Leadership

QUESTIONS AND ANSWERS

Issue 10 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. Friction Loss and Nozzle Pressure. To the Editor: (1) A line of hose 400 feet long, 3 1/2 inches in diameter, is stretched from a fireboat and leads into a three-way Y gate connecting having three lines of 2 1/2-inch hose as follows: A 100-foot line equipped with 1 1/4-inch nozzle; 200-foot line, 1 1/8-inch nozzle, and a 300-foot line with 1-inch nozzle. The pumps of the fireboat maintain 175 pounds’ pressure. What is the pressure at the three-way connection, and how many gallons of water will each nozzle discharge? (2) What is the capacity of a highpressure hydrant? T. A. C. Fire Dept., New York. Feb. 26, 1918. Answer: (1) For the problem involving a single line of hose branching into two…

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