🔍 Key Concepts

• Semi-portable CO₂ extinguisher size classifications (B-I, B-II, B-III, etc.) and their typical CO₂ charge weights • Difference between empty weight (extinguisher + hardware only) and full weight (extinguisher + CO₂ charge) • Typical CO₂ charge range for a B-III extinguisher under USCG requirements

💭 Think About

• First, think about the usual CO₂ charge size (in pounds or kilograms) associated with a B-III semi-portable extinguisher. How much agent does it normally carry? • Then, add that typical CO₂ charge to the given empty weight (35 lbs) to estimate the full charged weight. Which option is closest to that total? • Compare the increase in weight from empty to full for each choice. Which one reflects a realistic amount of CO₂ for a B-III unit (not too small, not excessively large)?

✅ Before You Answer

• Verify the standard CO₂ charge size for a B-III semi-portable extinguisher in your reference materials (training manual, USCG tables). • Check that the difference between full and empty weight in the answer you’re considering matches that standard charge size. • Confirm the units (lbs vs kg) make sense and that the paired values (lb/kg) in the option are consistent with each other.