Question 1011 Deck General

The correct answer is D) D or E. According to the regulations, cargo grades D and E may be carried in tanks that are vented only with gooseneck vents and flame screens. Cargo grades A, B, and C require more restrictive venting arrangements, such as pressure/vacuum relief valves. The reason for this is that grades D and E are considered less hazardous in terms of flammability and vapor pressure compared to the higher grades. The gooseneck vent and flame screen configuration is sufficient to safely vent these lower-risk cargo grades. The other answer choices are incorrect because B) would allow for the carriage of a more hazardous cargo grade (B), and C) and A) would be too restrictive, not allowing the carriage of the less hazardous grades D and E in tanks with this type of venting.