You are crude oil washing on a tanker with an inert gas system. What percentage of oxygen must the inert gas system produce and deliver to the tanks?

Correct Answer: Option B — 5%

Inert gas systems on tankers must deliver gas with an oxygen content not exceeding 5% by volume. This concentration is critical to ensure the atmosphere within the cargo tanks remains below the Limiting Oxygen Concentration (LOC), effectively preventing the formation of a flammable mixture during crude oil washing operations.