🔍 Key Concepts

• 46 CFR requirements for A class divisions in fire protection regulations • What the standard fire test measures in terms of flame, smoke, and time • Difference between construction materials requirements and performance in a fire test

💭 Think About

• Look for the choice that first addresses HOW the bulkhead or deck must be built, not just how it performs in a test • Ask yourself: does the regulation define an A class division mainly by materials and continuity, or mainly by how long it resists flame/smoke? • Separate in your mind the definition of an A class division from the different A-60, A-30, etc., performance ratings

✅ Before You Answer

• Verify in 46 CFR Part 72 or 116 (fire protection) how an A class division is initially defined, before any A-60/A-30 subcategories are discussed • Check which option mentions both incombustible (non-combustible) materials AND continuity from deck to deck and to shell or other boundaries • Be careful not to confuse the general definition of an A class division with the specific time-rating requirements that belong to sub-classifications (like A-60).