Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is

Soil Mechanics and Foundation
Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is

24 months

12 months

3 months

6 months

24 months

12 months

3 months

6 months

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Soil Mechanics and Foundation
A tri-axial shear test is preferred to direct shear test, because

Stress distribution on the failure plane, is non uniform

It can be performed under all three drainage conditions with complete control

Precise measurement of pore pressure and change in volume during test, is not possible

None of these

Stress distribution on the failure plane, is non uniform

It can be performed under all three drainage conditions with complete control

Precise measurement of pore pressure and change in volume during test, is not possible

None of these

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Soil Mechanics and Foundation
The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

1.0m

1.5m

3m

2.0m

1.0m

1.5m

3m

2.0m

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Soil Mechanics and Foundation
The clay mineral with the largest swelling and shrinkage characteristics is

kaolinite

montmorillonite

illite

None of these

kaolinite

montmorillonite

illite

None of these

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Soil Mechanics and Foundation
When the degree of saturation is zero, the soil mass under consideration represents

two phase system with soil and water

one phase system

two phase system with soil and air

three phase system

two phase system with soil and water

one phase system

two phase system with soil and air

three phase system

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Soil Mechanics and Foundation
During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is

-0.5

-2

2

0.5

-0.5

-2

2

0.5

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Soil Mechanics and Foundation

Soil Mechanics and Foundation A tri-axial shear test is preferred to direct shear test, because

Soil Mechanics and Foundation The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

Soil Mechanics and Foundation The clay mineral with the largest swelling and shrinkage characteristics is

Soil Mechanics and Foundation When the degree of saturation is zero, the soil mass under consideration represents

Soil Mechanics and Foundation During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is

Soil Mechanics and Foundation
A tri-axial shear test is preferred to direct shear test, because

Soil Mechanics and Foundation
The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

Soil Mechanics and Foundation
The clay mineral with the largest swelling and shrinkage characteristics is

Soil Mechanics and Foundation
When the degree of saturation is zero, the soil mass under consideration represents

Soil Mechanics and Foundation
During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is