Alarm Signal is described as a signal indicating an emergency requiring immediate action?

• A. A signal indicating a routine maintenance event.
• B. A signal from a security system.
• C. A signal that reports to the AHJ.
• D. A signal indicating an emergency requiring immediate action, such as fire.

Answer: (D)

An alarm signal is a signal indicating an emergency requiring immediate action. This is the purpose of an alarm: it prompts occupants and responders to react right away to a life-safety threat, such as a fire. The description fits this use because it specifies an emergency that demands urgent action. By contrast, signals for routine maintenance are informational and don’t call for immediate action; signals from a security system may indicate a breach but aren’t necessarily an on-site life-safety emergency; and a signal that reports to the AHJ is about notifying authorities, not triggering immediate on-site response. So the definition that matches an alarm signal is the one describing an emergency requiring immediate action, such as fire.