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# 2 for flow of water at 20c through a straight smooth

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Unformatted text preview: a 50-mlong smooth 8-cm-diameter pipe. The maximum pressure drop for which laminar flow is expected is approximately (a) 30 kPa, (b) 40 kPa, (c) 50 kPa, (d) 60 kPa, (e) 70 kPa Air at 20°C and approximately 1 atm flows through a smooth 30-cm-square duct at 1500 ft3/min. The expected pressure drop per meter of duct length is (a) 1.0 Pa, (b) 2.0 Pa, (c) 3.0 Pa, (d) 4.0 Pa, (e) 5.0 Pa Water at 20°C flows at 3 m3/h through a sharp-edged 3cm-diameter orifice in a 6-cm-diameter pipe. Estimate the expected pressure drop across the orifice. (a) 440 Pa, (b) 680 Pa, (c) 875 Pa, (d) 1750 Pa, (e) 1870 Pa Textbook Table of Contents | Study Guide Comprehensive Problems 421 FE6.12 Water flows through a straight 10-cm-diameter pipe at a diameter Reynolds number of 250,000. If the pipe roughness is 0.06 mm, what is the approximate Moody friction factor? (a) 0.015, (b) 0.017, (c) 0.019, (d) 0.026, (e) 0.032 FE6.13 What is the hydraulic diameter of a rectangular air-ventilation duct whose cross section is 1 m by 25...
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## This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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