GATE 2022 Civil Engineering PYQ

Question

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 statements for the chocked and un-chocked conditions in the channel is/are

Accepted Answer

In chocked condition, y₂ is equal to the critical depth if the flow is supercritical or sub critical.

Answer

In chocked condition, decreases if the flow is supercritical and increases if the flow is subcritical.

Answer

In un-chocked condition, y₁ remain unaffected when the flow is supercritical or subcritical.

Answer

In chocked conditions, y₁ increases if the flow is supercritical and decreases if the flow is subcritical.