Soil Mechanics and Foundation Engineering

241. The lateral earth pressure on a retaining wall

  1. Is equal to mass of the soil retained
  2. Proportional to the depth of the soil
  3. Proportional to the square of the depth of the soil
  4. Proportional to the internal friction of the soil

Correct answer: (D)
Proportional to the internal friction of the soil

242. The length/diameter ratio of cylindrical specimens used in triaxial test, is generally

  1. 1
  2. 1.5
  3. 2
  4. 2.5

Correct answer: (C)
2

243. The liquid limit and plastic limit exist in

  1. Sandy soils
  2. Silty soils
  3. Gravel soils
  4. Clay soils

Correct answer: (D)
Clay soils

244. The liquidity index is defined as a ratio expressed as percentage of

  1. Plastic limit minus the natural water content, to its plasticity index
  2. Natural water content minus its plastic limit to its plasticity index
  3. Natural water content plus its plastic limit to its plasticity index
  4. Liquid limit minus the natural water content to the plasticity index

Correct answer: (B)
Natural water content minus its plastic limit to its plasticity index

245. The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

  1. Vertical if the soil is in an active state of plastic equilibrium
  2. Vertical if the soil is in a passive state of plastic equilibrium
  3. Inclined at 45° to the vertical plane
  4. None of the above

Correct answer: (A)
Vertical if the soil is in an active state of plastic equilibrium

246. The maximum dry density upto which any soil can be compacted depends upon

  1. Moisture content only
  2. Amount of compaction energy only
  3. Both moisture content and amount of compaction energy
  4. None of the above

Correct answer: (C)
Both moisture content and amount of compaction energy

247. The maximum load carried by a pile, when it continues to sink without further increase of load, is known as

  1. Ultimate load carrying capacity
  2. Ultimate bearing capacity
  3. Ultimate bearing resistant
  4. All the above

Correct answer: (D)
All the above

248. The maximum net pressure intensity causing shear failure of soil, is known

  1. Safe bearing capacity
  2. Net safe bearing capacity
  3. Net ultimate bearing capacity
  4. Ultimate bearing capacity

Correct answer: (C)
Net ultimate bearing capacity

249. The maximum pressure which a soil can carry without shear failure, is called

  1. Safe bearing capacity
  2. Net safe bearing capacity
  3. Net ultimate bearing capacity
  4. Ultimate bearing capacity

Correct answer: (A)
Safe bearing capacity

250. The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to

  1. 30°
  2. 45°
  3. 60°
  4. 90°

Correct answer: (B)
45°

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