AR GL – Glazing Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
Question 1
Which property of glass makes it particularly suitable for use in
windows and storefronts?
A. High flexibility under bending loads
B. High tensile strength under all conditions
C. Transparency and ability to transmit visible light
D. Complete resistance to thermal expansion
Rationale: Glass is widely used in windows and storefronts because it
allows visible light to pass through while providing a barrier against
weather and environmental conditions. Glass is relatively brittle and has
limited tensile strength compared with many structural materials. It
,also expands and contracts with temperature changes, so glazing
systems must accommodate thermal movement.
Question 2
What is the primary difference between annealed glass and fully
tempered glass?
A. Annealed glass contains no silica.
B. Fully tempered glass has been heat-treated to increase its strength
and alter its breakage pattern.
C. Annealed glass is always stronger than tempered glass.
D. Fully tempered glass cannot break.
Rationale: Fully tempered glass is heated and rapidly cooled during
manufacturing, producing compressive stresses at its surfaces and
tensile stresses internally. This process increases its resistance to impact
and thermal stress compared with annealed glass of the same
thickness. When fully tempered glass breaks, it generally fragments into
numerous relatively small pieces rather than large, sharp shards.
However, tempered glass can still break.
Question 3
,Which type of glass consists of two or more panes bonded together
with an interlayer?
A. Wired glass
B. Annealed glass
C. Laminated glass
D. Patterned glass
Rationale: Laminated glass is manufactured by bonding multiple glass
layers with an interlayer, commonly polyvinyl butyral (PVB) or an
ionoplast material. When the glass breaks, the interlayer helps retain
the fragments and may maintain a barrier across the opening.
Laminated glass is used in applications requiring safety, security, sound
reduction, or protection against falling glass.
Question 4
What is the principal purpose of heat-strengthened glass?
A. To make glass completely unbreakable
B. To improve resistance to thermal stress and mechanical loads
compared with annealed glass
C. To eliminate the need for edge clearance
D. To make glass flexible enough to bend by hand
, Rationale: Heat-strengthened glass is produced through controlled
heating and cooling. It generally has greater resistance to thermal
stress and mechanical loads than comparable annealed glass, but it is
not equivalent to fully tempered safety glass. Its breakage pattern is
generally more similar to annealed glass, and it is not automatically
classified as safety glazing.
Question 5
Which glass type is commonly used when a glazing application requires
the glass fragments to remain attached to an interlayer after breakage?
A. Clear annealed glass
B. Tinted annealed glass
C. Laminated safety glass
D. Uncoated float glass
Rationale: Laminated safety glass contains an interlayer that helps hold
broken pieces together. This reduces the likelihood of fragments falling
freely from the opening, although the degree of post-breakage
protection depends on the glass construction, interlayer, support
system, and loading conditions. The required glass type must be
selected according to the applicable safety glazing standards and
project specifications.
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
Question 1
Which property of glass makes it particularly suitable for use in
windows and storefronts?
A. High flexibility under bending loads
B. High tensile strength under all conditions
C. Transparency and ability to transmit visible light
D. Complete resistance to thermal expansion
Rationale: Glass is widely used in windows and storefronts because it
allows visible light to pass through while providing a barrier against
weather and environmental conditions. Glass is relatively brittle and has
limited tensile strength compared with many structural materials. It
,also expands and contracts with temperature changes, so glazing
systems must accommodate thermal movement.
Question 2
What is the primary difference between annealed glass and fully
tempered glass?
A. Annealed glass contains no silica.
B. Fully tempered glass has been heat-treated to increase its strength
and alter its breakage pattern.
C. Annealed glass is always stronger than tempered glass.
D. Fully tempered glass cannot break.
Rationale: Fully tempered glass is heated and rapidly cooled during
manufacturing, producing compressive stresses at its surfaces and
tensile stresses internally. This process increases its resistance to impact
and thermal stress compared with annealed glass of the same
thickness. When fully tempered glass breaks, it generally fragments into
numerous relatively small pieces rather than large, sharp shards.
However, tempered glass can still break.
Question 3
,Which type of glass consists of two or more panes bonded together
with an interlayer?
A. Wired glass
B. Annealed glass
C. Laminated glass
D. Patterned glass
Rationale: Laminated glass is manufactured by bonding multiple glass
layers with an interlayer, commonly polyvinyl butyral (PVB) or an
ionoplast material. When the glass breaks, the interlayer helps retain
the fragments and may maintain a barrier across the opening.
Laminated glass is used in applications requiring safety, security, sound
reduction, or protection against falling glass.
Question 4
What is the principal purpose of heat-strengthened glass?
A. To make glass completely unbreakable
B. To improve resistance to thermal stress and mechanical loads
compared with annealed glass
C. To eliminate the need for edge clearance
D. To make glass flexible enough to bend by hand
, Rationale: Heat-strengthened glass is produced through controlled
heating and cooling. It generally has greater resistance to thermal
stress and mechanical loads than comparable annealed glass, but it is
not equivalent to fully tempered safety glass. Its breakage pattern is
generally more similar to annealed glass, and it is not automatically
classified as safety glazing.
Question 5
Which glass type is commonly used when a glazing application requires
the glass fragments to remain attached to an interlayer after breakage?
A. Clear annealed glass
B. Tinted annealed glass
C. Laminated safety glass
D. Uncoated float glass
Rationale: Laminated safety glass contains an interlayer that helps hold
broken pieces together. This reduces the likelihood of fragments falling
freely from the opening, although the degree of post-breakage
protection depends on the glass construction, interlayer, support
system, and loading conditions. The required glass type must be
selected according to the applicable safety glazing standards and
project specifications.
