Question

In Fig. 2, suppose that pipe 1 is 90-cm, 1500 m long; pipe 2 is 60-cm, 900 m long; and pipe 3 is
50-cm, 400 m long. The elevations of the water surfaces in reservoirs A and B are 75 and 67
m, respectively, and the discharge through pipe 1 is 1.2m3/s. Assume f = 0.025 for the three
pipes. Find the elevation of the surface of reservoir C. Neglect minor losses and assume the
energy line and hydraulic grade line are coincident

Answer 1

Then the two branch pipes are said to be connected in parallel. In this arrangement the loss of head from section 1-1 to section 2-2 is equal to the loss of head in any one of the branch pipes.