Which term best describes fuel escaping into the environment due to system failure?

• A. Spill
• B. Release
• C. Leak
• D. Contamination

Answer: (B)

Fuel escaping due to a system failure is described as a release. It’s the broad term for discharging a substance from equipment or containment into the environment, whether the discharge is sudden or ongoing. A spill implies a visible, often larger amount spilled from a container or surface mishap, and a leak suggests a slow, continual escape through a defect. Contamination describes the state of the environment after the fact, not the act of discharge itself. So release best captures the event of fuel entering the environment because of system failure.