List two active fire protection systems for buildings.

• A. Automatic sprinkler systems and fire alarms
• B. Fire rated walls and coatings
• C. Smoke detectors and extinguishers
• D. Exit signs and emergency lighting

Answer: (A)

Active fire protection systems are those that engage to control, suppress, or warn about a fire, rather than just resisting its spread. An automatic sprinkler system is a prime example because it releases water automatically when heat is detected, helping to suppress or contain the fire. A fire alarm system also fits, since it detects smoke or heat and automatically alerts occupants and authorities to trigger an organized response. The other options aren’t a pair of active systems: fire rated walls and coatings are passive protections that compartmentalize or insulate, while exit signs and emergency lighting aid evacuation rather than actively addressing the fire itself. Smoke detectors are an active component, but extinguishers are manual tools rather than an integrated active system, so they don’t form the two-system pairing described.