Soil Mechanics and Foundation Engineering

151. Inorganic soils with low compressibility are represented by

  1. MH
  2. SL
  3. ML
  4. CH

Correct answer: (C)
ML

152. Laplacian fundamental equation for a non-compressible flow in three dimensions, is

  1. (δu/δx) + (δv/δy) + (δw/δz) = 0
  2. (δ2h/δx2) + (δ2h/δy2) + (δ2h/δz2) = 0
  3. (δ2φ/δx2) + (δ2φ/δy2) + (δ2φ/δz2) = φ
  4. None of these

Correct answer: (C)
(δ2φ/δx2) + (δ2φ/δy2) + (δ2φ/δz2) = φ

153. 'Loess' is silty clay formed by the action of

  1. Water
  2. Glacier
  3. Wind
  4. Gravitational force

Correct answer: (C)
Wind

154. Maximum size of clay particles is:

  1. 0.002 mm
  2. 0.04 mm
  3. 0.06 mm
  4. 0.08 mm

Correct answer: (A)
0.002 mm

155. Minimum size of the particles of silt soil, is

  1. 0.002 mm
  2. 0.04 mm
  3. 0.06 mm
  4. 0.08 mm

Correct answer: (A)
0.002 mm

156. Negative skin friction on piles

  1. Is caused due to relative settlement of the soil
  2. Is caused in soft clays
  3. Decreases the pile capacity
  4. All of the above

Correct answer: (D)
All of the above

157. Number of piles required to support a column, is

  1. 1
  2. 2
  3. 3
  4. 4

Correct answer: (C)
3

158. On wetting, cohesive soils,

  1. Loose permeability
  2. Gain shear strength
  3. Loose elasticity
  4. Decrease their shear strength

Correct answer: (D)
Decrease their shear strength

159. Over-consolidation of soils is caused due to

  1. Erosion of over burden
  2. Melting of ice sheets after glaciations
  3. Permanent rise of water table
  4. All the above

Correct answer: (D)
All the above

160. Physical properties of a permeant which influence permeability are

  1. Viscosity only
  2. Unit weight only
  3. Both viscosity and unit weight
  4. None of the above

Correct answer: (C)
Both viscosity and unit weight

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