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The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.
S1: Consolidation is a function of total stress
S2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.
S3: For a fully saturated soil the pore pressure parameter is equal to zero.
S4 : Terzaghi's theory of consolidation considers only primary consolidation.
Which of the above statement(s) is /are incorrect?
S1: Consolidation is a function of total stress
S2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.
S3: For a fully saturated soil the pore pressure parameter is equal to zero.
S4 : Terzaghi's theory of consolidation considers only primary consolidation.
Which of the above statement(s) is /are incorrect?
- a)S2 and S4
- b)S4 only
- c)S1 and S3
- d)S2 only
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
The following Four statements (S1, S2, S3, S4) in connection with soil...
S1: False
The expulsion of pore water by applying a steady load for a long time from a fully saturated soil sample is called Primary Consolidation or simply consolidation. It is completed when all the excess pore water gets expelled from the soil and it is time taking phenomenon.
As per Terzaghi's one-dimensional theory of consolidation, primary consolidation is a function of effective stress only and it is independent of total stress.
S2: True
The higher the specific surface area, the higher will be the friction so water will not flow easily, and hence, low will be permeability. Therefore, the Permeability of Coarse-grained or even fine-grained soil is inversely proportional to the specific surface area at a given porosity.
S3: False
Skempton's Pore Pressure coefficients are A and B, Where A depends upon the degree of saturation and over consolidation ratio and B depends upon the degree of saturation of the soil.
In general, A < 1 and B < 1. However, for over-consolidated soil the value of A < 0 and for fully saturated soil, the value of B is 1.
S4: True
Terzaghi's one-dimensional theory of consolidation considered only primary consolidation. Even after complete dissipation of excess pore pressure, the soil undergoes a little more consolidation due to plastic rearrangement of soil solids which is called secondary consolidation.
The expulsion of pore water by applying a steady load for a long time from a fully saturated soil sample is called Primary Consolidation or simply consolidation. It is completed when all the excess pore water gets expelled from the soil and it is time taking phenomenon.
As per Terzaghi's one-dimensional theory of consolidation, primary consolidation is a function of effective stress only and it is independent of total stress.
S2: True
The higher the specific surface area, the higher will be the friction so water will not flow easily, and hence, low will be permeability. Therefore, the Permeability of Coarse-grained or even fine-grained soil is inversely proportional to the specific surface area at a given porosity.
S3: False
Skempton's Pore Pressure coefficients are A and B, Where A depends upon the degree of saturation and over consolidation ratio and B depends upon the degree of saturation of the soil.
In general, A < 1 and B < 1. However, for over-consolidated soil the value of A < 0 and for fully saturated soil, the value of B is 1.
S4: True
Terzaghi's one-dimensional theory of consolidation considered only primary consolidation. Even after complete dissipation of excess pore pressure, the soil undergoes a little more consolidation due to plastic rearrangement of soil solids which is called secondary consolidation.
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The following Four statements (S1, S2, S3, S4) in connection with soil...
Consolidation is a fundamental concept in soil mechanics that refers to the process by which soils gradually compact under the application of external loads. It is a time-dependent process that occurs due to the drainage of water from the soil pores.
S1: Consolidation is a function of total stress
This statement is correct. Consolidation is primarily governed by the total stress applied to the soil. As the load is applied, water is squeezed out of the soil, and the soil particles rearrange themselves, resulting in volume reduction and settlement. The rate of consolidation depends on the magnitude and duration of the applied stress.
S2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity
This statement is incorrect. Permeability is determined by the interconnectedness of void spaces in the soil. Coarse-grained soils, such as sands and gravels, generally have larger void spaces compared to fine-grained soils. Therefore, they tend to have higher permeability. The specific surface area, which is a measure of the soil particles' total surface area per unit volume, is not directly related to permeability.
S3: For a fully saturated soil, the pore pressure parameter is equal to zero
This statement is incorrect. In a fully saturated soil, all the void spaces are filled with water. The pore pressure is the pressure exerted by the water within the soil pores. In a fully saturated condition, the pore pressure is not zero but rather equal to the hydrostatic pressure of the water.
S4: Terzaghi's theory of consolidation considers only primary consolidation
This statement is correct. Terzaghi's theory of consolidation, also known as one-dimensional consolidation theory, focuses on the primary consolidation of soils. Primary consolidation occurs due to the dissipation of excess pore water pressure in the soil. Terzaghi's theory does not consider secondary consolidation, which is a slower and long-term process involving the rearrangement of soil particles.
In summary, the incorrect statements are S2 and S3.
S1: Consolidation is a function of total stress
This statement is correct. Consolidation is primarily governed by the total stress applied to the soil. As the load is applied, water is squeezed out of the soil, and the soil particles rearrange themselves, resulting in volume reduction and settlement. The rate of consolidation depends on the magnitude and duration of the applied stress.
S2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity
This statement is incorrect. Permeability is determined by the interconnectedness of void spaces in the soil. Coarse-grained soils, such as sands and gravels, generally have larger void spaces compared to fine-grained soils. Therefore, they tend to have higher permeability. The specific surface area, which is a measure of the soil particles' total surface area per unit volume, is not directly related to permeability.
S3: For a fully saturated soil, the pore pressure parameter is equal to zero
This statement is incorrect. In a fully saturated soil, all the void spaces are filled with water. The pore pressure is the pressure exerted by the water within the soil pores. In a fully saturated condition, the pore pressure is not zero but rather equal to the hydrostatic pressure of the water.
S4: Terzaghi's theory of consolidation considers only primary consolidation
This statement is correct. Terzaghi's theory of consolidation, also known as one-dimensional consolidation theory, focuses on the primary consolidation of soils. Primary consolidation occurs due to the dissipation of excess pore water pressure in the soil. Terzaghi's theory does not consider secondary consolidation, which is a slower and long-term process involving the rearrangement of soil particles.
In summary, the incorrect statements are S2 and S3.
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The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer?
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The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer?.
The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The following Four statements (S1, S2, S3, S4) in connection with soil behaviour are given.S1: Consolidation is a function of total stressS2: Permeability of Coarse grained soil is inversely proportional to the specific surface at a given porosity.S3: For a fully saturated soil the pore pressure parameter is equal to zero.S4 : Terzaghis theory of consolidation considers only primary consolidation.Which of the above statement(s) is /are incorrect?a)S2 and S4b)S4 onlyc)S1 and S3d)S2 onlyCorrect answer is option 'C'. Can you explain this answer?.
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