Soil Mechanics and Foundation Engineering

101. Fundamental relationship between dry density (γd), specific gravity (G), water content (ω) and percentage of air voids (na) is:

  1. γd = (1 - na) G γω(1 + ωG)
  2. γd = (1 + na) G γω(1 + ωG)
  3. γd = (1 + na) G γω(1 - ωG)
  4. γd = (1 - na) G γω(1 - ωG)

Correct answer: (A)
γd = (1 - na) G γω(1 + ωG)

102. Geologic cycle for the formation of soil, is

  1. Upheavel → transportation → deposition → weathring
  2. Weathering → upheavel → transportation → deposition
  3. Transportation → upheavel → weathring → deposition
  4. Weathring → transportation → deposition → upheavel

Correct answer: (D)
Weathring → transportation → deposition → upheavel

103. Highway Research Board (HRB) classification of soils is based on

  1. Particle size composition
  2. Plasticity characteristics
  3. Both particle size composition and plasticity characteristics
  4. None of the above

Correct answer: (C)
None of the above

104. Hydrometer readings are corrected for:

  1. Temperature correction
  2. Meniscus correction
  3. Dispersing agent correction
  4. Temperature, meniscus and dispersing agent corrections

Correct answer: (D)
Temperature, meniscus and dispersing agent corrections

105. If σ0 e0 and e void ratios corresponding to initial and increased pressure ; and C0 the compression index (dimensionless), then, the virgin

  1. e = e0 + Cc log10 / 0'
  2. e = e0 - Cc log10 / 0'
  3. e0 = e - Cc log10 / 0'
  4. e0 = e + Cc log10 / 0'

Correct answer: (B)
e = e0 - Cc log10 / 0'

106. If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is

  1. 90°
  2. 45°
  3. 22.5°
  4. 0°

Correct answer: (B)
45°

107. If a soil undergoes a change in shape and volume by application of external loads over it, but recovers its shape and volume immediately after removal of the load, the property of the soil is said to be

  1. Resilience of soils
  2. Elasticity of soils
  3. Compressibility of soils
  4. None of these

Correct answer: (B)
Elasticity of soils

108. If 'C' is cohesion, 'F' is factor of safety, 'Y' is unit weight of soil and 'H'C is the maximum height of embankment, the stability number, is

  1. F/
  2. C/
  3. H/
  4. /CFH

Correct answer: (B)
C/

109. If Cv is the coefficient of consolidation, 't' is the time and 'd'is drainage path of one dimensional consolidation of soil, the time factor Tv, is given by

  1. Tv = d2/Cvt
  2. Tv = t2/d2Cv
  3. Tv = Cv3/d2t
  4. Tv = Cvt/dt2

Correct answer: (D)
Tv = Cvt/dt2

110. If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as

  1. Quick test
  2. Drained test
  3. Consolidated undrained test
  4. None of these

Correct answer: (B)
Drained test

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