During a yearly system test, which activity helps verify the response of initiating devices?

• A. Replacing all NACs.
• B. Functional tests of initiating devices.
• C. Installing new zones.
• D. Reprogramming the entire climate control.

Answer: (D)

During a yearly system test, the activity that directly verifies the response of initiating devices is performing functional tests on those devices. This means testing each initiating device—such as smoke detectors, heat detectors, and manual pull stations—by triggering them (or simulating a signal) to ensure the fire alarm control panel detects the activation, annunciates the correct zone, and starts the alarm as intended. This check confirms both the sensing element and the communication path to the panel are working reliably, so that actual events will produce the proper alarm response. Other activities don’t directly test initiating devices: replacing all notification appliances targets the audible/visual alarms, installing new zones changes system layout, and reprogramming the climate control is unrelated to initiating device operation.