Which statement best defines an initiation device?

• A. Initiation devices detect or actuate events such as smoke, heat, or manual pull stations.
• B. Initiation devices only provide audible alerts.
• C. Initiation devices are only used during testing.
• D. Initiation devices supply power to the system.

Answer: (A)

Initiation devices are the parts of a fire alarm system that start the alarm by sensing a condition or by being manually triggered. They detect events such as smoke or heat automatically, or are activated when someone uses a manual pull station. When an initiation device is triggered, it sends a signal to the control panel to begin the alarm sequence, which then activates the notification devices like horns and strobes.

This is why the statement describing initiation devices as systems that detect or actuate events such as smoke, heat, or manual pull stations is the best fit. It captures both automatic detectors and manual activation as the initiating actions that start the alarm.

The other ideas aren’t accurate for initiation devices: they don’t merely provide audible alerts (that’s the job of the notification devices), they aren’t used only during testing, and they don’t supply power to the system—the power comes from the system’s power supply.