What are the three causes of fuel spills?

• A. Natural, mechanical, and human error
• B. Natural, weather, and mechanical
• C. Mechanical, human error, and equipment failure
• D. Natural, mechanical, and energy error

Answer: (A)

Fuel spills come from three broad categories: natural events, mechanical failures, and human error. Natural causes include external factors like weather or ground changes that can overwhelm containment systems. Mechanical refers to leaks or malfunctions in pumps, hoses, valves, tanks, or other equipment. Human error covers mistakes in handling, procedures, or compliance with safety controls.

The given best choice pairs these three overarching categories, covering external influences, equipment problems, and operator mistakes. Weather is a specific natural factor, and energy error isn’t a recognized category, while equipment failure fits under mechanical but doesn’t alone capture natural causes.