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 lines operate under extreme pressures exceeding 10,000 psi. A pinhole leak atomizes the fuel into a fine mist that easily contacts hot exhaust piping, presenting an immediate and catastrophic fire hazard requiring plant shutdown.