Nevada C-8 Glass and Glazing
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. In commercial storefront construction, which type of glass is most
commonly required by building codes for safety in doors and areas
subject to human impact?
A. Annealed glass
B. Patterned glass
C. Wired glass
D. Tempered glass
Rationale: Tempered glass is heat-treated to increase strength and cause it
to shatter into small blunt fragments rather than sharp shards, making it
the standard safety glazing material required in doors and other impact-
prone locations.
2. Laminated glass is primarily used in glazing systems because it:
A. Reflects heat better than insulated glass
B. Eliminates condensation
C. Remains intact when broken due to an interlayer
D. Requires no framing system
Rationale: Laminated glass contains a plastic interlayer that holds the
glass fragments together when broken, improving safety and security
while maintaining a barrier against penetration.
, 3. In an insulated glass unit (IGU), the primary purpose of the spacer
between panes is to:
A. Increase structural strength
B. Reduce glass thickness
C. Maintain separation and seal the air space between panes
D. Support glazing clips
Rationale: The spacer keeps the glass panes separated and helps seal the
air or gas-filled cavity, which improves thermal insulation and prevents
moisture infiltration.
4. Which glazing method involves applying glazing compound or sealant
directly against the glass and frame without mechanical fasteners?
A. Structural glazing
B. Face glazing
C. Pressure glazing
D. Butt glazing
Rationale: Face glazing involves applying glazing compound or sealant on
the exterior side of the glass against the frame, securing the glass without
mechanical retainers.
5. What is the primary function of setting blocks in a glazing installation?
A. Seal the perimeter of glass
B. Attach glazing stops
C. Support the glass and distribute weight within the frame
D. Prevent condensation
Rationale: Setting blocks are small support pieces placed at the bottom of
the glazing pocket to carry the weight of the glass and distribute loads
evenly within the frame.
6. Which type of sealant is commonly used in structural silicone glazing
systems?
A. Latex sealant
B. Asphaltic sealant
, C. Silicone sealant
D. Butyl sealant
Rationale: Structural silicone sealant provides strong adhesion and
flexibility, allowing it to securely bond glass to framing systems in
structural glazing applications.
7. When installing large glass panels, suction cups are used primarily to:
A. Clean the glass surface
B. Measure the glass thickness
C. Safely handle and lift glass sheets
D. Apply sealant
Rationale: Suction cups provide a secure grip on glass panels, enabling
workers to safely lift, move, and position large or heavy sheets of glass.
8. Which factor most directly affects thermal expansion in glass
installations?
A. Frame color
B. Wind pressure
C. Temperature changes
D. Glass thickness
Rationale: Temperature fluctuations cause glass to expand and contract,
which must be accommodated in glazing systems to prevent breakage.
9. Safety glazing is required in which of the following locations?
A. High clerestory windows
B. Shower doors and bathtub enclosures
C. Fixed windows above counters
D. Roof skylights over 20 feet high
Rationale: Building codes require safety glazing such as tempered or
laminated glass in hazardous locations like shower doors where human
impact is likely.
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. In commercial storefront construction, which type of glass is most
commonly required by building codes for safety in doors and areas
subject to human impact?
A. Annealed glass
B. Patterned glass
C. Wired glass
D. Tempered glass
Rationale: Tempered glass is heat-treated to increase strength and cause it
to shatter into small blunt fragments rather than sharp shards, making it
the standard safety glazing material required in doors and other impact-
prone locations.
2. Laminated glass is primarily used in glazing systems because it:
A. Reflects heat better than insulated glass
B. Eliminates condensation
C. Remains intact when broken due to an interlayer
D. Requires no framing system
Rationale: Laminated glass contains a plastic interlayer that holds the
glass fragments together when broken, improving safety and security
while maintaining a barrier against penetration.
, 3. In an insulated glass unit (IGU), the primary purpose of the spacer
between panes is to:
A. Increase structural strength
B. Reduce glass thickness
C. Maintain separation and seal the air space between panes
D. Support glazing clips
Rationale: The spacer keeps the glass panes separated and helps seal the
air or gas-filled cavity, which improves thermal insulation and prevents
moisture infiltration.
4. Which glazing method involves applying glazing compound or sealant
directly against the glass and frame without mechanical fasteners?
A. Structural glazing
B. Face glazing
C. Pressure glazing
D. Butt glazing
Rationale: Face glazing involves applying glazing compound or sealant on
the exterior side of the glass against the frame, securing the glass without
mechanical retainers.
5. What is the primary function of setting blocks in a glazing installation?
A. Seal the perimeter of glass
B. Attach glazing stops
C. Support the glass and distribute weight within the frame
D. Prevent condensation
Rationale: Setting blocks are small support pieces placed at the bottom of
the glazing pocket to carry the weight of the glass and distribute loads
evenly within the frame.
6. Which type of sealant is commonly used in structural silicone glazing
systems?
A. Latex sealant
B. Asphaltic sealant
, C. Silicone sealant
D. Butyl sealant
Rationale: Structural silicone sealant provides strong adhesion and
flexibility, allowing it to securely bond glass to framing systems in
structural glazing applications.
7. When installing large glass panels, suction cups are used primarily to:
A. Clean the glass surface
B. Measure the glass thickness
C. Safely handle and lift glass sheets
D. Apply sealant
Rationale: Suction cups provide a secure grip on glass panels, enabling
workers to safely lift, move, and position large or heavy sheets of glass.
8. Which factor most directly affects thermal expansion in glass
installations?
A. Frame color
B. Wind pressure
C. Temperature changes
D. Glass thickness
Rationale: Temperature fluctuations cause glass to expand and contract,
which must be accommodated in glazing systems to prevent breakage.
9. Safety glazing is required in which of the following locations?
A. High clerestory windows
B. Shower doors and bathtub enclosures
C. Fixed windows above counters
D. Roof skylights over 20 feet high
Rationale: Building codes require safety glazing such as tempered or
laminated glass in hazardous locations like shower doors where human
impact is likely.
