Illinois Glazier Licensing Examination

Illinois Glazier Licensing Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

Q1. What is the primary purpose of glazing gaskets in window systems?

• Improve window aesthetics
• Create a weather-tight seal between glass and frame
• Reduce window weight
• Support structural loads

Rationale: Gaskets prevent air and water infiltration, ensuring the glazing

system stays sealed.Q2. Tempered glass is required in which of the following locations?

• Standard bedroom windows
• Decorative wall mirrors
• Doors and locations subject to human impact
• Attic vents 1 / 4

Rationale: Tempered safety glass is required where breakage risk

threatens occupant safety.Q3. Which tool is MOST appropriate for accurately measuring glass size for replacement?

• Laser level
• Square
• Steel tape measure
• Punch tool

Rationale: Steel tape measures provide precise linear measurements

required for glass fabrication.Q4. What is the recommended edge clearance when installing insulated glass units (IGUs)?

• 1/32 in
• 1/16 in
• 1/8 in
• 1/4 in

Rationale: A 1/8-inch gap allows proper expansion and contraction within

the frame.Q5. Which component is used to support the weight of a glass lite inside a frame?

• Sealant
• Setting blocks 2 / 4

• Glazing tape
• Mullions

Rationale: Setting blocks transfer the glass weight to the frame without

stress points.Q6. Laminated glass consists of two or more glass layers bonded with which material?

• Silicone
• Polyurethane
• PVB (polyvinyl butyral)

D. PVC

Rationale: PVB interlayers hold broken glass together for safety.

Q7. Which type of sealant is most commonly used in structural glazing systems?

• Acrylic
• Polyurethane
• Silicone
• Latex

Rationale: Silicone has the strength and durability required for structural

glazing loads.Q8. What is the main purpose of weep holes in glazing systems?

• Increase ventilation
• Allow drainage of water from window frames 3 / 4

• Improve insulation
• Reduce frame movement

Rationale: Weep holes prevent water accumulation that could damage the

system.Q9. OSHA requires fall protection at what height for construction work?

• 10 ft
• 4 ft
• 6 ft
• 12 ft

Rationale: OSHA mandates fall protection for workers at 6 feet or higher.

Q10. When cutting glass, what is the correct angle to hold a glass cutter?

• 10 degrees
• 20 degrees
• 45 degrees
• 90 degrees

Rationale: A 45-degree angle produces a consistent score line for clean

breaks.

Q11. Which of the following is a characteristic of heat-strengthened glass?

• Breaks into tiny cubes
• Has twice the strength of annealed glass
• Cannot be used in commercial buildings
• / 4