Backdraft prevention strategies include:

Backdraft prevention strategies include:

• A. Increase oxygen supply to speed up engine.
• B. Cool the atmosphere, control ventilation, and avoid creating an oxygen-rich environment until the fire is suppressed.
• C. Use only dry chemical extinguishers.
• D. Ventilate immediately to relieve pressure regardless of fire stage.

Answer: (B)

Backdraft is a danger that arises when hot, fuel-rich gases build up in a confined space and then meet fresh air. The key to preventing it is controlling heat and oxygen until the fire is under control. Cooling the atmosphere lowers the temperature of those gases, making ignition less likely. Carefully managing ventilation means avoiding drafts or openings that suddenly introduce a lot of oxygen; instead, ventilation should be controlled and staged so that air entry doesn’t feed the fire before it’s suppressed. This combination—reducing heat, limiting oxygen influx, and delaying fresh air until conditions are safe—directly reduces the chance of a dangerous backdraft when crews are operating in a compromised environment. Using a single extinguisher type or ventilating immediately without considering the fire stage doesn’t address the critical heat-oxygen balance that drives backdraft, so those approaches are not effective prevention strategies.

Backdraft is a danger that arises when hot, fuel-rich gases build up in a confined space and then meet fresh air. The key to preventing it is controlling heat and oxygen until the fire is under control. Cooling the atmosphere lowers the temperature of those gases, making ignition less likely. Carefully managing ventilation means avoiding drafts or openings that suddenly introduce a lot of oxygen; instead, ventilation should be controlled and staged so that air entry doesn’t feed the fire before it’s suppressed. This combination—reducing heat, limiting oxygen influx, and delaying fresh air until conditions are safe—directly reduces the chance of a dangerous backdraft when crews are operating in a compromised environment. Using a single extinguisher type or ventilating immediately without considering the fire stage doesn’t address the critical heat-oxygen balance that drives backdraft, so those approaches are not effective prevention strategies.