The foam fire suppression system that uses a pressure vessel and concentrate bladder is what type?

The foam fire suppression system that uses a pressure vessel and concentrate bladder is what type?

• A. Fixed system
• B. Deluge system
• C. Wet-pipe system
• D. Dry chemical system

Answer: (A)

Foam suppression systems that store concentrate in a pressure vessel with a bladder are designed as fixed foam systems. The bladder keeps the foam concentrate separated from the water until activation. When the system is activated, water pressure collapses the bladder, releasing the concentrate into the water flow to form foam for extinguishment. This setup is specific to fixed foam systems, whereas the other options describe different piping and media configurations (deluge and wet-pipe are all-water systems without concentrate bladder, and a dry chemical system uses dry powder, not foam).

Foam suppression systems that store concentrate in a pressure vessel with a bladder are designed as fixed foam systems. The bladder keeps the foam concentrate separated from the water until activation. When the system is activated, water pressure collapses the bladder, releasing the concentrate into the water flow to form foam for extinguishment. This setup is specific to fixed foam systems, whereas the other options describe different piping and media configurations (deluge and wet-pipe are all-water systems without concentrate bladder, and a dry chemical system uses dry powder, not foam).