Find the loss of head due to friction in a smooth pipe of rectangular cross section of 1m x 0.5 m and 10m long. Velocity of flow is 10 m/s and the friction coefficient is 0.01962.
- A. 4m
- B. 6m
- C. 8m
- D. 10m
Answer: B. 6m
Explanation: Hydraulic mean depth m = Area/Perimeter = 0.5/3 = 1/6. hf = f L v² / (2 g m) = 0.01962 * 10 * 100 / (2 * 9.81 * 1/6) = 19.62 / (3.27) = 6 m.