What is required for a dry exhaust pipe? (small passenger vessel regulations)

Correct Answer: Option B — Noncombustible hangers and supports

46 CFR 182.430 mandates that dry exhaust pipes on small passenger vessels be supported by noncombustible hangers or supports. This requirement prevents heat transfer to the vessel's structure, mitigating fire risks associated with high-temperature exhaust components while ensuring the exhaust system remains securely fastened during vessel motion and vibration.