# Soil Mechanics Important questions (Unit Wise) Anna University

Soil Mechanics comes under civil engineering (2nd year 4th semester). The important question for Soil Mechanics are given below. If you want to score good marks in university exams you have learn all the formulas.These questions are repeatedly asked in Anna university examinations. Try to study complete questions

Unit 5

2 Marks

• What are the various slope protection measures
• Define factor of safety
• Finite slope.
• infinite slope.
• Types of slopes.
• Causes for slope failure.
• Critical depth.
• Various slope protection measures.
• Stability number.
• Define tension crack

16 Marks

• Explain various methods to protect slopes from failure.
• Explain friction circle method of stability analysis.
• Taylor’s stability number and stability curves.
• Swedish circle method of stability analysis.
• Explain Bishop’s method of stability analysis.

Unit 4

2 Marks

• Define Failure envelope.
• Define Cohesion.
• Shear strength parameters.
• shear strength
• Define angle of internal friction.
• Mohr-Coulomb equation.
• Define stress path.
• How will you determine and cohesion and angle of internal friction from stress path method?
• Distinguish between major principle stress, minor principle stress, cohesion and angle of internal friction.
• Types of triaxial test based on drainage conditions.
• Disadvantages of direct shear test.
• What are the methods of determination of shear strength in the laboratory.

16 Marks

• Explain in detail about the stress path method of determination of shear strength parameters.
• Explain in detail about the shear strength behavior of cohesive and cohesionless soils under different drainage condition in a triaxial test.
• Determination of shear strength using direct shear test.
• Determination of shear strength using unconfined compression test.
• Determination of shear strength using triaxial shear test.
• Explain Determination of shear strength using vane shear test.

Unit 3

2 Marks

• Define creep.
• What is Overconsolidation ratio.
• What are the factors influencing consolidation.
• Components of settlement.
• Define geostatic stress.
• Applications of Boussinesq equation.
• Define pressure bulb.
• Equation for stress in soil due to a line load.
• Define Newmark’s Chart.
• Equation for stress in soil due to a uniformly loaded circular area.
• What is Consolidation.
• What is compression index.
• What is co-efficient of compressibility.
• Westergaard’s equation for stress beneath a concentrated point load.
• Define pre-consolidation pressure.
• Differentiate consolidation and compaction.

16 Marks.

• Principle of Newmark’s Chart.
• Applications of Boussinesq theory.
• Derive the equation for Terzhaghi’s one-dimensional consolidation.
• Explain the concept of consolidation using Terzaghi’s mechanical model..
• Explain laboratory determination of co-efficeint of consolidation.

Unit 2

2 Marks

• What is Flow net.
• Define velocity potential and stream function.
• Define permeability.
• What are the methods available for determination of permeability in the laboratory.
• Factors affecting permeability.
• What is Capillarity.
• Classify the types of soil water.
• Capillary siphoning.
• What is soil water.
• Explain the concept of effective stress.
• Define neutral stress.
• Darcy’s Law.
• Discharge and seepage velocity.
• Methods for determination of permeability in the field.
• Seepage pressure.
• Define quick sand condition.

16 Marks

• What are the Procedure for drawing the phreatic line for an earthen dam.
• Properties and applications of flow nets.
• Laplace equation for two-dimensional flow.
• Explain laboratory determination of permeability using constant head method.
• Explain laboratory determination of permeability using falling head method.

Unit 1

2 Marks

• What is compaction.
• Major soil classifications as per Indian Standard Classification System.
• Function of A-line Chart in soil classification.
• Methods available for determination of in-situ density.
• What is Soil Mechanics.
• Water content.
• What is Unit weight of soil.
• Phase diagram of soil.
• Degree of saturation.
• Specific gravity.
• Density index.
• Types of gradations of soil.
• What do you understand from uniformly graded soil.
• Differentiate standard proctor from modified proctor test.
• Shrinkage ratio.

16  Marks

• Factors affecting compaction.
• Explain procedure for determination of grain size distribution of soil by sieve analysis.
• Explain Indian standards classification system.
• Describe in detail the procedure for determination of shrinkage limit of soil.
• Explain the procedure for determination of liquid limit of soil.

#### Maneksh M S

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