The stamped full weight of a 100 lb. CO2 bottle is 314 lbs. What is the minimum weight of the bottle before it has to be recharged?

Correct Answer: Option D — 304 lbs.

Fixed CO2 cylinders must be recharged if their weight drops more than 10 percent from the stamped full charge. For a bottle with 100 lbs of agent and a total full weight of 314 lbs, a 10 lb loss equals 304 lbs minimum.