Soil Mechanics and Foundation Engineering

Soil Mechanics and Foundation Engineering

A. Unit weight of dry soil is greater than unit weight of wet soil
B. For dry soils, dry unit weight is less than total unit weight
C. Unit weight of soil increases due to submergence in water
D. Unit weight of soil decreases due to submergence in water

A. Uniformity coefficient represents the shape of the particle size distribution curve
B. For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity
C. A soil is said to be well graded if it has most of the particles of about the same size
D. none of the above

A. A uniform soil has more strength and stability than a non-uniform soil
B. A uniform soil has less strength and stability than a non-uniform soil
C. Uniformity coefficient does not affect strength and stability
D. Uniformity coefficient of a poorly graded soil is more than that of a well graded soil

A. The greater the viscosity, the greater is permeability
B. The greater the unit weight, the greater is permeability
C. The greater the unit weight, the smaller is permeability
D. Unit weight does not affect per-meability

A. coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
B. coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
C. coefficient of compressibility is cons-tant for any clay
D. none of the above

A. Effective cohesion of a soil can never have a negative value
B. Effective angle of internal friction for coarse grained soils is rarely below 30°
C. Effective angle of internal friction for a soil increases as state of compact-ness increases
D. Effective angle of internal friction is a complicated function of mineralogy and clay size content

A. decreases
B. increases
C. remains unchanged
D. first increases and then decreases

Effective angle of shearing resistance
A. increases as the size of particles increases
B. increases as the soil gradation im-proves
C. is limited to a maximum value of 45°
D. is rarely more than 30° for fine grained soil

A. In a direct shear box test, the plane of shear failure is predetermined
B. Better control is achieved on the drainage of the soil in a triaxial compression test
C. Stress distribution on the failure plane in the case of triaxial compression test is uniform
D. Unconfined compression test can be carried out on all types of soils