Question

Why are specialized foams designed solely for use on unignited spills of hazardous liquids?

A. The roll-on method is ineffective for hazardous liquids.
B. A thick, viscous foam can form a heat-resistant blanket over burning liquid surfaces.
C. The US Department of Agriculture Forest Service requires specialized foams for hazardous materials.
D. Unignited chemicals tend to change the pH of water or remove the water from fire fighting foam, making the foam ineffective.

Answer 1

Specialized foams designed for unignited spills of hazardous liquids form a thick, viscous foam that acts as a heat-resistant blanket, effectively putting out the fire.

Step-by-step explanation:

Specialized foams are designed solely for use on unignited spills of hazardous liquids because they can form a thick, viscous foam that acts as a heat-resistant blanket over burning liquid surfaces, effectively extinguishing the fire. This foam is made using fluorinated surfactants that reduce the surface tension of water, allowing it to spread across the burning surface and smother the fire. The use of specialized foams is crucial to ensure the safety and effectiveness of fire fighting efforts in hazardous situations.