What does an AFFF extinguisher consist of?

What does an AFFF extinguisher consist of?

• A. 2.5 gallons of pre-mixed solution of AFFF concentrate and water, pressurized to 100 psi.
• B. 2.5 gallons of concentrate and water, pressurized to 200 psi.
• C. 1 gallon of pre-mixed solution of AFFF and water, pressurized to 100 psi.
• D. 3.5 gallons of pre-mixed solution of AFFF concentrate and water, pressurized to 120 psi.

Answer: (A)

This item tests what a portable AFFF extinguisher actually contains. A Navy AFFF extinguisher is a 2.5-gallon can pre-mixed with the aqueous film-forming foam solution, meaning the concentrate and water are already combined inside the unit. It is pressurized to about 100 psi, which provides the force to discharge the foam when you operate the handle. This combination of a fixed 2.5 gallons of ready-to-use solution and a 100 psi charge is what makes the extinguisher ready for quick, effective use on hydrocarbon fires. The other options don’t fit because they propose a mix of concentrate and water separately, or different total volumes and pressures. AFFF extinguishers aren’t typically 1 gallon or 3.5 gallons, and the standard Navy portable unit uses 2.5 gallons of pre-mixed solution at roughly 100 psi.

This item tests what a portable AFFF extinguisher actually contains. A Navy AFFF extinguisher is a 2.5-gallon can pre-mixed with the aqueous film-forming foam solution, meaning the concentrate and water are already combined inside the unit. It is pressurized to about 100 psi, which provides the force to discharge the foam when you operate the handle. This combination of a fixed 2.5 gallons of ready-to-use solution and a 100 psi charge is what makes the extinguisher ready for quick, effective use on hydrocarbon fires.

The other options don’t fit because they propose a mix of concentrate and water separately, or different total volumes and pressures. AFFF extinguishers aren’t typically 1 gallon or 3.5 gallons, and the standard Navy portable unit uses 2.5 gallons of pre-mixed solution at roughly 100 psi.