Which system type floods an enclosure with a fixed aerosol agent?

• A. Total flood
• B. Local protection
• C. Fixed aerosol
• D. Portable application

Answer: (C)

Fixed aerosol systems use a fixed, installed aerosol generator in the space to release a dense cloud that floods the entire enclosure. When activated, the aerosol fills the room and suppresses the fire by interfering with the flame chemistry, effectively stopping the combustion inside that defined space. This is precisely what the question describes. In contrast, a total flood could use other agents and flood the space with them, local protection targets only the specific hazard rather than the whole enclosure, and portable application relies on handheld extinguishers rather than a fixed installation.