What is the purpose of isolating a fire section and shutting dampers during a drill?

• A. To test HVAC performance
• B. To isolate the fire, prevent spread, protect intact compartments, and maintain integrity of the fire control system.
• C. To maximize airflow to other compartments
• D. To vent smoke to exhaust

Answer: (B)

Isolating a fire section and shutting dampers tests how well a building contains a fire and protects what remains safe. By creating a closed boundary around the affected area, the ventilation paths and other openings are blocked from helping the fire spread, which helps keep other compartments tenable for occupants and responders. This action also checks that the fire control system—dampers, doors, and associated controls—continues to function as designed during an incident, preserving the integrity of the system and the overall fire protection scheme.

This isn’t about testing general HVAC performance, nor about pushing more air into other spaces. It also isn’t about venting smoke to exhaust, which would defeat the containment goal. The purpose is containment, protection of intact areas, and maintaining system integrity during a drill.