What is the recommended action following aiming the nozzle on a fire extinguisher?

The recommended action following aiming the nozzle on a fire extinguisher is to sweep back and forth over the fire. This technique is effective because it helps to ensure that the extinguishing agent is distributed evenly over the burning material. By sweeping the nozzle, you can cover a larger area and ensure that the flames are fully extinguished, rather than just focusing on one spot. This method is particularly important for tackling fires, as applying the agent consistently helps to suppress the fire's intensity and prevent re-ignition.

The other actions, such as waiting for assistance, spraying continuously, or simply releasing the handle, do not provide the same level of effectiveness in extinguishing a fire. Waiting for assistance could delay critical intervention during an emergency. Continuous spraying may lead to inefficient use of the extinguisher, as it might not cover the fire evenly. Releasing the handle without properly applying the extinguishing agent would limit its effectiveness, potentially allowing the fire to continue burning. Therefore, sweeping back and forth is the best practice when using a fire extinguisher.