An immediate repair is required if a leak occurs in the high pressure fuel piping between the injection pump and fuel nozzle because of the __________.

Correct Answer: Option B — serious fire hazard

High-pressure fuel injection lines operate under extreme pressures exceeding 1,000 bar. Even a pinhole leak atomizes marine diesel oil into a fine mist that easily ignites upon contact with hot engine exhaust manifolds, creating an immediate, severe fire hazard.