🔍 Key Concepts

• USCG extinguisher classification system for small/uninspected vessels (Class B size I vs II) • Typical agent weights/volumes that correspond to size B-I vs B-II ratings • Difference between extinguishing agents: CO2, dry chemical, foam, and water for flammable liquid fires

💭 Think About

• Which extinguisher types are appropriate for Class B (flammable liquid) fires typically found on boats (fuel, oil)? • Among the options, which one represents a larger capacity unit that would logically be rated as size II instead of size I? • How do CO2 extinguisher weights (in pounds of CO2) generally compare, in size, to small dry chemical or small foam units used as B-I extinguishers?

✅ Before You Answer

• Confirm which extinguisher types are actually rated for Class B fires (not just Class A). • Check which size (in pounds or gallons) the Coast Guard tables associate with B-I versus B-II for uninspected vessels. • Make sure the rating is about the quantity of agent (weight or volume), not just the physical extinguisher hardware type.