FC A Basic Alarms Practice Test

How is a smoke detector sensitivity test performed?

By turning up the sensitivity knob until it sounds

By removing the device and inspecting the wiring

By checking the detector color

Using approved test methods such as standardized aerosol or test smoke and observing detector response

Testing smoke detector sensitivity relies on approved, controlled methods that simulate smoke in a repeatable way. The best approach uses standardized aerosol or manufacturer-approved test smoke and you observe the detector’s response to that challenge. This provides a consistent, measurable way to confirm the device will alarm correctly when real smoke is present and to catch sensitivity drift as the detector ages or accumulates dust.

Other approaches don’t reliably test sensitivity: turning a knob until it sounds isn’t a standard or universal method and many detectors don’t even have such a control; removing the device to inspect wiring checks installation and condition but not how it responds to smoke; and simply checking the color tells you nothing about sensor performance.