When verifying a smoke detector, what is the required method to confirm its operation?

Question: When verifying a smoke detector, what is the required method to confirm its operation?

Answer options:

• Using the internal magnet test switch only ✅ Introduction of smoke or simulated smoke into the sensing chamber
• Measuring the voltage at the detector terminals
• Visual inspection of the detector's 'power on' LED

Correct answer: Introduction of smoke or simulated smoke into the sensing chamber

Explanation: CAN/ULC-S537-19 Clause 5.5.1 requires each smoke detector to be tested in place via the introduction of smoke or aerosol to ensure response. Operating the internal magnetic test switch is not sufficient for verification.