Which of the following soils has the least permeability?

What does the term "soil compaction" refer to in soil mechanics?

A. Increasing water content

B. Decreasing porosity by mechanical means

C. Increasing organic content

D. Increasing permeability

The Atterberg limits are used to describe:

A. Strength of rocks

B. Soil permeability

C. Consistency of fine-grained soils

D. Bearing capacity of soil

The effective stress principle in soil mechanics was proposed by:

A. Boussinesq

B. Terzaghi

C. Darcy

D. Casagrande

Which soil property primarily influences the rate of consolidation?

A. Shear strength

B. Permeability

C. Dry density

D. Specific gravity