What is the primary purpose of a foam blanket in firefighting?

• A. To create a barrier against smoke
• B. To cool hot surfaces and prevent re-ignition
• C. To absorb flammable liquids
• D. To aid in visibility during firefighting

Answer: (B)

The primary purpose of a foam blanket in firefighting is to cool hot surfaces and prevent re-ignition. Foam is designed to smother flames by forming a thin layer over the burning material. This layer not only suffocates the fire by restricting oxygen but also serves as an insulator, reducing heat transfer and cooling the surfaces below. By cooling these surfaces, foam minimizes the risk of re-ignition once the fire has been extinguished.

While a foam blanket may also help in some aspects, such as reducing the visibility of flames or fire, its main function is focused on cooling, avoiding thermal re-ignition, and creating a suppression barrier for combustible vapors. Other options mentioned do not accurately capture the essential role of foam in combating fires, which is primarily about cooling mechanisms and preventing flare-ups.