Darcy proposed that the pressure gradient in a porous

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Unformatted text preview: ughness height 0.5 mm, the approximate Moody friction factor is (a) 0.012, (b) 0.018, (c) 0.038, (d) 0.049, (e) 0.102 FE6.5 Minor losses through valves, fittings, bends, contractions, etc., are commonly modeled as proportional to (a) total head, (b) static head, (c) velocity head, (d) pressure drop, (e) velocity FE6.6 A smooth 8-cm-diameter pipe, 200 m long, connects two reservoirs, containing water at 20°C, one of which has a surface elevation of 700 m and the other with its surface K FE6.7 FE6.8 FE6.9 FE6.10 FE6.11 elevation at 560 m. If minor losses are neglected, the expected flow rate through the pipe is (a) 0.048 m3/h, (b) 2.87 m3/h, (c) 134 m3/h, (d) 172 m3/h, (e) 385 m3/h If, in Prob. FE6.6 the pipe is rough and the actual flow rate is 90 m3/h, then the expected average roughness height of the pipe is approximately (a) 1.0 mm, (b) 1.25 mm, (c) 1.5 mm, (d) 1.75 mm, (e) 2.0 mm Suppose in Prob. FE6.6 the two reservoirs are connected, not by a pipe, but by a sharp-edged orifice of diameter 8 cm. Then the expected flow rate is approximately (a) 90 m3/h, (b) 579 m3/h, (c) 748 m3/h, (d) 949 m3/h, (e) 1048 m3/h Oil [ 0.1 kg/(m s), SG 0.9] flows through...
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