Contractor Exam Questions And

CA D84 Epoxy Floor Systems Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary purpose of an epoxy floor system?
• Decorative only
• Chemical resistance only
• Provide a durable, chemical-resistant, and seamless floor
• Insulation

Rationale:

Epoxy floors are installed for durability, chemical resistance, and creating a seamless surface suitable for industrial and commercial environments.

• Which substrate is most suitable for epoxy floor installation?
• Wood
• Concrete
• Asphalt
• Tile

Rationale:

Epoxy adheres best to clean, cured concrete surfaces.

3. Before applying epoxy, concrete must be:

• Painted
• Cleaned, dry, and free of contaminants 1 / 3

• Wet
• Polished with wax

Rationale:

Surface preparation is critical; contaminants can prevent adhesion.

• What is the typical curing time for a standard 2-part epoxy floor at

25°C?

• 2 hours
• 6 hours
• 24–72 hours
• 7 days

Rationale:

Epoxy curing depends on temperature and humidity; standard systems usually cure within 1–3 days.

• What is the main hazard associated with epoxy resins?
• Fire
• Skin and respiratory irritation
• Electrocution
• Noise

Rationale:

Epoxy resins and hardeners can cause skin sensitization and respiratory issues; PPE is necessary.

• Which method is best for testing concrete moisture before epoxy

application?

• Visual inspection
• Hammer test
• Calcium chloride test
• pH paper

Rationale:

Moisture vapor emission can cause epoxy delamination; calcium chloride test is standard. 2 / 3

• What is the recommended minimum concrete strength for epoxy

flooring?

• 5 MPa
• 10 MPa
• 20 MPa
• 40 MPa

Rationale:

Concrete must have sufficient compressive strength (≥20 MPa) to support epoxy adhesion.

• Which is a common method of surface preparation for epoxy floors?
• Painting
• Shot blasting or grinding
• Acid washing only
• Tiling

Rationale:

Mechanical preparation like shot blasting ensures proper epoxy bonding.

• What does the term “pot life” refer to in epoxy application?
• The floor lifespan
• The time a mixed batch remains workable
• Curing time
• Drying time after application

Rationale:

Pot life is the usable time of epoxy once the resin and hardener are mixed.

• Which temperature range is ideal for applying epoxy floor

systems?

• -5°C to 10°C
• 10°C to 30°C
• 15°C to 25°C
• 30°C to 40°C

Rationale:

Temperature affects curing and adhesion; 15–25°C is optimal.

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