🔍 Key Concepts

• Hot work permits and certifications required before welding or cutting on a fuel tank • Difference between "safe for hot-work" and "safe for personnel" in tank atmospheres • Role of a marine chemist or competent person in certifying tanks

💭 Think About

• Ask yourself: Which condition specifically addresses the risk of sparks, flame, and ignition sources around fuel vapors? • Think about what welding actually involves—heat and sparks. Which label would directly authorize that kind of work? • Consider the difference between an atmosphere that is okay to enter and one that is okay to perform welding or burning inside—are those always the same?

✅ Before You Answer

• Verify which phrase would normally appear on a marine chemist’s certificate or hot-work permit before welding: hot-work or personnel • Check which option clearly indicates that ignition sources are allowed around the tank atmosphere • Make sure the choice you pick is the one that directly mentions authorization related to welding, burning, or cutting, not just entry or occupancy