Soil Mechanics and Foundation Engineering

201. The angle of internal friction of clays, is usually

  1. 0° to 5°
  2. 5° to 20°
  3. 20° to 30°
  4. 30° to 45°

Correct answer: (B)
5° to 20°

202. The angle of internal friction, is least for

  1. Angular-grained loose sand
  2. Angular -grained dense sand
  3. Round-grained loose sand
  4. Clays

Correct answer: (D)
Clays

203. The angle that Coulomb's failure envelope makes with the horizontal is called

  1. Cohesion
  2. Angle of internal friction
  3. Angle of repose
  4. None of the above

Correct answer: (A)
Cohesion

204. The area of cross-section 'A' at failure or during any stage of Triaxial Compression Test and its initial length (L) and volume (V), are related by the equation

  1. A = (V + ΔV)/(L - ΔL)
  2. A = (V - ΔV)/(V + ΔL)
  3. A = (V - ΔV)/(L - ΔL)
  4. A = (V + ΔV)/(L + ΔL)

Correct answer: (C)
A = (V - ΔV)/(L - ΔL)

205. The average coefficient of permeability of natural deposits

  1. Parallel to stratification is always greater than that perpendicular to stratification
  2. Parallel to stratification is always less than that perpendicular to stratification
  3. Is always same in both directions
  4. Parallel to stratification may or may not be greater than that perpendicular to stratification

Correct answer: (A)
Parallel to stratification is always greater than that perpendicular to stratification

206. The bearing capacity of a soil depends upon

  1. Size of the particles
  2. Shape of the particles
  3. Cohesive properties of particles
  4. All the above

Correct answer: (D)
All the above

207. The capillary rise of water

  1. Depends upon the force responsible
  2. Increases as the size of the soil particles increases
  3. Decreases as the size of the soil particles decreases
  4. Is less in wet soil than in dry soil

Correct answer: (A)
Depends upon the force responsible

208. The change of moisture content of soils, changes the

  1. Value of the angle of repose
  2. Amount of compaction required
  3. Cohesive strength of soil
  4. All the above

Correct answer: (D)
All the above

209. The clay mineral with the largest swelling and shrinkage characteristics is

  1. Kaolinite
  2. Illite
  3. Montmorillonite
  4. None of the above

Correct answer: (C)
None of the above

210. The clay soil mainly consists of

  1. Kaolinite
  2. Montmorillonite
  3. Vermiculite
  4. All the above

Correct answer: (D)
All the above

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