Issue 5 and Volume 80.

QUESTIONS AND ANSWERS “He that questioneth much shall learn MUCH”-BACON NOTE—Readers of FIRE ENGINEERING are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified. Engine Pressure, Friction Loss, Etc. To the editor: Below are two questions handed me by members of my company. Will you publish, answers to them in an early issue of your magazine. Respectfully yours. M. E. A. Question 1: (A) An engine is pumping through 500 feet of 3-inch hose equipped with a 1 1/4-inch nozzle. Engine pressure is 120 pounds. What is the nozzle pressure? What is the discharge in gallons per minute? (B) What is the advantage of using siamesed lines of hose over single lines of the same size? Answer 1: (A) The first part of this problem is solved by employing the Underwriters Formula. This formula is: nozzle pressure equals…

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