🔍 Key Concepts

• Cargo oil containment requirements in 46 CFR for loading manifolds • How drip pans/fixed containers are sized relative to the diameter of the loading line • Conversion between pipe size, expected spill volume, and barrel capacity (1 barrel = 42 gallons)

💭 Think About

• Ask yourself how much oil could reasonably escape from an 8-inch line at the manifold before the system is secured, and what volume a safety regulation would likely require to contain that amount. • Compare each choice in barrels to its equivalent in gallons and think about which volume is consistent with regulatory safety margins for cargo oil transfers. • Consider whether the regulation sets a fixed number of barrels or if it scales with the diameter of the loading line, and how that affects an 8-inch line.

✅ Before You Answer

• Verify in 46 CFR the specific table or paragraph that links loading line diameter (inches) to minimum fixed container capacity (barrels). • Convert each answer choice from barrels to gallons and check if that seems sufficient for a brief uncontrolled discharge from an 8-inch line. • Confirm whether the regulation talks about the manifold drip pan or general deck containment, and make sure you are using the requirement that applies specifically under the manifold.