Review Course Section Quiz 03

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SQ 3.1     A fighter plane is flying Mach 2.1 at an elevation of 50,000 feet above sea level. What is the plane’s speed if the speed of sound at 50,000 feet is 659.8 mph.
SQ 3.2     A 25’ long pipe is being sized to transport water at the rate of 31 gal./min. If the maximum velocity within the pipe is to be 2.0 ft./sec., what size pipe is required? Neglect gravitational and frictional forces.
SQ 3.3     What size would be required to decrease a pump’s capacity from 87 GPM to 72 GPM? The original impeller is 7.25”
SQ 3.4     Using the Darcy-Weisbach equation, what is the friction loss for the pipe in question 2? The Moody friction factor is 0.075, the density of water is 1 lb/ft3

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