Which statement describes the color coding for AFFF concentrate valves?

Which statement describes the color coding for AFFF concentrate valves?

• A. They are Red and Blue
• B. They are Green and Yellow
• C. They are Purple and Orange
• D. They are White and Black

Answer: (A)

Color cues on AFFF concentrate valves are used so operators can identify the correct lines quickly and avoid mixing up systems. In this training context, the valves that handle AFFF concentrate are color-coded red and blue. This pairing stands out and provides a clear, distinct signal during charging, testing, or maintenance, reducing the chance of misoperation or cross-connecting lines. The red–blue scheme is the convention used in this material, making it the best answer. Other color pairings—green and yellow, purple and orange, white and black—do not match the standard coding described for AFFF concentrate valves in this context, so they wouldn’t be used here. Always refer to the site’s tagouts and legends, but for this question the red and blue identification is the expected convention.

Color cues on AFFF concentrate valves are used so operators can identify the correct lines quickly and avoid mixing up systems. In this training context, the valves that handle AFFF concentrate are color-coded red and blue. This pairing stands out and provides a clear, distinct signal during charging, testing, or maintenance, reducing the chance of misoperation or cross-connecting lines. The red–blue scheme is the convention used in this material, making it the best answer. Other color pairings—green and yellow, purple and orange, white and black—do not match the standard coding described for AFFF concentrate valves in this context, so they wouldn’t be used here. Always refer to the site’s tagouts and legends, but for this question the red and blue identification is the expected convention.