What function does an eductor serve in firefighting?

An eductor in firefighting primarily serves the function of sucking foam concentrate from a container and blending it with water in the firefighting stream. This device uses the principle of venturi, where water flows through a narrow section of the eductor, creating a vacuum that draws in foam concentrate from a separate container. As the foam concentrate is integrated with the water, it creates a foam solution that helps suppress fires, especially class B fires involving flammable liquids.

This functionality is crucial because it enables firefighters to effectively create and deliver the foam mixture directly to the fire, enhancing the extinguishing capability without the need for separate foam application methods. The efficient mixing of foam with water is essential for achieving the desired firefighting effectiveness, especially in situations where rapid response is necessary.

In contrast, options that suggest trapping fire, mixing without a specific mechanism, or releasing pressure pertain to separate fire control methods and equipment that do not accurately describe the primary role of an eductor.