Which of the following is NOT a step in applying foam?

• A. Ignition
• B. Proportioning
• C. Foam generation
• D. Distribution

Answer: (A)

Ignition is not part of applying foam. Foam application follows these steps: proportioning, where the foam concentrate is mixed with water at the correct ratio; foam generation, where the foam solution is formed into bubbles and a stable blanket; and distribution, which delivers and places that foam onto the fire or fuel surface to create the protective layer. Proportioning ensures the foam behaves correctly; generation creates the foam mass; distribution places it where it can suppress flames and cool the area. Ignition refers to starting or sustaining combustion, which is not involved in the foam application steps.