Soil Mechanics and Foundation Engineering

171. Quick sand is a

1. Type of sand
2. Flow condition occurring in cohesive soils
3. Flow condition occurring in cohesion-less soils
4. Flow condition occurring in both cohesive and cohesion-less soils

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172. Rankine's theory of active earth pressure assumes

1. Soil mass is homogeneous, dry and cohesionless
2. Ground surface is a plane which may be horizontal or inclined
3. Back of the wall is vertical and smooth
4. All the above

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173. Rankine's theory of earth pressure assumes that the back of the wall is

1. Plane and smooth
2. Plane and rough
3. Vertical and smooth
4. Vertical and rough

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174. Relative density of a compacted dense sand is approximately equal to

1. 0.4
2. 0.6
3. 0.95
4. 1.2

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175. Residual soils are formed by

1. Glaciers
2. Wind
3. Water
4. None of the above

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176. Rise of water table above the ground surface causes

1. Equal increase in pore water pressure and total stress
2. Equal decrease in pore water pressure and total stress
3. Increase in pore water pressure but decrease in total stress
4. Decrease in pore water pressure but increase in total stress

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177. Rise of water table in cohesion-less soils upto ground surface reduces the net ultimate bearing capacity approximately by

1. 25 %
2. 50 %
3. 75 %
4. 90 %

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178. Sand particles are made of

1. Rock minerals
2. Kaolinite
3. Illite
4. Montmorillonite

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179. Sedimentation analysis is based on the assumption:

1. Soil particles are spherical
2. Particles settle independent of other particles
3. Walls of the jar do not affect the settlement
4. All the above

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180. Select the correct range of density index, ID

1. ID > 0
2. ID < 0
3. 0 < ID < 1
4. 0 < ID < 1

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