GATE Civil Engineering (CE) 2022 Shift 2 Solved Paper

Question : 47 of 65

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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 y₂and that at its upstream section is y₁ . The correct statement(s) for the choked and unchoked conditions in the channel is/are

In choked condition, y₁ decreases if the flow is supercritical and increases if the flow is subcritical
In choked condition, y₂ is equal to the critical depth if the flow is supercritical or subcritical
In unchoked condition, y1 remains unaffected when the flow is supercritical or subcritical
In choked condition, y₁ increases if the flow is supercritical and decreases if the flow is subcritical

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