CA C17 Glazing Contractor Exam

CA C17 Glazing Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the minimum required edge clearance for most storefront

glass installations?

• 1/16 in
• 1/8 in
• 3/16 in
• 1/4 in

Rationale: 1/8 in is the standard edge clearance recommended for

storefront glazing to allow thermal expansion and building movement.

• Tempered glass is required for which of the following?
• Decorative spandrel glass
• Overhead glazing
• Hazardous locations
• All exterior windows

Rationale: Hazardous locations, as defined by code, require safety glazing

such as tempered or laminated glass.

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3. Laminated glass is typically used for:

• Low-cost storefronts
• Impact resistance and security
• Skylights only
• Interior partitions only

Rationale: Laminated glass has a PVB or interlayer that provides impact

resistance and increased security.

• The primary reason expansion joints are required in storefront

framing is:

• Noise reduction
• Thermal movement
• Fire resistance
• Wind load

Rationale: Aluminum expands significantly with temperature changes,

requiring expansion joints.

• What is the main purpose of a weep system in a storefront?
• Air infiltration
• Water drainage
• Structural support
• Thermal insulation

Rationale: Weep holes allow water to escape from glazing pockets and

prevent water buildup.

• Which tool is used to measure glass thickness?
• Tape measure
• Speed square
• Glass caliper 2 / 3

• Laser transit

Rationale: Glass calipers accurately measure glass thickness.

• The minimum bite of a glazing gasket on the edge of the glass is

generally:

• 1/16 in
• 1/4 in
• 3/8 in
• 1/2 in

Rationale: A minimum 1/4 in bite ensures proper retention and load

distribution.

8. In aluminum framing systems, a “shear block” is used to:

• Secure glazing vinyl
• Connect horizontal and vertical mullions
• Mount hardware
• Prevent water leakage

Rationale: Shear blocks allow attachment of horizontals to vertical

mullions.

• What is the standard thickness of tempered storefront glass?
• 1/8 in
• 1/4 in
• 3/8 in
• 1/2 in

Rationale: 1/4 in tempered glass is commonly used for typical storefronts.

10. The U-factor of a window indicates:

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