When using stored-pressure water extinguishers, the nozzle should be discharged in which manner?

The correct method of discharging a stored-pressure water extinguisher involves sweeping the nozzle back and forth in a swift motion. This technique helps to create a wider area of coverage, allowing the water to effectively reach the base of the fire and extinguish it. By using a sweeping motion, the discharged water can cool a larger area and reduce the overall temperature of the fire, making it more effective in suppressing flames. This approach allows for better control and ensures a more efficient use of the water being discharged, maximizing the effectiveness of the extinguisher.

Holding the nozzle steady could lead to inefficient extinguishment, as it may not adequately cover the fire's spread. Pointing the nozzle straight down would not effectively reach the burning materials, and using the extinguisher intermittently could allow the fire to regain strength between discharges. Therefore, the sweeping motion is essential for ensuring that the water effectively penetrates and cools the fire, ultimately leading to successful suppression.