8.27 A reservoir at 300 ft elevation has a 6-in.-diameter discharge pipe located 50 ft below the surface. The pipe is 600 ft long and drops in elevation to 150 ft where the flow discharges to the atmosphere.

The pipe is made of riveted steel with a roughness height of 0.005 ft. Determine

(a) the flow rate without a head loss and (b)

the flow rate with the pipe friction head loss. Since the velocity is not known for part b and the Reynolds number and friction factor depend on velocity, you will need to iterate to find the solution. A good first guess is the velocity from part (a).