Which statement describes the effect of smothering in fire suppression?

Which statement describes the effect of smothering in fire suppression?

• A. Reduces the oxygen supply to the fire
• B. Cools the fire
• C. Removes fuel
• D. Ventilates the space

Answer: (A)

Smothering stops a fire by cutting off the oxygen that the flame needs to continue burning. When air access is blocked or the surrounding environment is made oxygen-poor, there isn’t enough oxygen for the combustion process, so the flame dies out. This is different from cooling the fire with water, which lowers the temperature; or removing fuel, which takes away the material that could burn; or ventilating the space, which would bring in more air and potentially feed the fire. So the effect described by smothering is reducing the oxygen supply to the fire.

Smothering stops a fire by cutting off the oxygen that the flame needs to continue burning. When air access is blocked or the surrounding environment is made oxygen-poor, there isn’t enough oxygen for the combustion process, so the flame dies out. This is different from cooling the fire with water, which lowers the temperature; or removing fuel, which takes away the material that could burn; or ventilating the space, which would bring in more air and potentially feed the fire. So the effect described by smothering is reducing the oxygen supply to the fire.