CT Glazing Contractor Exam Questions and
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
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1. Which type of glass is designed to break into relatively small, less-
sharp fragments when fractured?
A. Annealed glass
B. Wired glass
C. Tempered glass
D. Laminated glass
Answer: C. Tempered glass
Rationale: Tempered glass is heat-treated to increase its strength and
alter its fracture pattern. When it breaks, it generally disintegrates
into small granular pieces rather than producing large, sharp shards.
This makes it particularly useful in locations where human impact is a
concern.
, 2. What is the primary purpose of laminated glass?
A. To increase thermal conductivity
B. To keep broken glass together
C. To eliminate all glass deflection
D. To reduce the weight of a window
Answer: B. To keep broken glass together
Rationale: Laminated glass consists of two or more glass plies bonded
to an interlayer. When the glass breaks, the interlayer helps retain the
fragments and can maintain a barrier after impact. Laminated glass is
therefore commonly used where safety, security, or impact resistance
is important.
3. Which material is commonly used as the interlayer in laminated
architectural glass?
A. Plywood
B. Polyvinyl butyral (PVB)
C. Portland cement
D. Neoprene foam only
Answer: B. Polyvinyl butyral (PVB)
Rationale: PVB is a widely used glazing interlayer because it bonds
glass layers together and helps retain broken fragments. Other
,specialized interlayers are also available, but PVB is a common
material in architectural laminated glazing.
4. What is annealed glass?
A. Glass that has been heat-treated to increase strength
B. Glass that contains a metal mesh
C. Standard glass that has been slowly cooled during manufacturing
D. Glass consisting of two panes separated by an air space
Answer: C. Standard glass that has been slowly cooled during
manufacturing
Rationale: Annealing is a controlled cooling process used during glass
manufacture to relieve internal stresses. Annealed glass is easier to
cut and fabricate than tempered glass, but when broken it typically
produces larger, sharper shards.
5. Why must tempered glass generally be cut and drilled before
tempering?
A. Tempering makes the glass opaque
B. Tempering substantially changes the glass structure and makes
subsequent cutting likely to cause breakage
C. Tempering removes all surface coatings
D. Tempering makes the glass flexible
, Answer: B. Tempering substantially changes the glass structure and
makes subsequent cutting likely to cause breakage
Rationale: Tempering introduces controlled stresses into the glass.
Cutting, drilling, or major edge alteration afterward can disrupt those
stresses and cause the entire piece to fracture. Fabrication operations
normally need to be completed before tempering.
6. What is the primary function of a glazing gasket?
A. To sharpen the glass edge
B. To provide a resilient seal between the glass and framing system
C. To increase glass thickness
D. To replace all structural framing
Answer: B. To provide a resilient seal between the glass and framing
system
Rationale: Glazing gaskets provide compression and sealing between
the glass and the frame. They help accommodate movement, reduce
air and water infiltration, and protect the glass edge from direct
contact with the frame.
7. Which condition is most likely to cause glass breakage from
thermal stress?
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
1. Which type of glass is designed to break into relatively small, less-
sharp fragments when fractured?
A. Annealed glass
B. Wired glass
C. Tempered glass
D. Laminated glass
Answer: C. Tempered glass
Rationale: Tempered glass is heat-treated to increase its strength and
alter its fracture pattern. When it breaks, it generally disintegrates
into small granular pieces rather than producing large, sharp shards.
This makes it particularly useful in locations where human impact is a
concern.
, 2. What is the primary purpose of laminated glass?
A. To increase thermal conductivity
B. To keep broken glass together
C. To eliminate all glass deflection
D. To reduce the weight of a window
Answer: B. To keep broken glass together
Rationale: Laminated glass consists of two or more glass plies bonded
to an interlayer. When the glass breaks, the interlayer helps retain the
fragments and can maintain a barrier after impact. Laminated glass is
therefore commonly used where safety, security, or impact resistance
is important.
3. Which material is commonly used as the interlayer in laminated
architectural glass?
A. Plywood
B. Polyvinyl butyral (PVB)
C. Portland cement
D. Neoprene foam only
Answer: B. Polyvinyl butyral (PVB)
Rationale: PVB is a widely used glazing interlayer because it bonds
glass layers together and helps retain broken fragments. Other
,specialized interlayers are also available, but PVB is a common
material in architectural laminated glazing.
4. What is annealed glass?
A. Glass that has been heat-treated to increase strength
B. Glass that contains a metal mesh
C. Standard glass that has been slowly cooled during manufacturing
D. Glass consisting of two panes separated by an air space
Answer: C. Standard glass that has been slowly cooled during
manufacturing
Rationale: Annealing is a controlled cooling process used during glass
manufacture to relieve internal stresses. Annealed glass is easier to
cut and fabricate than tempered glass, but when broken it typically
produces larger, sharper shards.
5. Why must tempered glass generally be cut and drilled before
tempering?
A. Tempering makes the glass opaque
B. Tempering substantially changes the glass structure and makes
subsequent cutting likely to cause breakage
C. Tempering removes all surface coatings
D. Tempering makes the glass flexible
, Answer: B. Tempering substantially changes the glass structure and
makes subsequent cutting likely to cause breakage
Rationale: Tempering introduces controlled stresses into the glass.
Cutting, drilling, or major edge alteration afterward can disrupt those
stresses and cause the entire piece to fracture. Fabrication operations
normally need to be completed before tempering.
6. What is the primary function of a glazing gasket?
A. To sharpen the glass edge
B. To provide a resilient seal between the glass and framing system
C. To increase glass thickness
D. To replace all structural framing
Answer: B. To provide a resilient seal between the glass and framing
system
Rationale: Glazing gaskets provide compression and sealing between
the glass and the frame. They help accommodate movement, reduce
air and water infiltration, and protect the glass edge from direct
contact with the frame.
7. Which condition is most likely to cause glass breakage from
thermal stress?
