Electric cargo trucks shall not be operated within how many feet from aircraft during fueling or defueling operations or in the event of a fuel spill?

• A. 25 feet
• B. 75 feet
• C. 100 feet
• D. 50 feet

Answer: (D)

The main idea is keeping a safe separation around fueling activities to prevent ignition of fuel vapors. Fuel vapors can be present during fueling or defueling and if they reach any ignition source, even from electric equipment, a spark or discharge could ignite them. A defined safety buffer around the aircraft minimizes the chance that vapors will come into contact with potential ignition sources and also ensures there’s space for spill control and for emergency responders to operate.

The correct option corresponds to the standard distance used to provide that protective margin in fueling operations. Distances that are too small wouldn’t give enough time for vapors to disperse or for sparks to be kept away, while a much larger buffer would unnecessarily impede operation without adding extra practical safety beyond the established standard.