The ratio of width to depth for the most economical rectangular 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 rectangular open channel, the width is twice the depth, so b/y = 2. This condition maximises hydraulic radius and hence flow capacity for a given area.
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