How do foam concentrate, solution, and finished foam differ?

How do foam concentrate, solution, and finished foam differ?

• A. Concentrate = raw foam liquid; Solution = concentrate plus water; Finished foam = solution after air is introduced.
• B. Concentrate = finished foam; Solution = water; Finished foam = mixture of concentrate and foam
• C. Concentrate = water; Solution = foam concentrate; Finished foam = dry foam
• D. Concentrate = water plus foam; Solution = foam in air; Finished foam = dry liquid

Answer: (C)

The main idea is how foam goes from a concentrate to the final foam you apply. Foam concentrate is the raw, concentrated chemical that will be used to make foam. It must be mixed with water to create a usable firefighting liquid, called the foam solution. This solution is then pumped through a nozzle or foam-making device where air is entrained to produce finished foam—the bubbly, aerated foam blanket that blankets the fire. So, the best description is: concentrate is raw foam liquid, solution is the concentrate mixed with water, and finished foam is the solution after air is introduced to create the aerated foam. The other descriptions mix up what concentrate, solution, and finished foam actually are or imply dry substances, which isn’t accurate for how foam systems operate.

The main idea is how foam goes from a concentrate to the final foam you apply. Foam concentrate is the raw, concentrated chemical that will be used to make foam. It must be mixed with water to create a usable firefighting liquid, called the foam solution. This solution is then pumped through a nozzle or foam-making device where air is entrained to produce finished foam—the bubbly, aerated foam blanket that blankets the fire.

So, the best description is: concentrate is raw foam liquid, solution is the concentrate mixed with water, and finished foam is the solution after air is introduced to create the aerated foam. The other descriptions mix up what concentrate, solution, and finished foam actually are or imply dry substances, which isn’t accurate for how foam systems operate.