Regulations require that cargo pumprooms handling grades D and/or E liquid cargo only shall be fitted with at LEAST how many ducts extended to the weather deck?

Correct Answer: Option B — 2

Title 46 CFR mandates that cargo pumprooms handling grades D and/or E liquid cargoes must be fitted with at least two ventilation ducts extending to the weather deck, ensuring adequate natural or mechanical exhaust of heavier-than-air hydrocarbon vapors.