GATE CE concept:gradually-varied-flow PYQs & Answers

Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.

Gradually Varied Flow (GVF) profiles in open channels given in Column 1 are to be matched with the water surface slopes in Column 2 in the table below.

Column 1: GVF Profile — (P) M1; (Q) M2; (R) M3 Column 2: Water Surface Slope — (I) Positive; (II) Negative; (III) Zero

Which of the following options is/are NOT correct?

Your answerSelect all correct options. You can choose more than one.

(P) – (I) ; (Q) – (II) ; (R) – (I)

(P) – (I) ; (Q) – (II) ; (R) – (III)

(P) – (II) ; (Q) – (I) ; (R) – (I)

(P) – (I) ; (Q) – (III) ; (R) – (II)

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

Your answerChoose one option.

S₃

S₁

S₂

either S₁ or S₂, depending on the magnitude of the slopes

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A 1 m wide rectangular channel has a bed slope of 0.0016 and the Manning’s roughness coefficient is 0.04. Uniform flow takes place in the channel at a flow depth of 0.5 m. At a particular section, gradually varied flow (GVF) is observed and the flow depth is measured as 0.6 m. The GVF profile at that section is classified as

Your answerChoose one option.

S₁

S₂

M₁

M₂

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GATE CE concept:gradually-varied-flow PYQs

How to practice concept:gradually-varied-flow

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