Civil Engineering - Geotechnical Engineering

Question - 1

In a soil sample of weight 0.18 kg having a volume of 10-4 m3 and dry unit weight of 1600 kg/m3 is mixed with 0.02 kg of water than the water, content in the sample will be,

  • A 30%
  • B 25%
  • C 20%
  • D 15%

Question - 2

Which one of the following represents relative density of saturated sand deposit having moisture content of 25%, if maximum and minimum void ratio of sand are 0.95 and 0.45 respectively and specific gravity of sand particles is 2.6?

  • A 40%
  • B 50%
  • C 60%
  • D 70%

Question - 3

Soil is completed at which one of the following when a higher compactive effort produces highest increase in dry density?

  • A Optimum water content
  • B Dry side of optimum water content
  • C Wet side of optimum water content
  • D Saturation water content

Question - 4

The following soils are compacted at the same compactive effort in the field.Which one of the following is the correct sequence in the increasing order of their maximum dry density?

  • A Silty clay-clay-sand-gravel sand-clay mixture
  • B Sand-gravel sand-clay mixture-silty clay-clay
  • C Clay-silty day-sand-gravel sand clay mixture
  • D Sand-gravel sand clay mixture-clay-silty-clay

Question - 5

Soil has been compacted in an embankment at a bulk density of 2.15 mg/m3 and a water content of 12%.The value of specific gravity of soil solids is 2.65.The water table is below the foundation level, void ratio of the soil would be

  • A 0.48
  • B 0.42
  • C 0.38
  • D 0.34

Question - 6

The ultimate bearing capacity of a soil is 300 kN/m2 .The depth of foundation is 1 m and unit weight of soil is 20 kN/m3 .Choosing a factor of safety of 2.5, the net safe bearing capacity is

  • A 100 kN/m2
  • B 112 kN/m2
  • C 80 kN/m2
  • D 100.5 kN/m2

Question - 7

For general \(c-\phi \) soil, cohesion C is 50 kPa, the total unit weight \(\gamma \) is 20 kN/m3 and bearing capacity factors are, Nc =8, Nq=3 and N\(\gamma \)=2
(1) Using Terzaghi's formula the net ultimate bearing capacity for a strip footing of width B=2m and depth z=1m will be

  • A 500 kN/m2
  • B 480 kN/m2
  • C 520 kN/m2
  • D 460 kN/m2

Question - 8

For general \(c-\phi \) soil, cohesion C is 50 kPa, the total unit weight \(\gamma \) is 20 kN/m3 and bearing capacity factors are, Nc =8, Nq=3 and N\(\gamma \)=2
(2) Considering the shear failure only, the safe total load, on a footing 10m long, 2m wide strip footing using.Factor of safety of 3, will be

  • A 533.3 kN
  • B 4800 kN
  • C 3200 kN
  • D 1440 kN

Question - 9

The variation of earth pressure with wall movement is shown in figure by the points labelled.

  • A 1 and 2
  • B 2 and 3
  • C 2 and 4
  • D 1 and 4

Question - 10

In a wet soil mass, air occupies one sixth of its volume and water occupies one-third of its volume. The void ratio of the soil is

  • A 0.25
  • B 0.5
  • C 1.00
  • D 1.50
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