Leadership

QUESTIONS AND ANSWERS

Issue 8 and Volume 63.

QUESTIONS AND ANSWERS Readers of Fire and Water Engineering are invited to send in questions, which will be answered in the order in which they are received. Engine Pressure and Friction Loss. To the Editor: Please solve the enclosed problem for the New York Fire Department through your Questions and Answers column: Problem: An engine is pumping water through eight lengths of 3-inch hose which branches into two lines of 2 1/2inch hose, each eight lengths, or 400 feet long. Each of these branch lines is equipped with a l)4-inch nozzle. What will be the nozzle pressure and what will be the friction loss? Show solution fully. P. E. New York, Feb. 6, 1918. Answer: You do not state in your problem what the engine pressure amounts to. Without the engine pressure in the above problem it would be impossible to determine the nozzle pressure. For the purpose of example…

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