Annual servicing of a hand portable CO2 fire extinguisher includes __________.

Correct Answer: Option B — weighing the cylinder and recharging if weight loss exceeds 10% of the weight of the charge

CO2 extinguishers are pressurized vessels that must be maintained per 46 CFR requirements. Weighing the cylinder is the standard method to verify the charge level. If the total weight drops by more than 10% of the rated capacity, the cylinder must be recharged to ensure sufficient extinguishing agent is available for emergencies.