The empty weight of a '100 pound' cylinder in a fixed CO2 fire extinguishing system is 130 pounds. What is the minimum acceptable weight of the cylinder before recharging would be required?

Correct Answer: Option C — 220 lbs

Fixed CO2 systems require periodic weight checks to ensure the agent charge is sufficient. Regulations mandate that if a cylinder loses more than 10% of its net weight, it must be recharged. For a 100-pound charge, a loss of 10 pounds triggers the requirement for immediate service.