How far away from a refueling operation should no engine start or taxi occur?

The correct distance for no engine start or taxi during a refueling operation is 50 feet. This guideline is based on safety standards established to minimize the risk of ignition, which is critical during refueling when flammable materials are present. Keeping engines turned off and ensuring that aircraft do not taxi within this distance helps mitigate the chances of accidents that could arise from sparks or engine heat sources igniting fuel vapors.

The specified distance ensures that personnel and equipment remain safe, reducing the likelihood of dangerous incidents. Adhering to this rule is crucial for maintaining a secure and safe operating environment during refueling operations.