What type of signal is triggered by a fire alarm initiating device such as a pull station or automatic detector?

The correct answer is "Alarm signal" because this term specifically refers to the type of signal that is activated when a fire alarm initiating device, like a pull station or automatic detector, is triggered. Alarm signals are designed to alert occupants of a building to evacuate or respond immediately due to a potential fire emergency.

These signals are part of a comprehensive fire safety systems protocol, serving a crucial role in ensuring rapid response to fire incidents. Alarm signals can take the form of audible alarms, visual alerts like strobe lights, or a combination of both, effectively notifying individuals within the facility of the danger.

Other terms such as "Warning signal," "Alert signal," and "Notification signal" may relate to general notifications or systems designed to inform individuals about various levels of caution or different types of emergencies, but they do not specifically define the action that takes place when a fire alarm is activated. Therefore, these terms do not capture the urgency and specific function of a fire alarm system in the context of fire safety protocols.