According to U.S. regulations, which grade(s) of cargo may be carried in tanks that are vented only with gooseneck vents and flame screens?
Official USCG Answer & Rule Citation
Correct Answer: Option A — D or E
Under 46 CFR, lower volatility combustible liquid petroleum products classified as Grade D or E possess higher flash points and may be safely vented using conventional gooseneck vents equipped with approved flame screens.
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