Florida Fire State Practice Exam

What substance is combined with foam concentrate to create a firefighting solution?

1. Alcohol

2. Water

3. Glycerin

4. Detergent

The correct answer is: Water

Foam concentrate is specifically designed to be mixed with water to create a firefighting solution effective for suppressing flammable liquid fires. When water is combined with foam concentrate, it enhances the performance of the foam by enabling it to cover the burning surface and smother the flames more effectively. This mixture creates a layer that not only cools the fire but also prevents oxygen from reaching the flammable material, thereby helping to extinguish the fire. While other substances listed may have various applications in different contexts, they are not typically used to create firefighting foams. Alcohol, for instance, is flammable and could be counterproductive when attempting to suppress fires. Glycerin might have other industrial uses but does not serve as a firefighting agent when mixed with foam concentrates. Detergent, although it can create bubbles, does not provide the necessary properties that water does in the context of foam-based firefighting. The primary reason water is chosen is due to its cooling properties and ability to support the creation of stable foam, which is crucial for effective fire suppression.