Automatic is defined as?

• A. A device that transmits alarm signals to the Fire Department.
• B. An organization responsible for enforcing codes.
• C. A component used to store energy.
• D. A device, equipment, or system that initiates system function as a result of a predetermined temperature rise, rate of temperature rise, or combustion products, without human intervention.

Answer: (D)

Automatic means a device, equipment, or system starts, changes, or stops its function by itself in response to a preset condition—such as a specific temperature rise, the rate of temperature rise, or the presence of combustion products—without someone having to act. In flammable-refrigerant systems, this automatic action is what enables safety measures to operate immediately when conditions reach the preset trigger, like shutting off a valve, activating ventilation, or initiating a suppression sequence, all without human intervention. This contrasts with functions that are merely for alerting others (alarm transmission), entities that enforce codes (an organization), or components that store energy (not triggering actions).