On a color-coded blueprint, which color line is used to designate gas lines?

On a color-coded blueprint, which color line is used to designate gas lines?

• A. Red line
• B. Yellow line
• C. Green line
• D. Blue line

Answer: (B)

Color-coding on blueprints helps you identify different services quickly, and gas lines are shown in yellow because it stands out and signals a hazard. Yellow contrasts with the colors used for water (often blue for cold and red for hot), making gas piping easy to spot during planning, installation, and safety checks. Always check the blueprint legend, since some drawings may use variations, but yellow is a common standard used to represent gas lines.

Color-coding on blueprints helps you identify different services quickly, and gas lines are shown in yellow because it stands out and signals a hazard. Yellow contrasts with the colors used for water (often blue for cold and red for hot), making gas piping easy to spot during planning, installation, and safety checks. Always check the blueprint legend, since some drawings may use variations, but yellow is a common standard used to represent gas lines.