Soil Mechanics and Foundation Engineering

231. The fluid generally used for grouting is

  1. Cement and water mix
  2. Clay suspension
  3. Sodium silicate
  4. All the above

Correct answer: (D)
All the above

232. The fundamental equation of air content (ac), degree of saturation (Sr) and void ratio (e), is

  1. ac = e (1 - Sr)/(1 - e)
  2. ac = e (1 + Sr)/(1 + e)
  3. ac = e (1 - Sr)/(1 + e)
  4. ac = e (1 + Sr)/(1 - e)

Correct answer: (C)
ac = e (1 - Sr)/(1 + e)

233. The fundamental equation of specific gravity (G), dry density (γd), unit weight of water γω) and void ratio (e), is

  1. e = Gγω /(1 + γd)
  2. G = γd/ γω(1 + e)
  3. γ = G. γω/(1 + e)
  4. γω = G. γd/(1 + e)

Correct answer: (C)
γ = G. γω/(1 + e)

234. The general relationship between specific gravity (G), weight of water (γω), degree of saturation (Sr), void ratio (e) and bulk density (γ), is

  1. γ = (S - eSr) γω/(1 + e)
  2. γ = (G + eSr) γω/(1 + e)
  3. γ = (1 + e) γω/(G + Sr)
  4. γ = (1 - Sr) e/(G + Sr)

Correct answer: (B)
γ = (G + eSr) γω/(1 + e)

235. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

  1. 1.0 m
  2. 1.5 m
  3. 2.0 m
  4. 3 m

Correct answer: (B)
1.5 m

236. The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in

  1. The principle of test
  2. The method of taking observations
  3. The method of preparation of soil suspension
  4. All of the above

Correct answer: (B)
The method of taking observations

237. The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3, is

  1. 4 t/m2
  2. 5 t/m2
  3. 6 t/m2
  4. 7 t/m2

Correct answer: (C)
6 t/m2

238. The intensity of vertical pressure at a depth 'Z' directly below the point load 'Q' on its axis of loading is:

  1. 0.4775 Q/Z
  2. 0.4775 Q/Z2
  3. 0.4775 Q/Z3
  4. 0.4775 Q Z

Correct answer: (B)
0.4775 Q/Z2

239. The internal molecular attraction of a soil, the cohesion

  1. Decreases as the moisture content increases
  2. Increases as the moisture content decreases
  3. Is more in well compacted clays
  4. Depends upon the external applied load

Correct answer: (C)
Is more in well compacted clays

240. The inventor of the term soil mechanics, was

  1. Kray
  2. Dr. Karl Terzaghi
  3. Leygue
  4. Fellenius

Correct answer: (B)
Dr. Karl Terzaghi

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