Geomech general quiz

A slope is constituted by sand, having resistance given by the shear strength angle ϕ’ (null cohesion). If the soil is dry and there are no loads acting on the slope, which is the maximum inclination the slope can have?

• 0.5 ϕ’

• 0.66 ϕ’

• ϕ’

• 1.5 ϕ’

If you were building your dream house, where would you choose to build it?

• On a normally consolidated clay layer

• On a highly overconsolidated clay layer

A geomaterial can be characterized by...

• solid particles, gas

• solid particles, water, gas

• solid particles, water

In which conditions Terzaghi’s effective stress is valid? (multiple choice)

• Fully saturated granular material

• Partially saturated granular material

• Incompressible fluid

• Compressible fluid

• Incompressible grains

Stress Invariants…

• Are independent from the coordinate system selected

• Are functions of the principal stresses

• All the propositions above

• None of the proposition above

How many independent parameters are required to describe an isotropic linear elastic behaviour?

• 1

• 2

• 3

• 4

How many independent parameters are required to describe a cross-anisotropic linear elastic behaviour?

• 3

• 4

• 5

• 6

In small strain non-linear elasticity, the stiffness is independent from the range of strains.

• True

• False

In the small strain theory, compressional and shear wave velocity depends by the density of the material.

• True

• False

Plasticity is always associated with…

• Irreversible deformation

• Failure mechanism

• Both