Cargo tanks on barges fitted with goose neck vents and flame screens are limited to carrying which grade of cargo?
Official USCG Answer & Rule Citation
Correct Answer: Option D — D and E only
Title 46 CFR restricts barges fitted with basic gooseneck vents and flame screens to carrying lower volatility products—specifically Grade D and E combustible liquids. Higher grades (A, B, and C) emit flammable vapors requiring closed loading and specialized pressure-vacuum relief systems.
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