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1
GATE CE 2022 Set 2
MCQ (More than One Correct Answer)
+1
-0.33

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

A
In chocked condition, y2 is equal to the critical depth if the flow is supercritical or sub critical.
B
In chocked condition, decreases if the flow is supercritical and increases if the flow is subcritical.
C
In un-chocked condition, y1 remain unaffected when the flow is supercritical or subcritical.
D
In chocked conditions, y1 increases if the flow is supercritical and decreases if the flow is subcritical.
2
GATE CE 2022 Set 1
MCQ (Single Correct Answer)
+1
-0.33

A rectangular channel with Gradually Varied Flow (GVF) has a changing bed slope. If the change is from a steeper slope to a steep slope, the resulting GVF profile is

A
S3
B
S1
C
S2
D
either S1 or S2, depending on the magnitude of the slopes
3
GATE CE 2022 Set 1
Numerical
+1
-0.33

Depth of water flowing in a 3 m wide rectangular channel is 2 m. The channel carries a discharge of 12 m3/s. Take g = 9.8 m/s2. The bed width (in m) at contraction, which just causes the critical flow, is _________ without changing the upstream water level. (round off to two decimal places)

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