What percentage of water does firefighting foam solution contain?

When discussing firefighting foam solutions, it's essential to recognize that these solutions typically contain a high percentage of water to function effectively. The correct answer is in line with the common composition of most foam concentrates, which usually range from 94% to 99.9% water when mixed with the appropriate amount of foam concentrate.

This high water content is crucial because it dilutes the concentrate, allowing the foam to expand and form a blanket that smothers the fire, cools the burning material, and prevents re-ignition. The foam also assists in reducing the release of flammable vapors, making it a vital tool in firefighting operations, particularly for flammable liquid fires.

Other ranges provided in the options are lower than typical formulations found in these foam solutions. For instance, options indicating lower percentages would not be consistent with the characteristics of modern firefighting foams, which are designed for maximum efficiency in extinguishing fires. Thus, understanding the proper formulation helps ensure that firefighting personnel are equipped with the right knowledge for effective fire suppression.