🔍 Key Concepts

• B-II portable CO₂ extinguisher minimum charge requirements in 46 CFR (marine fire protection tables) • Relationship between empty weight, agent (CO₂) weight, and gross weight • Typical percentage loss allowed before a CO₂ extinguisher must be recharged

💭 Think About

• First, figure out how much CO₂ (the charge) should be in the extinguisher when it is full based on a standard B-II CO₂ rating. • Then, calculate what the normal full gross weight would be by adding the CO₂ charge to the empty weight. • Next, determine how much loss of charge (by weight) is allowed before recharging is required, and compare that to the answer choices.

✅ Before You Answer

• Confirm the standard CO₂ charge weight for a B-II portable extinguisher from the marine fire protection tables (46 CFR Part 25). • Compute the full gross weight = empty weight + CO₂ charge before considering any loss. • Check what percentage of loss the regulations allow for CO₂ extinguishers (typically a small % of the charge), then subtract that allowable loss from the full gross weight and match it to the closest choice.