If the nozzle crew reports not enough foam at the nozzle, how should the pump operator correct this problem?

• A. Increase water pressure
• B. Add additional foam concentrate
• C. Replace the nozzle
• D. Decrease foam concentrate

Answer: (B)

Foam is created by mixing foam concentrate with water in a specific proportion, and the pump operator controls that mixing through the foam-proportioning device. When the nozzle crew reports not enough foam at the nozzle, the problem is the mixture isn’t getting enough concentrate to the stream. The appropriate fix is to add more foam concentrate to the system so the solution reaching the nozzle is richer and reaches the target proportion.

In practice, you would open or adjust the concentrate feed or replenish the concentrate supply, ensuring you stay within the manufacturer’s recommended foam-to-water ratio and that the proportioning device and lines are functioning (no obstructions, primed lines, and correct settings). After increasing the concentrate, recheck the nozzle to confirm the foam quality and quantity meet the demand. Do not rely on changing the nozzle or simply increasing water pressure, and avoid decreasing the concentrate.