Question

Water is flowing FULL through a rectangular tunnel of size 3 m (width) × 2 m (height). The average velocity of flow is 1 m/s. The frictional head loss is observed to be 1 m per km. Consider acceleration due to gravity (g) as 10 $m/s^2$. The correct statement(s) is/are

• A. Hydraulic radius is 0.6 m
• B. Darcy-Weisbach friction factor is 0.048
• C. Hydraulic radius is 2 m
• D. Darcy-Weisbach friction factor is 0.024

Answer 1

Answer: (A), (B)

Hydraulic radius is 0.6 m

Answer 2

The correct answer is (A and B) : Hydraulic radius is 0.6 m AND Darcy-Weisbach friction factor is 0.048