CIV E 444 - APPLIED HYDRAULICS
SPRING 2016
LAB No. 9


  1. An orifice is to be designed to have a change in pressure of Δp = 2000 lbs/ft2 across the orifice, for a discharge of Q = 100 cfs in a pipe of diameter D = 4 ft. The temperature of the water is 60oF. What orifice diameter (to 0.1 ft accuracy) will yield the desired discharge?

  2. What is the discharge Q for a drop of Δh = 10 m through an orifice of diameter 0.25 and pipe diameter 1 m. Assume T = 20°C.

  3. What is the drop Δh (m) for a discharge of 0.6 m3/s through an orifice of diameter 0.25 and pipe diameter 1 m. Assume T = 20°C.

  4. Determine the discharge through the hydraulic system shown below. Assume entrance loss coefficient Ke = 0.12 and bend loss coefficient Kb = 0.35. Locate the point of maximum and minimum pressures along the line. Calculate the maximum and minimum pressures.