When is it best to apply a second dose of extinguishing agent?

Applying a second dose of extinguishing agent is most effectively done when the area is still smoldering. This is because smoldering represents a phase in which the fire is not fully extinguished and can reignite if not properly addressed. A second application at this stage helps to ensure all hot spots are cooled and that the fire does not flare back up, enhancing overall safety and fire control.

Timing is critical in firefighting; when a fire transitions to this smoldering stage, it may not be displaying active flames, but enough heat and residual embers still exist to pose a significant risk. Therefore, addressing these areas promptly with additional extinguishing agent can prevent re-ignition and facilitate complete extinguishment.

The other choices may not be as appropriate. For instance, addressing large flames might necessitate a different type of intervention or suppression tactic. Waiting for command to request a second dose could lead to delays that may allow the situation to worsen. Gauging extinguishment effectiveness is important, but it should guide immediate actions rather than delay them; if smoldering remains, prompt follow-up with additional agent application is needed.