Question 960 Deck General

The correct answer is A) A. Regulations require that venting for cargo tanks in which only grades D or E liquids are to be transported shall, as a minimum, be of type A. This is specified in 46 CFR 32.55-10(a), which states that for tank barges constructed on or after July 1, 1951, the venting system must be of type A, which is the highest standard for cargo tank venting. The other options (B, C, D) are incorrect because they do not meet the minimum requirement of type A venting for cargo tanks carrying only grades D or E liquids on tank barges constructed after the specified date.