Civil Engineering > GATE 2022 SET-2 > Open Channel Flow
Water is flowing in a horizontal, frictionless, rectangular channel. A smooth hump is built on the channel floor at a section and its height is gradually increased to reach choked condition in the channel. The depth of water at this section is y2 and that at its upstream section is y1. The correct statement(s) for the choked and unchoked conditions in the channel is/are
A
In choked condition, y1 decreases if the flow is supercritical and increases if the flow is subcritical.
B
In choked condition, y2 is equal to the critical depth if the flow is supercritical or subcritical.
C
In unchoked condition, y1 remains unaffected when the flow is supercritical or subcritical.
D
In choked condition, y1 increases if the flow is supercritical and decreases if the flow is subcritical.

Correct : a;b

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