Indiana Glazing Contractor Local
Jurisdiction Questions And Correct
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Rationales 2026 Q&A Instant Download
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1. Which condition most strongly indicates that a glass pane should be treated
as safety glazing rather than ordinary annealed glass?
A. The pane is located in a fixed wall more than 8 feet above the floor.
B. The pane is exposed to normal sunlight.
C. The pane is located in a hazardous location where human impact is
reasonably foreseeable.
D. The pane is installed in a non-load-bearing wall.
Answer: The pane is located in a hazardous location where human impact is
reasonably foreseeable.
Rationale: Safety glazing requirements are intended to reduce injury when
people may impact the glass. Hazardous locations are determined by factors
such as proximity to doors, walking surfaces, and other impact-prone areas.
2. What is the primary structural advantage of tempered glass over annealed
glass?
A. It has a lower coefficient of thermal expansion.
B. It has substantially greater resistance to mechanical and thermal stresses.
,C. It cannot break under impact.
D. It automatically provides better insulation.
Answer: It has substantially greater resistance to mechanical and thermal
stresses.
Rationale: Tempering creates compressive stresses at the glass surfaces,
increasing strength and resistance to thermal and mechanical loading.
Tempered glass can still break and must not be treated as unbreakable.
3. A tempered glass lite is found to have a small edge chip before installation.
What should the glazing contractor do?
A. Install it because tempered glass is stronger than annealed glass.
B. Fill the chip with silicone and proceed.
C. Grind the chip deeper until it disappears.
D. Reject or properly evaluate the lite according to the manufacturer's
requirements before installation.
Answer: Reject or properly evaluate the lite according to the manufacturer's
requirements before installation.
Rationale: Edge damage can significantly affect glass performance, particularly
in tempered glass. Field repairs that compromise the edge are generally not an
acceptable substitute for properly evaluating damaged glass.
4. Why must tempered glass generally be cut and fabricated before tempering?
A. Tempering makes glass transparent.
B. Tempering increases the glass thickness.
C. The tempering process creates stresses that make subsequent cutting or
drilling likely to cause breakage.
D. Tempering removes the need for edge finishing.
Answer: The tempering process creates stresses that make subsequent cutting
or drilling likely to cause breakage.
,Rationale: Holes, notches, cutouts, and edge shaping normally must be
completed before tempering. Attempting to modify tempered glass afterward
can cause the entire lite to fracture.
5. What is the principal purpose of a setting block beneath a glass lite?
A. To bond the glass permanently to the frame.
B. To increase visible glass area.
C. To support and position the glass while distributing its weight away from
direct contact with the frame.
D. To prevent all thermal movement.
Answer: To support and position the glass while distributing its weight away
from the frame.
Rationale: Setting blocks provide controlled support and help prevent glass-to-
metal contact. Their size, location, hardness, and compatibility should follow the
glazing system and manufacturer's requirements.
6. A glazing contractor installs a large insulating glass unit directly against a
metal frame without proper setting blocks. What is the greatest concern?
A. Increased daylight transmission.
B. Improved thermal performance.
C. Stress concentration and potential glass or seal failure.
D. Excessive sound absorption.
Answer: Stress concentration and potential glass or seal failure.
Rationale: Direct glass-to-frame contact can create concentrated stresses and
damage the glass or insulating-glass edge system. Proper setting and edge
clearances are essential.
7. What is the primary function of an insulating glass unit's edge seal?
A. Increase the glass's visible light transmission.
B. Maintain the sealed cavity and help prevent moisture infiltration.
, C. Make the glass impact resistant.
D. Replace the need for a frame.
Answer: Maintain the sealed cavity and help prevent moisture infiltration.
Rationale: The primary and secondary seal systems work together to preserve
the insulating-glass cavity and protect against moisture entry. Seal failure can
produce fogging and reduced thermal performance.
8. What does low-emissivity coating primarily improve?
A. Impact resistance only.
B. Glass hardness.
C. Thermal performance by reducing radiative heat transfer.
D. Resistance to physical abrasion.
Answer: Thermal performance by reducing radiative heat transfer.
Rationale: Low-E coatings reduce emissivity, limiting radiant heat transfer
through the glazing assembly. They do not replace proper framing, air sealing,
or insulation.
9. Why should a glazing contractor verify the orientation of a coated glass lite
before installation?
A. Coatings always need to face outdoors.
B. Coatings always need to face indoors.
C. The coating may be designed for a specific surface of the glazing unit to
achieve the intended performance.
D. Orientation affects only appearance and never performance.
Answer: The coating may be designed for a specific surface of the glazing unit to
achieve the intended performance.
Rationale: Low-E and reflective coatings may be specified for particular surfaces
within a unit. Incorrect orientation can reduce energy performance, alter solar
control, or cause appearance problems.
