You are on a vessel designed to carry compressed gasses in bulk with a cargo of butadiene. Which statement is TRUE?

Correct Answer: Option B — Silver and copper are prohibited in the parts of valves and fittings in contact with the cargo.

Butadiene can form highly sensitive explosive acetylides when in contact with certain metals. Consequently, 46 CFR regulations prohibit silver, copper, and their alloys in valve parts and fittings exposed to the cargo.