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

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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.

a) 0.012

b) 0.013

c) 0.014

d) 0.015

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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.

a) 0.8m

b) 1.0m

c) 1.2m

d) 1.4m

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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

c) 0.8m/s

d) 0.9m/s

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5. What is the equation of the curve AB?

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Explanation: The curve AB (Specific Energy curve) is the combination of a parabola and a straight line, hence the valid equation is

6. What are y1 and y2 in the adjoining graph?

a) Conjugate depths

b) Alternate depths

c) Equal depths

d) Sequent depths

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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.

a) 0.01

b) 0.02

c) 0.03

d) 0.04

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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/m^{2}

b) 3.32 N/m^{2}

c) 4.32 N/m^{2}

d) 5.32 N/m^{2}

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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.

a) 2.05m

b) 3.05m

c) 4.05m

d) 5.05m

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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.

a) 1.14m

b) 2.14m

c) 3.14m

d) 4.14m

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**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__.