What color lettering are Avgas (100LL) lines (in fuel farms or refuelers)?

What color lettering are Avgas (100LL) lines (in fuel farms or refuelers)?

• A. Yellow
• B. White
• C. Black
• D. Blue

Answer: (D)

In fueling operations, color coding helps distinguish fuel types at a glance to prevent misfueling. Avgas (100LL) lines use blue lettering so technicians can quickly identify the fuel type and avoid connecting the wrong line to an aircraft or vehicle. This blue labeling stands out against typical equipment and helps maintain safety when multiple fuels are present in fuel farms or on refuelers. Other colors aren’t used for Avgas labeling in this setting because they don’t provide the same clear contrast or they’re reserved for identifying other fuel types or safety cues. Blue lettering for Avgas aligns with the convention that makes the correct fuel type immediately recognizable.

In fueling operations, color coding helps distinguish fuel types at a glance to prevent misfueling. Avgas (100LL) lines use blue lettering so technicians can quickly identify the fuel type and avoid connecting the wrong line to an aircraft or vehicle. This blue labeling stands out against typical equipment and helps maintain safety when multiple fuels are present in fuel farms or on refuelers.

Other colors aren’t used for Avgas labeling in this setting because they don’t provide the same clear contrast or they’re reserved for identifying other fuel types or safety cues. Blue lettering for Avgas aligns with the convention that makes the correct fuel type immediately recognizable.