Which color corresponds to Gas, Oil Distribution in the color-coding scheme?

• A. Red
• B. Yellow
• C. Orange
• D. Blue

Answer: (B)

Gas and oil distribution lines are marked in yellow in the standard underground utility color-coding system. This bright color signals flammable fuels, so crews recognize these lines quickly and take appropriate safety precautions during digging or trenching. The system helps prevent striking lines and the hazards that come with them, and it’s widely used to coordinate markings before any excavation. Other colors correspond to different utilities—red for electric power, blue for potable water, and orange for communications—which is why yellow stands out specifically for gas and fuel distributions.