Master Streams Practice Test

Recommendations for supplying the pipe to waterway, minimum of ____ 3-inch lines to the triams, preferably _____

Two 3-inch lines; three preferred One 3-inch line; four preferred Three 3-inch lines; two preferred Two 2-inch lines; three preferred

Correct Answer:

Two 3-inch lines; three preferred

Explanation:

When feeding a waterway for a large master stream, you need enough water volume and pressure at the discharge. A single line generally won’t provide the required flow for the triams, so using two 3-inch supply lines increases the total available flow and reduces the effect of friction losses and elevation changes along the hose route, helping maintain the needed pressure at the nozzle. Adding a third 3-inch line provides extra margin to account for losses and any line issues, making the setup more reliable under varying fireground conditions. Using smaller lines would restrict flow even more and cause greater pressure drop, which is why they aren’t suitable. So the minimum is two 3-inch lines, with three lines preferred for extra margin.

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