This set of Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on “Specific Energy – 2”.
1. The dimensions of a rectangular channel are 3m in depth and 4m in width. Calculate the bed slope of the channel if the specific energy is 3.13m. [C=50]
a) 1 in 1000
b) 1 in 1100
c) 1 in 1200
d) 1 in 1300
2. The depth of a trapezoidal channel section is 2m, base width of 3m and has a side slope of 1H:2V. Calculate n if the bed slope is 1 in 1000.
3. The specific energy of a channel section is 1.01m and the velocity of flow is 0.5m⁄s, calculate the depth of flow.
4. Calculate the velocity of flow through a channel having depth of 1.2m and specific energy equal to 1.24m.
a) 0.6 m/s
b) 0.7 m/s
Explanation: The curve AB (Specific Energy curve) is the combination of a parabola and a straight line, hence the valid equation is
Explanation: For a particular specific energy above the minimum specific energy there are two depths called as alternate depths.
7. The specific energy of a rectangular channel having dimensions 2m×3m is 3.095m. Calculate the friction factor.
8. Calculate the average shear stress for a rectangular channel having depth 0.5m, width 0.8m if the specific energy is 0.56m.
a) 2.32 N/m2
b) 3.32 N/m2
c) 4.32 N/m2
d) 5.32 N/m2
9. Calculate the specific energy for the most economical rectangular channel having depth 2m and width 4m if the bed slope of the channel is 1 in 1200. C = 35.
10. Estimate the specific energy for the most economical trapezoidal channel section having depth of 5m, side slope of 1H:4V and bed slope of 1 in 1200.
Sanfoundry Global Education & Learning Series – Fluid Mechanics.
To practice all areas of Fluid Mechanics, here is complete set of 1000+ Multiple Choice Questions and Answers.