The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is_____________________?
Correct answer: D. 2
- A. 0.5
- B. 1
- C. 1.5
- D. 2
Explanation
For the most economical trapezoidal channel, the hydraulic radius is half the flow depth, R = y/2. Therefore, the depth-to-hydraulic-radius ratio is y/R = 2.
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