This set of Fluid Mechanics Questions & Answers for Exams focuses on “Critical Flow in Different Channel Sections – 2”.

1. Calculate the maximum discharge through a triangular channel having a side slope of 1H:2V and the critical depth is 3m.

a) 15.26 m^{3}/s

b) 16.26 m^{3}/s

c) 17.26 m^{3}/s

d) 18.26 m^{3}/s

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2. Calculate the side slope of a triangular channel if the maximum discharge is 48.82 m3/s and the critical depth of the channel is 6m.

a) 1H:2V

b) 1H:3V

c) 1H:4V

d) 1H:5V

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3. The critical depth and base width of a trapezoidal channel is 2m and 5m respectively. Calculate the maximum discharge if the side slope of the channel is 1H:2V.

a) 29.21 m^{3}/s

b) 39.21 m^{3}/s

c) 49.21 m^{3}/s

d) 50.21 m^{3}/s

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4. The maximum discharge through a trapezoidal channel is 74.28 m^{3}/s. Calculate the critical depth of the channel is the side slope is equal to 1H:3V. B = 5m.

a) 2m

b) 3m

c) 4m

d) 5m

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5. For a critical flow Froude’s number is equal to 1.

a) True

b) False

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6. Calculate Froude’s number for a rectangular channel having depth 5m and velocity of flow is 5.94 m/s.

a) 1.0

b) 1.2

c) 1.4

d) 1.6

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7. Calculate the value of F_{r} if the value of hydraulic depth is 0.56m and the velocity of flow is 2.5 m/s.

a) 1.0

b) 1.5

c) 2.0

d) 2.5

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8. Calculate the Froude’s number for a triangular channel having depth 4m and side slope of 1H:4V. V = 1m/s.

a) 0.52

b) 0.42

c) 0.32

d) 0.22

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9. The top width of a triangular channel is 6m and the side slope of the channel is 1H:3V. Calculate the velocity of flow.

a) 5.54 m/s

b) 6.64 m/s

c) 7.64 m/s

d) 8.64 m/s

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