Which action regarding ventilation should be taken after extinguishers are expended?

Which action regarding ventilation should be taken after extinguishers are expended?

• A. Ventilation should be secured
• B. Ventilation should be increased
• C. Ventilation should be left on
• D. Ventilation is irrelevant

Answer: (A)

After extinguishing a fire, the priority is to limit air reaching any remaining hot spots and to keep smoke and fumes contained. Securing ventilation achieves that by reducing the oxygen flow into the space, which helps prevent reignition and keeps smoke from spreading to other compartments. If you leave vents open or increase ventilation, you could reintroduce oxygen to smoldering material and push smoke into other areas, making the situation more dangerous and harder to manage. Ventilation is not irrelevant, and leaving it on would undermine the extinguishing effort.

After extinguishing a fire, the priority is to limit air reaching any remaining hot spots and to keep smoke and fumes contained. Securing ventilation achieves that by reducing the oxygen flow into the space, which helps prevent reignition and keeps smoke from spreading to other compartments. If you leave vents open or increase ventilation, you could reintroduce oxygen to smoldering material and push smoke into other areas, making the situation more dangerous and harder to manage. Ventilation is not irrelevant, and leaving it on would undermine the extinguishing effort.