Rain down method involves which action?

• A. Foam is directed onto the ground near the edge of the spill and rolled across.
• B. Foam is sprayed directly onto water to cap the pool.
• C. Foam is fired high into the air above the fire, allowing it to gently fall onto the surface.
• D. Foam is directed into the air above the fire, allowing it to gently fall on the surface.

Answer: (D)

Rain down means directing foam into the air above the fire so it falls gently onto the surface, forming a thin, even blanket. This approach lets foam droplets settle over the fuel, cooling it and creating a barrier between the fuel and the air without stirring up the liquid. It provides controlled, uniform coverage and minimizes splashing or turbulence that can occur with other methods. The other options describe different foam application techniques that either roll foam along the surface, spray directly onto the liquid to cap it, or shoot foam high with heavy impact—none of which achieve the same gentle, above-the-fire fall that defines the rain-down method.