What is the purpose of a CO2 bottle?

A CO2 bottle is specifically designed to extinguish fires. It contains compressed carbon dioxide gas, which, when released, displaces oxygen in the area, effectively suffocating the fire and preventing combustion. This method is particularly effective for fires involving flammable liquids or electrical equipment, as CO2 is non-conductive and non-corrosive.

In addition, CO2 extinguishers leave no residue after use, making them advantageous in settings where cleanup is a concern after a fire has been suppressed. The rapid cooling effect of the gas also helps in reducing the heat of the flames.

The other options serve different purposes: storing fuel is not related to fire suppression, powering machinery involves energy sources other than CO2, and ventilating areas is a function typically managed through air movement rather than extinguishing agents. Thus, the primary and most crucial role of a CO2 bottle is in fire extinguishment.