Jurisdiction Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. Which condition most strongly indicates that a glass pane should be treated
as safety glazing rather than ordinary annealed glass?
A. The pane is located in a fixed wall more than 8 feet above the floor.
B. The pane is exposed to normal sunlight.
C. The pane is located in a hazardous location where human impact is
reasonably foreseeable.
D. The pane is installed in a non-load-bearing wall.
Answer: The pane is located in a hazardous location where human impact is
reasonably foreseeable.
Rationale: Safety glazing requirements are intended to reduce injury when
people may impact the glass. Hazardous locations are determined by factors
such as proximity to doors, walking surfaces, and other impact-prone areas.
2. What is the primary structural advantage of tempered glass over annealed
glass?
A. It has a lower coefficient of thermal expansion.
B. It has substantially greater resistance to mechanical and thermal stresses.
,C. It cannot break under impact.
D. It automatically provides better insulation.
Answer: It has substantially greater resistance to mechanical and thermal
stresses.
Rationale: Tempering creates compressive stresses at the glass surfaces,
increasing strength and resistance to thermal and mechanical loading.
Tempered glass can still break and must not be treated as unbreakable.
3. A tempered glass lite is found to have a small edge chip before installation.
What should the glazing contractor do?
A. Install it because tempered glass is stronger than annealed glass.
B. Fill the chip with silicone and proceed.
C. Grind the chip deeper until it disappears.
D. Reject or properly evaluate the lite according to the manufacturer's
requirements before installation.
Answer: Reject or properly evaluate the lite according to the manufacturer's
requirements before installation.
Rationale: Edge damage can significantly affect glass performance, particularly
in tempered glass. Field repairs that compromise the edge are generally not an
acceptable substitute for properly evaluating damaged glass.
4. Why must tempered glass generally be cut and fabricated before tempering?
A. Tempering makes glass transparent.
B. Tempering increases the glass thickness.
C. The tempering process creates stresses that make subsequent cutting or
drilling likely to cause breakage.
D. Tempering removes the need for edge finishing.
Answer: The tempering process creates stresses that make subsequent cutting
or drilling likely to cause breakage.
,Rationale: Holes, notches, cutouts, and edge shaping normally must be
completed before tempering. Attempting to modify tempered glass afterward
can cause the entire lite to fracture.
5. What is the principal purpose of a setting block beneath a glass lite?
A. To bond the glass permanently to the frame.
B. To increase visible glass area.
C. To support and position the glass while distributing its weight away from
direct contact with the frame.
D. To prevent all thermal movement.
Answer: To support and position the glass while distributing its weight away
from the frame.
Rationale: Setting blocks provide controlled support and help prevent glass-to-
metal contact. Their size, location, hardness, and compatibility should follow the
glazing system and manufacturer's requirements.
6. A glazing contractor installs a large insulating glass unit directly against a
metal frame without proper setting blocks. What is the greatest concern?
A. Increased daylight transmission.
B. Improved thermal performance.
C. Stress concentration and potential glass or seal failure.
D. Excessive sound absorption.
Answer: Stress concentration and potential glass or seal failure.
Rationale: Direct glass-to-frame contact can create concentrated stresses and
damage the glass or insulating-glass edge system. Proper setting and edge
clearances are essential.
7. What is the primary function of an insulating glass unit's edge seal?
A. Increase the glass's visible light transmission.
B. Maintain the sealed cavity and help prevent moisture infiltration.
, C. Make the glass impact resistant.
D. Replace the need for a frame.
Answer: Maintain the sealed cavity and help prevent moisture infiltration.
Rationale: The primary and secondary seal systems work together to preserve
the insulating-glass cavity and protect against moisture entry. Seal failure can
produce fogging and reduced thermal performance.
8. What does low-emissivity coating primarily improve?
A. Impact resistance only.
B. Glass hardness.
C. Thermal performance by reducing radiative heat transfer.
D. Resistance to physical abrasion.
Answer: Thermal performance by reducing radiative heat transfer.
Rationale: Low-E coatings reduce emissivity, limiting radiant heat transfer
through the glazing assembly. They do not replace proper framing, air sealing,
or insulation.
9. Why should a glazing contractor verify the orientation of a coated glass lite
before installation?
A. Coatings always need to face outdoors.
B. Coatings always need to face indoors.
C. The coating may be designed for a specific surface of the glazing unit to
achieve the intended performance.
D. Orientation affects only appearance and never performance.
Answer: The coating may be designed for a specific surface of the glazing unit to
achieve the intended performance.
Rationale: Low-E and reflective coatings may be specified for particular surfaces
within a unit. Incorrect orientation can reduce energy performance, alter solar
control, or cause appearance problems.
