Explanation Given that the reading of the pump is 180 lb. For every 50 feet section, the pressure is reduced by 3%. So, calculate the 1 st reduction as below. 180 × 3 % = 180 × 3 100 = 180 × 3 100 = 5.4 Subtract 5.4 from 180 to get the nozzle pressure of 1 st reduction as 180 − 5.4 = 174.6 . Given that the reading of the pump is 174.6 lb. For every 50 feet section, the pressure is reduced by 3%. So, calculate the 2 nd reduction as below. 174.6 × 3 % = 174.6 × 3 100 = 174.6 × 3 100 = 5.2 Subtract 5.2 from 174.6 to get the nozzle pressure of 2 nd reduction as 174.6 − 5.2 = 169.4 . Given that the reading of the pump is 169.4 lb. For every 50 feet section, the pressure is reduced by 3%. So, calculate the 3 rd reduction as below. 169.4 × 3 % = 169.4 × 3 100 = 169.4 × 3 100 = 5.1 Subtract 5.1 from 169.4 to get the nozzle pressure of 3 rd reduction as 169.4 − 5.1 = 164.3 . Given that the reading of the pump is 164.3 lb. For every 50 feet section, the pressure is reduced by 3%. So, calculate the 4 th reduction as below

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Chapter 4.5, Problem 33E

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The nozzle pressure at the end of six 50-ft sections.

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Chapter 4.5, Problem 32E

Chapter 4.5, Problem 34E

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The nozzle pressure at the end of six 50-ft sections.

Solution Summary: The author calculates the nozzle pressure at the end of six 50-ft sections as underset_150 lb.

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