Define initiation devices and notification appliances and explain their roles.

• A. Initiation devices detect or actuate events; Notification appliances provide audible/visual alerts to occupants.
• B. Initiation devices only provide audible alerts; Notification appliances detect fires.
• C. Initiation devices supply power to the panel; Notification appliances release water.
• D. Initiation devices are used only during testing; Notification appliances are optional.

Answer: (A)

Initiation devices are the sensors or actuators that start the alarm process. They detect conditions such as smoke, heat, or flame, or they provide a manual pull to trigger the system. When an initiation device is activated, it sends a signal to the fire alarm control panel, which then coordinates the response.

Notification appliances are the devices that communicate the alarm to occupants. They produce audible or visual signals—like horns, bells, sirens, strobes, or a speaker/PA system—so people know to evacuate or take action.

This combination is essential: initiation devices detect or initiate events, and notification appliances alert occupants. The other statements mischaracterize the roles: initiation devices are not limited to audible alerts, and notification appliances do not detect fires, release water, or serve only during testing. They operate together in normal, ongoing protection to provide timely warning and safe egress.