Question 2592 Deck General

The correct answer is A) Restricted. According to the regulations, butadiene is a flammable and toxic cargo, and the cargo tanks must be gauged using a restricted gauging system. Restricted gauging involves measuring the cargo level without opening the tank, which minimizes the risk of exposure to the hazardous vapors. Open gauging, which involves directly accessing the tank, is not allowed for this type of cargo. Closed gauging, where measurements are taken without opening the tank, is also required, but it is a more specific type of restricted gauging. Finally, "None" is incorrect as some type of gauging is mandated for the safe handling of butadiene.