🔍 Key Concepts

• 46 CFR provisions for fire protection on Mobile Offshore Drilling Units (MODUs) • Size classifications for portable fire extinguishers based on agent weight • Differences in weight ranges between sizes I, II, III, and IV for CO₂ and dry chemical extinguishers

💭 Think About

• Compare the given extinguisher charges (15 lb CO₂ and 10 lb dry chemical) with the standard weight ranges for each size category • Think about whether these weights fall into the smallest, mid‑range, or larger portable extinguisher sizes used on vessels and MODUs • Consider if the same size designation applies to both CO₂ and dry chemical when the regulation lists them together

✅ Before You Answer

• Verify the exact weight ranges for extinguisher sizes I, II, III, and IV in the applicable CFR table • Confirm that both 15 lb CO₂ and 10 lb dry chemical appear on the same line/size category in the regulation • Make sure you are looking at the table for portable extinguishers on MODUs, not semi‑portable or fixed systems