When carrying a cargo of asphalt or molten sulfur, which are carried at temperatures of over 300°F, one of the biggest dangers is __________.

Correct Answer: Option C — water in the tanks or pipelines

Molten sulfur and asphalt are carried at temperatures exceeding the boiling point of water. If water enters the tank or pipeline, it flashes into steam instantly, expanding rapidly and causing a violent 'steam explosion' that can rupture tanks, damage piping, and cause catastrophic cargo release.