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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Civil Engineering (CE) MCQ

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test - Test: Principle of Effective Stress, Capillarity & Permeability - 1

Test: Principle of Effective Stress, Capillarity & Permeability - 1 for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Test: Principle of Effective Stress, Capillarity & Permeability - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Principle of Effective Stress, Capillarity & Permeability - 1 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Principle of Effective Stress, Capillarity & Permeability - 1 below.
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Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 1
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In a falling head permeability test on a soil, the time taken for the head to fall from h0 to h1 is t. The test is repeated with same initial head h0, the final head h' is noted in time t/2. Which one of the following equations gives the relation between h', h0 and h1?

Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 1

In falling head permeability test,

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 2
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Approximate ratios of the permeabilities of two clean soils having D10 = 0,6 mm and D10 = 0.3 mm respectively is

Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 2

Ratio of permeabilities of the two soils is given by,

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Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 3
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Which one of the following expressions represents the shear strength of soil at point X? Angle of shear resistance of soil is ϕ and symbols γw' γsat' γsub' γdry stand for unit weights of water, saturated soil, submerged soil and dry soil respectively.

Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 3

As the free water surface on both sides is same so there is no flow occurring through soil. Thus effective stress at X,
σ' = γwH1 + γsatH - γw(H + H1) = γsubH
∴ Shear strength, τ = σ' tanϕ = γsub H tan ϕ

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 4
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A stratified soil deposit has three layers of thicknesses: z1 = 4, z2 - 1, z3 = 2 units and the corresponding permeabilities of k1 = 2, k2 = 1 and k3 = 4 units, respectively. The average permeability perpendicular to the bedding planes will be
Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 4

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 5
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In the case of stratified soil layers, the best equation that can be adopted for computing the pressure distribution is
Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 5

Westergaard’s equation is applicable for non-isotropic condition commonly encountered in sedimentary stratified deposits.

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 6
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The permeability of a soil sample varies (Where d = grain size)
Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 7
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In the situation shown in the given figure, the coefficient of permeability of the soil is 10-3cm/s. The discharge in one minute will be
Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 7

Discharge = Permeability x Area x Head/ Length = 10-3 x 100 x (1/2) = 1/20 cm3/s
Therefore, volume flown in 1 minute = 60 seconds
= 60/20 cm3  = 3 cm3 = 3ml

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 8
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Effective stress in a soil is the stress carried by the
Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 8

Effective stress is a function of the particle contact force.
Pore water pressure acts uniformly on all sides of the particle and does not cause the soil particles to press against each other.

Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 9
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The coefficient of permeability increases when
Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 10
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Which of the following methods is best suited for the determination of permeability of coarse grained soils?
Detailed Solution for Test: Principle of Effective Stress, Capillarity & Permeability - 1 - Question 10

Coarse Grained Soil- Constant Head Method
Fine Grained Soil- Falling Head Method

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