Issue 5 and Volume 78.

QUESTIONS AND ANSWERS “He that questioneth much shall learn much”-BACON NOTE—Readers of FIRE AND WATER ENGINEERING are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified. Determining Nozzle Pressure To the Editor: Is there any way for the operator of a pumper to determine the nozzle pressure of a fire stream? Very truly yours, L. A. Y. Answer: It is necessary for the operator of the pumper to know the number of lengths in the hose line, the diameter of the nozzle and the engine pressure. If the length of the hose line is known, the number of lengths may be found by dividing this figure in feet, by fifty. The following formula for the nozzle pressure should be used: Nozzle pressure in pounds = Engine pressure 1.1 + KL where L = the number of fifty foot…

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