🔍 Key Concepts

• Fire extinguisher classifications under 46 CFR (letter = class of fire, Roman numeral = size/capacity) • Difference between portable and semi-portable/fixed systems on vessels • Typical agent weight or capacity ranges for B-I, B-II, and B-III extinguishers

💭 Think About

• First, identify which of the choices are realistically portable versus very large units that would be hard to move by one person. • Think about which extinguishing agents are normally used for Class B (flammable liquids) fires on vessels. • Consider how the Roman numeral (I, II, III) relates to the increasing capacity/size of the extinguisher and match that to the approximate size/weight in the options.

✅ Before You Answer

• Verify which agents and sizes are actually listed as Class B extinguishers in the marine tables (not Class A only). • Check which of the listed sizes (gallons or pounds) would fall into the B-III capacity range, not the smaller B-I or B-II ranges. • Confirm that your choice is both portable and appropriate for flammable liquid fires typically found in machinery or fuel spaces.