Test: Seepage Analysis - 2


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8 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Seepage Analysis - 2

Test: Seepage Analysis - 2 for Civil Engineering (CE) 2022 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Seepage Analysis - 2 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Seepage Analysis - 2 MCQs are made for Civil Engineering (CE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Seepage Analysis - 2 below.
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Test: Seepage Analysis - 2 - Question 1

Darcy’s law for flow through soil is valid if Reynold's number is less than

Detailed Solution for Test: Seepage Analysis - 2 - Question 1

Darcy's law is valid if the flow through soil is laminar and Reynolds number is less than 1.

Test: Seepage Analysis - 2 - Question 2

Consider the following statements:
1. Seepage force is applied by flowing water to the soil skeleton through frictional drag.
2. The magnitude of seepage force per unit volume of soil at any point is equal to γw/i, where γw is the unit weight of water and i is the hydraulic gradient at that point.
3. In a soil mass subjected to upward flow of water, quick sand condition develops when pore pressure is equal to the total stress

Which of these statements is/are correct?

Detailed Solution for Test: Seepage Analysis - 2 - Question 2

Seepage force is due to frictional drag and its magnitude is given by iγw per unit volume of soil. For quick condition during upward flow.
Effective stress = total stress - pore pressure So statement 1 and 3 is correct.

*Multiple options can be correct
Test: Seepage Analysis - 2 - Question 3

Which one of the following explains the flow condition occurring within a soil when its effective pressure is reduced to zero?

Detailed Solution for Test: Seepage Analysis - 2 - Question 3

When the seepage of water is upward in a soil layer so much that seepage force decreases the inter particle forces and effective stress is reduced to zero, quick sand condition occurs. Liquefaction of sand is also a phenomenon when effective stress of soil is reduced to zero, it usually occurs when sand deposit is shaken due to an earthquake or any other oscillatory load which increases the pore water pressure.

Test: Seepage Analysis - 2 - Question 4

A soil has a discharge velocity of 6 x 10-7 m/s and a void ratio of 0.5. Its seepage velocity is

Detailed Solution for Test: Seepage Analysis - 2 - Question 4

Test: Seepage Analysis - 2 - Question 5

For an anisotropic soil, permeabilities in x and y directions are Kx and Ky respectively in a two dimensional flow. The effective permeability Keq for the soil is given by

Test: Seepage Analysis - 2 - Question 6

To provide safety against piping failure, with a factor of safety of 5, what should be the maximum permissible exit gradient for soil with specific gravity of 2.5 and porosity of 0.35?

Detailed Solution for Test: Seepage Analysis - 2 - Question 6

∴ Maximum permissible exit gradient,

Test: Seepage Analysis - 2 - Question 7

During seepage through an earth mass, the direction of seepage is

Test: Seepage Analysis - 2 - Question 8

The upstream slope of an earth dam under steady seepage condition is

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