To operate a carbon dioxide extinguisher having the type of head shown in the illustration, you would __________. Illustration SF-0008

Correct Answer: Option B — pull pin and open valve

Standard portable CO2 extinguishers with a lever-operated head require the removal of the safety pin to unlock the handle. Once the pin is pulled, the valve is opened by depressing the lever, allowing the pressurized gas to discharge through the horn. Always verify the specific manufacturer's operating instructions.