Fire Alarm Lesson 7&8 Practice Test

Drift compensation is about keeping a detector’s response stable as its sensing element's characteristics change with time and environment. Over months and years, factors like aging, temperature, humidity, and dust can shift the baseline sensitivity. Drift compensation uses automatic adjustments to sensitivity or thresholds so the device still detects real hazards without becoming overly sensitive or missing a true event. By continuously tuning itself to preserve a consistent response, it goes beyond a one-time calibration. The idea described—adjusting detector sensitivity to account for environmental changes and maintain a consistent response—is the best fit. Fixed-interval calibration, replacing detectors, or turning detectors off are separate maintenance or operational actions and don’t describe the ongoing adjustment process.