Question 1407 Deck General

The correct answer is B) water in the tanks or pipelines. The key danger when carrying cargo of asphalt or molten sulfur at temperatures over 300°F is the risk of water in the tanks or pipelines. Water in contact with these extremely hot cargoes can flash to steam, causing a sudden pressure surge or even an explosion. This is a major safety concern that needs to be carefully managed when handling these types of hazardous hot liquid cargoes. The other answer choices are incorrect. A) explosion of vapors after discharge is not the main concern, as the risk is during loading/unloading when water could interact with the hot cargo. C) having the cargo too cool is also not the primary issue, as the danger is related to water intrusion, not cargo temperature. D) inadequate ullage space is not the biggest risk factor for these hot liquid cargoes.