Geotechnical Engineering Test II

30 Questions | Total Attempts: 96

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Geotechnical Engineering Test II

Questions and Answers
  • 1. 
       Which of the following is a measure of particle size range ?
    • A. 

      Effective size

    • B. 

      None of the above

    • C. 

      Coefficient of curvature

    • D. 

      Uniformity coefficient

  • 2. 
    Which of the following statements is correct?
    • 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

  • 3. 
    Uniformity coefficient of a soil is
    • A. 

       always less than 1

    • B. 

        always equal to 1

    • C. 

         equal to or less than 1

    • D. 

      Equal to or greater than 1

  • 4. 
      According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is
    • A. 

      0 < PI < 7

    • B. 

      7<PI<17

    • C. 

      17<PI<27

    • D. 

      PI>27

  • 5. 
    If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in
    • A. 

        liquid state

    • B. 

        plastic state

    • C. 

        semi-solid state

    • D. 

      Solid state

  • 6. 
    When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as
    • A. 

      Negative

    • B. 

      Zero

    • C. 

      Non-plastic

    • D. 

      1

  • 7. 
      Toughness index is defined as the ratio of
    • A. 

        plasticity index to consistency index

    • B. 

        plasticity index to flow index

    • C. 

        liquidity index to flow index

    • D. 

      Consistency index to liquidity index

  • 8. 
      If the plasticity index of a soil mass is zero, the soil is
    • A. 

      Sand

    • B. 

      Salt

    • C. 

      Clay

    • D. 

      Clayey silt

  • 9. 
    The admixture of coarser particles like sand or silt to clay causes
    • A. 

        decrease in liquid limit and increase in plasticity index

    • B. 

        decrease in liquid limit and no change in plasticity index

    • C. 

        decrease in both liquid limit and plasticity index

    • D. 

      Increase in both liquid limit and plasticity index

  • 10. 
      Select the correct statement.
    • 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.

  • 11. 
    The water content of soil, which represents the boundary between plastic state and liquid state, is known as
    • A. 

      Liquid limit

    • B. 

      Plastic limit

    • C. 

      Shrinkage limit

    • D. 

      Plasticity limit

  • 12. 
      Which of the following soils has more plasticity index ?
    • A. 

      Sand

    • B. 

      Silt

    • C. 

      Clay

    • D. 

      Gravel

  • 13. 
      At liquid limit, all soils possess
    • A. 

        same shear strength of small magnitude

    • B. 

        same shear strength of large magnitude

    • C. 

        different shear strengths of small magnitude

    • D. 

      Different shear strengths of large magnitude

  • 14. 
      If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then
    • A. 

        the liquid limit of soil always increases

    • B. 

        the liquid limit of soil always decreases

    • C. 

        the liquid limit of soil may increase

    • D. 

      The liquid limit of soil may decrease

  • 15. 
      According to IS classification, the range of silt size particles is
    • A. 

      4.75 mm to 2.00 mm

    • B. 

      2.00 mm to 0.425 mm

    • C. 

      0.425 mm to 0.075 mm

    • D. 

      0.075 mm to 0.002 mm

  • 16. 
      Highway Research Board (HRB) classification of soils is based on
    • A. 

        particle size composition

    • B. 

        plasticity characteristics

    • C. 

        both particle size composition and plasticity characteristics

    • D. 

      None of the above

  • 17. 
      Inorganic soils with low compressibility are represented by
    • A. 

      MH

    • B. 

      SL

    • C. 

      ML

    • D. 

      CH

  • 18. 
      Sand particles are made of
    • A. 

        rock minerals

    • B. 

        kaolinite

    • C. 

        illite

    • D. 

      Montmorillonite

  • 19. 
      The clay mineral with the largest swelling and shrinkage characteristics is
    • A. 

        kaolinite

    • B. 

        illite

    • C. 

        montmorillonite

    • D. 

      None of the above

  • 20. 
    Unified soil classification system (USCS) was developed by ____________
    • A. 

      Kozney

    • B. 

      Atterberg

    • C. 

      Casagrande

    • D. 

      Rankine

  • 21. 
    According to USCS, the fined grained soil are classified on the basis of _____________
    • A. 

      Plasticity

    • B. 

      Grain size distribution

    • C. 

      Group index

    • D. 

      Particle size composition

  • 22. 
    Fine grained soil are sub divided in to __________
    • A. 

      Silt and clay

    • B. 

      Sand and clay

    • C. 

      Organic and silt

    • D. 

      Gravel and peat

  • 23. 
    In Casagrande’s plasticity chart, the numbers in the chart denotes ___________
    • A. 

      Relative suitability

    • B. 

      Grade of the soil

    • C. 

      Division of the group

    • D. 

      None of the mentioned

  • 24. 
    According to IS classification, the symbol GC means __________
    • A. 

      Clayey gravel

    • B. 

      Silt gravel

    • C. 

      Sand gravel

    • D. 

      Well graded gravel

  • 25. 
    The A-line, in unified classification system table has the equation of _________
    • A. 

      IP=WL-20

    • B. 

      IP=0.73(WL-20)

    • C. 

      IP=0.73(20-wL)

    • D. 

      IP=20-WL

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