True or False ?? 1. Sands and gravels rarely exhibit angle of internal friction,
ID: 1740736 • Letter: T
Question
True or False ??
1. Sands and gravels rarely exhibit angle of internal friction, ?’ less than 30°. T F
2.
The stress versus strain relationship of an overconsolidated clay is similar to that of a loose sand.
T
F
3.
Negative pore-water pressures can be generated in overconsolidated clays when they are subjected to shearing process in a triaxial test apparatus under undrained loading conditions.
T
F
4.
Direct shear test apparatus is only useful for reliably determining the effective shear strength parameters, c’ and ?’ of a soil.
T
F
5. The consolidated undrained triaxial (CU) test result with pore-water pressure measurement can be used to estimate both effective and total stress shear strength parameters.
T
F
6.
For heavily overconsolidated clays, the swelling index (Cs) can be greater than the compression index (Cc).
T
F
True or False ??
1. Sands and gravels rarely exhibit angle of internal friction, ?’ less than 30°. T F
2.
The stress versus strain relationship of an overconsolidated clay is similar to that of a loose sand.
T
F
3.
Negative pore-water pressures can be generated in overconsolidated clays when they are subjected to shearing process in a triaxial test apparatus under undrained loading conditions.
T
F
4.
Direct shear test apparatus is only useful for reliably determining the effective shear strength parameters, c’ and ?’ of a soil.
T
F
5. The consolidated undrained triaxial (CU) test result with pore-water pressure measurement can be used to estimate both effective and total stress shear strength parameters.
T
F
6.
For heavily overconsolidated clays, the swelling index (Cs) can be greater than the compression index (Cc).
T
F
Explanation / Answer
1. True
2. False (Overconsolidated soil means it already consolodated . Therefore stress- strain graph is different from the normally consolidated soil(eg. loose sand)
3. True(Negative pore pressure will be developed for OCC(Overconsolidated Clay)---Undrained loading conditions)
4. False(Direct shear test useful for cohesionless soils......From this test we get friction angle and cohesion...Not effective friction angle and cohesion)
5.True
6. No clear idea....May be above statement is True
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