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The specific energy (E) of flow in a rectangular open channel at critical depth (yc) is equal to:

A1.25 yc
B1.50 yc
C2.00 yc
D2.50 yc

Explanation

For a rectangular channel, minimum specific energy Emin = yc + vc² / (2g) = yc + 0.5 yc = 1.5 yc (or 3/2 yc).

Submitted by: mcqstutor Team More Civil Engineering MCQs →

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