The fire extinguishing agent dispensed by the unit shown in the illustration is produced by __________. SF-0020

Correct Answer: Option B — educting mechanical foam through "D" and mixing it with water and air in chamber "E"

Mechanical foam is generated by an inline proportioner or eductor. The unit draws foam concentrate through port D, while water flows through the main line. In chamber E, the mixture is aerated to create a stable foam blanket, which effectively suppresses flammable liquid fires by excluding oxygen and cooling the fuel surface.