Calculating Friction Loss

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This training video covers the standard coefficient method of determining friction loss in hose lines. It also demonstrates how several of the concepts of friction loss present themselves on the fire ground.
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Which one has greater friction loss? A shorter hose with a smaller diameter? A longer hose with wider diameter?

罗.舒
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The coefficient of 3 inch hose is 0.8 not 0.08

cyrusmedic