In order of capacity from least to greatest, which hydrant color sequence is correct?

In order of capacity from least to greatest, which hydrant color sequence is correct?

• A. Light Blue, Green, Orange, Red
• B. Red, Green, Orange, Light Blue
• C. Orange, Red, Green, Light Blue
• D. Red, Orange, Green, Light Blue

Answer: (D)

Hydrant color codes convey how much water a hydrant can deliver, so crews can estimate supply quickly. In this scheme, red signals the smallest capacity, orange a higher capacity, green an even higher capacity, and light blue the largest. Therefore, the sequence from least to greatest is red, orange, green, light blue. The other sequences mix higher-capacity colors ahead of lower-capacity ones, which would give an incorrect quick estimate. Note that some locations use slightly different mappings, but this order fits the standard interpretation used here.

Hydrant color codes convey how much water a hydrant can deliver, so crews can estimate supply quickly. In this scheme, red signals the smallest capacity, orange a higher capacity, green an even higher capacity, and light blue the largest. Therefore, the sequence from least to greatest is red, orange, green, light blue. The other sequences mix higher-capacity colors ahead of lower-capacity ones, which would give an incorrect quick estimate. Note that some locations use slightly different mappings, but this order fits the standard interpretation used here.