What term refers to fire suppression systems that use water to extinguish fires?

• A. Automatic Sprinkler Systems
• B. Residential Occupancies
• C. Drains
• D. Piping

Answer: (A)

Water-based fire suppression systems that release water automatically through sprinkler heads when heat is detected are called Automatic Sprinkler Systems. This term describes the system designed to automatically discharge water to control or extinguish a fire in a building, which is exactly what NFPA 13R focuses on for low-rise residences. The other options don’t describe the general type of system: Residential Occupancies refers to the building's use or occupancy, not how the fire suppression works; Drains are just components used to remove water; Piping is a part of the system but not the system type itself. Automatic Sprinkler Systems specifically identifies the automatic, water-based approach that activates in response to heat.