What distance must a refueler stay from a fueling port or vent?

What distance must a refueler stay from a fueling port or vent?

• A. 10 Feet
• B. 15 Feet
• C. 25 Feet
• D. 50 Feet

Answer: (C)

During fueling, keeping a safe clearance from the fueling port or vent is crucial to prevent ignition hazards from fuel vapors, spray, or static discharge. A distance of twenty-five feet provides a practical buffer where vapors drifting from the vent, any incidental spray, and potential ignition sources are less likely to affect personnel or equipment. It also accounts for wind effects and the possibility of fuel vapors pooling near ground level, which helps reduce the chance of ignition or exposure. Ten feet or fifteen feet would be too close to the vent and any vapor plume or spray, increasing risk, while fifty feet is more than the typical minimum required and would hinder operational efficiency without adding necessary safety benefit. So the standard safe distance is twenty-five feet.

During fueling, keeping a safe clearance from the fueling port or vent is crucial to prevent ignition hazards from fuel vapors, spray, or static discharge. A distance of twenty-five feet provides a practical buffer where vapors drifting from the vent, any incidental spray, and potential ignition sources are less likely to affect personnel or equipment. It also accounts for wind effects and the possibility of fuel vapors pooling near ground level, which helps reduce the chance of ignition or exposure.

Ten feet or fifteen feet would be too close to the vent and any vapor plume or spray, increasing risk, while fifty feet is more than the typical minimum required and would hinder operational efficiency without adding necessary safety benefit. So the standard safe distance is twenty-five feet.