What is the primary purpose of smoke control systems in high-rise buildings during fires?

• A. To limit smoke spread, maintain tenable egress paths, and aid firefighting operations.
• B. To extinguish fires automatically.
• C. To remove all smoke instantly from the building.
• D. To increase visibility by removing all gases.

Answer: (A)

Managing smoke movement is about protecting people and enabling firefighting efforts when a fire breaks out in a tall building. The primary purpose of smoke control is to limit how smoke spreads, keep escape routes like stairs and corridors tenable for occupants, and create safer conditions for responders to reach and tackle the fire. In a high-rise, this often means controlling pressurization and ventilation to keep egress paths clear and to slow smoke travel between zones, which buys valuable time for evacuation and investigation.

Other options overstate what smoke control does: it does not automatically extinguish fires, it does not instantly remove all smoke from the building, and it does not remove all gases to improve visibility. Instead, it strategically manages the smoke so people can evacuate and firefighters can operate more effectively.