Void Ratio MCQ – Geotechnical Engineering

51. The void ratio at the densest, loosest and the natural states of a sand deposit are 0.2, 0.6 and 0.4 respectively. Relative density for this deposit will be

  1. 80%
  2. 90%
  3. 25 %
  4. 50%
Answer
Answer. d

52. For a sandy soil, the maximum and minimum voids ratio are respectively 0.75 and 0.40. If the existing voids ratio is 0.65, then the relative density of this soil would approximately be

  1. 0.5
  2. 0.6
  3. 0.9
  4. 0.3
Answer
Answer. d

53. The voids ratio of a cohesionless soil sample in its loosest state is 1, while in its densest state it is 0.5. If the natural voids ratio of the deposit is 0.6, then the degree of density of the soil is

  1. 0.8
  2. 0.6
  3. 1
  4. 0.5
Answer
Answer. a

54. Density index of soil is denoted by

emax – max. void ratio
emin – min. void ratio
e – natural void ratio

  1. (emax – e)/(emax – emin)
  2. (e – emax)/(emax – emin)
  3. (emax + e)/(emax – emin)
  4. (e + emax)/(emax – emin)
Answer
Answer. a

55. A soil has a bulk density of 17.6 kN/m3 and water content 10%. If void ratio remains constant then the bulk density for water content of 20% will be

  1. 19.20 kN/m3
  2. 16.13 kN/m3
  3. 17.6 kN/m3
  4. 19.36 kN/m3
Answer
Answer. a

56. The specifñc gravity of a soil sample is 2.7 and its void ratio is 0.945. When it is fully saturated, moisture content of the soil will be

  1. 28%
  2. 25.5%
  3. 35%
  4. 95%
Answer
Answer. c

57. A soil of bulk density of 1.8 gm/cm3 at a water content of 5%. If the void ratio remais constant, then the bulk density for a water content of 10% will be

  1. 0.80 gm/cm3
  2. 1.98 gm/cm3
  3. 0.70 gm/cm3
  4. 1.88 gm/cm3
Answer
Answer. d

58. A soil sample having a void ratio of 1.3, water content of 50% and a specific gravity of 2.60, is a state of

  1. Partial saturation
  2. Full saturation
  3. Over saturation
  4. Under saturation
Answer
Answer. b

59. A clay sample has a void ratio of 0.50 in dry state and specific gravity of solids is 2.70. Its shrinkage limit will be

  1. 13.5%
  2. 12%
  3. 22.0%
  4. 18.5%
Answer
Answer. d

60. A saturated undisturbed sample from a clay strata has moisture content of 22.22% and specific weight of 2.7. Assuming γw = 10 kN/m3, the void ratio and the saturated unit weight of the clay, respectively are

  1. 0.6 and 16.875 kN/m3
  2. 0.3 and 20.625 kN/m3
  3. 0.6 and 20.625 kN/m3
  4. 0.3 and 16.975 kN/m3
Answer
Answer. c
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