Geotechnical Engineering - I

Soil mechanics mainly deals with the study of

1. Steel structures
2. Fluid flow only
3. Behaviour of soils under loads
4. Rock blasting

Void ratio is defined as

1. Volume of solids/volume of voids
2. Total volume/volume of solids
3. Volume of voids/volume of solids
4. Volume of water/volume of air

The water content of soil is commonly determined by

1. Pycnometer method
2. Oven drying method
3. Core cutter method
4. Sand replacement method

Liquid limit of soil is determined using

1. Proctor apparatus
2. Direct shear apparatus
3. Triaxial apparatus
4. Casagrande apparatus

Darcy's law is valid for

1. Turbulent flow
2. Compressible flow
3. Unsteady flow
4. Laminar flow

The coefficient of permeability is expressed in

1. m/s
2. m²/s
3. kg/m³
4. N/m²

Effective stress principle was proposed by

1. Rankine
2. Boussinesq
3. Terzaghi
4. Coulomb

Quick sand condition occurs when

1. Effective stress becomes zero
2. Soil becomes dry
3. Water content becomes zero
4. Unit weight increases

Optimum moisture content is obtained from

1. Consolidation test
2. Permeability test
3. Shear test
4. Compaction test

Newmark's influence chart is used for

1. Soil classification
2. Flow net construction
3. Stress distribution analysis
4. Compaction control

Explain the formation and classification of soils with suitable examples.

Discuss the three-phase system of soil and derive the important phase relationships.

Explain various laboratory methods used for determination of moisture content in soils.

Describe the methods for determination of specific gravity and field density of soils

Explain Atterberg limits and discuss their engineering significance.

Discuss the Indian Standard Soil Classification System with neat illustrations.

Explain Darcy's law and discuss the factors affecting permeability of soils.

Describe constant head and falling head permeability tests with suitable sketches.

Explain capillary action and seepage pressure in soils with engineering applications.

Describe laboratory and field compaction methods used in geotechnical engineering.

Explain the factors affecting compaction and discuss Proctor compaction test.

Discuss stresses in soils due to point load and line load using Boussinesq's theory.

Explain the stress distribution under uniformly loaded circular and rectangular areas.

Discuss Newmark's influence chart and its applications in stress analysis of soils.

Quick Sand Condition

Liquidity Index and Consistency Index

Flow Net Characteristics

Compaction Control in Field