Journeyman Glazier Licensing Exam
100 Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A Instant Download Pdf
1. What is the primary purpose of glazing blocks (setting blocks) in window
installation?
A. To seal air leaks around the perimeter
B. To support and position the glass properly within the frame
C. To tint the glass for solar control
D. To increase the insulation value of the unit
Rationale: Glazing blocks are small support pieces placed beneath the glass
to distribute its weight evenly, prevent edge damage, and maintain proper
spacing within the frame. Without them, the glass may shift or crack under
uneven pressure.
2. Which type of glass is designed to break into small, relatively blunt
granular pieces when shattered?
A. Annealed glass
B. Wired glass
C. Tempered glass
D. Laminated glass
Rationale: Tempered glass is heat-treated to increase its strength and causes
it to break into small, blunt fragments instead of sharp shards. This safety
feature reduces injury risk and is required in many hazardous locations.
3. What tool is commonly used to score glass before cutting?
A. Putty knife
B. Glass cutter
,C. Tin snips
D. Caulking gun
Rationale: A glass cutter creates a controlled score line on the glass surface,
allowing the glazier to break the glass cleanly along the desired line. Proper
scoring is critical for precision cutting and minimizing waste.
4. Which personal protective equipment is most essential when handling
large glass panels?
A. Rubber boots
B. Welding shield
C. Cut-resistant gloves
D. Hearing protection
Rationale: Handling glass exposes workers to severe laceration hazards. Cut-
resistant gloves help protect the hands from sharp edges and accidental
breakage, making them a critical safety requirement for glaziers.
5. What is the purpose of a thermal break in aluminum framing systems?
A. To increase frame weight
B. To improve soundproofing only
C. To reduce heat transfer through the frame
D. To strengthen structural support
Rationale: Thermal breaks are insulating barriers placed between interior and
exterior aluminum sections to minimize conductive heat transfer. This
improves energy efficiency and reduces condensation problems.
6. Which sealant characteristic is most important for exterior glazing
applications?
A. Bright color
B. Flexibility and weather resistance
C. Rapid hardening only
D. Electrical conductivity
Rationale: Exterior glazing sealants must withstand temperature changes,
moisture, UV exposure, and movement between materials. Flexible, weather-
resistant sealants maintain a watertight seal over time.
, 7. When cutting annealed glass by hand, what is the primary purpose of
applying consistent pressure during scoring?
A. To heat the glass for easier breaking
B. To create a controlled fracture line through surface weakening
C. To polish the glass edge during scoring
D. To increase glass thickness along the score line
Rationale: Scoring weakens the surface tension along a precise line, allowing
controlled breakage when pressure is applied.
8. Which type of glass is designed to reduce injury risk by breaking into small,
relatively harmless fragments?
A. Laminated glass
B. Wired glass
C. Tempered glass
D. Annealed glass
Rationale: Tempered glass is heat-treated to increase strength and shatters
into small granular pieces to reduce injury risk.
9. What is the most likely consequence of insufficient edge clearance in glass
installation?
A. Improved insulation
B. Reduced visibility
C. Edge compression leading to breakage
D. Increased frame strength
Rationale: Insufficient clearance prevents thermal expansion, causing edge
stress and potential glass failure.
10. Which type of glass is composed of two layers bonded with an interlayer?
A. Tempered glass
B. Laminated glass
C. Float glass
D. Patterned glass
Rationale: Laminated glass consists of layers bonded with a plastic interlayer
for safety and sound reduction.
100 Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A Instant Download Pdf
1. What is the primary purpose of glazing blocks (setting blocks) in window
installation?
A. To seal air leaks around the perimeter
B. To support and position the glass properly within the frame
C. To tint the glass for solar control
D. To increase the insulation value of the unit
Rationale: Glazing blocks are small support pieces placed beneath the glass
to distribute its weight evenly, prevent edge damage, and maintain proper
spacing within the frame. Without them, the glass may shift or crack under
uneven pressure.
2. Which type of glass is designed to break into small, relatively blunt
granular pieces when shattered?
A. Annealed glass
B. Wired glass
C. Tempered glass
D. Laminated glass
Rationale: Tempered glass is heat-treated to increase its strength and causes
it to break into small, blunt fragments instead of sharp shards. This safety
feature reduces injury risk and is required in many hazardous locations.
3. What tool is commonly used to score glass before cutting?
A. Putty knife
B. Glass cutter
,C. Tin snips
D. Caulking gun
Rationale: A glass cutter creates a controlled score line on the glass surface,
allowing the glazier to break the glass cleanly along the desired line. Proper
scoring is critical for precision cutting and minimizing waste.
4. Which personal protective equipment is most essential when handling
large glass panels?
A. Rubber boots
B. Welding shield
C. Cut-resistant gloves
D. Hearing protection
Rationale: Handling glass exposes workers to severe laceration hazards. Cut-
resistant gloves help protect the hands from sharp edges and accidental
breakage, making them a critical safety requirement for glaziers.
5. What is the purpose of a thermal break in aluminum framing systems?
A. To increase frame weight
B. To improve soundproofing only
C. To reduce heat transfer through the frame
D. To strengthen structural support
Rationale: Thermal breaks are insulating barriers placed between interior and
exterior aluminum sections to minimize conductive heat transfer. This
improves energy efficiency and reduces condensation problems.
6. Which sealant characteristic is most important for exterior glazing
applications?
A. Bright color
B. Flexibility and weather resistance
C. Rapid hardening only
D. Electrical conductivity
Rationale: Exterior glazing sealants must withstand temperature changes,
moisture, UV exposure, and movement between materials. Flexible, weather-
resistant sealants maintain a watertight seal over time.
, 7. When cutting annealed glass by hand, what is the primary purpose of
applying consistent pressure during scoring?
A. To heat the glass for easier breaking
B. To create a controlled fracture line through surface weakening
C. To polish the glass edge during scoring
D. To increase glass thickness along the score line
Rationale: Scoring weakens the surface tension along a precise line, allowing
controlled breakage when pressure is applied.
8. Which type of glass is designed to reduce injury risk by breaking into small,
relatively harmless fragments?
A. Laminated glass
B. Wired glass
C. Tempered glass
D. Annealed glass
Rationale: Tempered glass is heat-treated to increase strength and shatters
into small granular pieces to reduce injury risk.
9. What is the most likely consequence of insufficient edge clearance in glass
installation?
A. Improved insulation
B. Reduced visibility
C. Edge compression leading to breakage
D. Increased frame strength
Rationale: Insufficient clearance prevents thermal expansion, causing edge
stress and potential glass failure.
10. Which type of glass is composed of two layers bonded with an interlayer?
A. Tempered glass
B. Laminated glass
C. Float glass
D. Patterned glass
Rationale: Laminated glass consists of layers bonded with a plastic interlayer
for safety and sound reduction.
