
to its safety and durability?
A. Annealed glass
B. Tempered glass
C. Laminated glass
D. Float glass
Tempered glass is heat-treated to increase strength and shatter into
small, less dangerous pieces, making it ideal for exterior applications.
2. What is the primary purpose of a glazing bead?
A. To clean the glass
B. To allow airflow
C. To secure the glass in the frame
D. To insulate the glass
Glazing beads hold the glass in place within the frame and provide a
finished appearance.
3. Which glazing method is typically used for large storefront windows?
A. Butt glazing
B. Channel glazing
C. Point-supported glazing
D. Laminated glazing
Channel glazing uses metal or PVC channels to support large glass
panels, commonly in commercial storefronts.
4. When installing insulating glass units (IGUs), what must be ensured to
prevent condensation?
, A. Use only tempered glass
B. Install directly on concrete
C. Seal the edges properly
D. Use single-pane glass
Proper sealing of IGUs prevents moisture from entering the air space
between panes, reducing condensation risk.
5. Which type of glass is designed to stay in place if shattered?
A. Tempered glass
B. Laminated glass
C. Float glass
D. Wired glass
Laminated glass has a plastic interlayer that holds the fragments
together when broken.
6. What is the recommended minimum safety glass thickness for a
residential sliding glass door?
A. 1/8 inch
B. 3/16 inch
C. 1/4 inch
D. 3/8 inch
Building codes typically require at least 1/4 inch tempered glass for
sliding doors to meet safety standards.
7. Which tool is essential for cutting glass on-site?
A. Saw
B. Drill
C. Glass cutter
D. Chisel
A glass cutter scores the surface so the glass can be snapped cleanly
along the score line.
8. Which glazing component improves thermal insulation?
A. Glazing bead
B. Spacer bar
C. Low-E coating
D. Sealant
Low-emissivity (Low-E) coatings reflect infrared energy, reducing
heat transfer and improving insulation.
9. What type of sealant is commonly used to prevent water penetration
around exterior glass?
, A. Acrylic
B. Silicone
C. Epoxy
D. Polyurethane foam
Silicone sealants are flexible, weather-resistant, and adhere well to
glass and metal frames.
10. When measuring a window for replacement, which dimension is
most critical?
A. Depth of sill only
B. Width and height of the glass or frame
C. Thickness of wall
D. Paint color
Accurate width and height measurements ensure the replacement
glass or window fits properly.
11. Which type of glass reduces sound transmission most effectively?
A. Float glass
B. Tempered glass
C. Laminated glass
D. Wired glass
Laminated glass with interlayers absorbs sound vibrations, improving
acoustic insulation.
12. What is the function of a setting block in glazing?
A. Hold the frame straight
B. Support the weight of the glass
C. Seal the edges
D. Clean the glass
Setting blocks provide cushioning and support to distribute the glass
weight evenly within the frame.
13. Which safety precaution is required when cutting tempered glass?
A. Wear ear protection
B. Cut slowly with water
C. Do not cut tempered glass
D. Use a glass saw
Tempered glass cannot be cut after tempering; it will shatter if
attempted.
14. What is the primary advantage of double-glazed windows?
A. Easier to clean
