Combustion can occur inside a piping system such as a vapor collection header in a marine emission control system. Which of the following will not aid in this combustion process?

Correct Answer: Option C — nitrogen

Nitrogen is an inert gas. As a primary fire prevention and inerting agent defined under 46 CFR, introducing nitrogen displaces oxygen, effectively starving the combustion triangle and preventing fire or explosion within vapor collection headers and emission control systems.