Which system is activated by heat to release water and suppress fires automatically?

• A. Defending in Place
• B. Automatic Sprinklers
• C. Access
• D. Water Removal

Answer: (B)

Automatic sprinkler systems are designed to respond directly to heat. Each sprinkler head has a heat-sensitive element (like a fusible link or a glass bulb). When the temperature reaches the head’s rating, the element activates and opens the valve, allowing water to flow into the piping and out of the head. This releases water automatically at the location of the heat, helping to suppress the fire quickly. This is different from Defending in Place, which is a safety strategy for occupants, or from Access and Water Removal, which relate to responder access or post-fire water management rather than automatic fire suppression.