Questions and Answer

Issue 1 and Volume 86.

Questions and Answer NOTE;—Readers are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified Calculating Friction Loss To the Editor: I would like to know how to figure and find the friction losses in 2 1/2-inch and 1 1/2-inch hose. C. L. F. Answer: The method of finding the friction loss in fire hose is as follows: Friction loss per 100 feet of 2 1/2-inch hose=2XQ XQ+Q, where “Q” is the flow in the hose measured in hundreds of gallons per minute: that is, if the flow were 320 gallons per minute, then Q would be 320 divided by 100, or 3.2. Bear in mind the formula gives the friction loss in 100 feet of hose—and 2 1/2-inch hose only. Problem 1. What is the friction loss in 100 feet of 2 1/2 inch hose carrying 300 gallons…

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