On small passenger vessels how many supply and exhaust ducts are required in each enclosed space containing gasoline powered machinery or gasoline fuel tanks?

Correct Answer: Option C — 2 of each

46 CFR 182.460 mandates that each enclosed space containing gasoline-powered machinery or fuel tanks must be provided with at least two supply ducts and two exhaust ducts. This redundant ventilation configuration ensures adequate airflow to prevent the accumulation of hazardous, explosive gasoline vapors within the engine compartment.