GATE CE concept:flow-nets PYQs & Answers

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concept:flow-nets

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Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.

Topic practice 4 questionsPage 1 of 1

From a flow-net diagram drawn under a concrete dam, following information are obtained: (i) The head difference between upstream and downstream side of the dam is 9 m. (ii) The total number of equipotential drops between upstream and downstream side of the dam is 10. (iii) The length of the field nearest to the toe of the dam in the downstream side is 1 m.

If the soil below the dam is having a saturated unit weight of 21 kN/m

and unit weight of water is 9.81 kN/m

, then the factor of safety against the quick condition will be _____ (round off to two decimal places).

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A vertical sheet pile wall is installed in an anisotropic soil having coefficient of horizontal permeability,

and coefficient of vertical permeability,

. In order to draw the flow net for the isotropic condition, the embedment depth of the wall should be scaled by a factor of _____, without changing the horizontal scale.

Your answerChoose one option.

1.0

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An anisotropic soil deposit has coefficient of permeability in vertical and horizontal directions as

and

, respectively. For constructing a flow net, the horizontal dimension of the problem’s geometry is transformed by a multiplying factor of

Your answerChoose one option.

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A sheet pile has an embedment depth of 12 m in a homogeneous soil stratum. The coefficient of permeability of soil is

m/s. Difference in the water levels between the two sides of the sheet pile is 4 m. The flow net is constructed with five number of flow lines and eleven number of equipotential lines. The quantity of seepage (in cm

/s per m, up to one decimal place) under the sheet pile is ________.

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GATE CE concept:flow-nets PYQs

How to practice concept:flow-nets

Question 31

Question 19

Question 17

Question 21