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This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on Geotechnical Engineering Set 12

Q1 | The value of compression index for a remoulded sample whose liquid limit is 50% is

- 0.028
- 0.28
- 36
- 0.036

Q2 | Fine sand possesses

- Good plasticity
- Limited plasticity
- Reasonable plasticity
- Clay

Q3 | Coarse grained soils are best compacted by a

- Drum roller
- Rubber tyred roller
- Sheep's foot roller
- Vibratory roller

Q4 | According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is

- 0 < PI < 7
- 7< PI < 17
- 17 < PI <27
- PI > 27

Q5 | The coefficient of curvature for a well graded soil, must be between

- 0.5 to 1.0
- 1.0 to 3.0
- 3.0 to 4.0
- 4.0 to 5.0

Q6 | A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m² to 200 kN/m². If the effective stress is further increased from 200 kN/m² to 400 kN/m², then the settlement of the same clay is

- 10 mm
- 20 mm
- 40 mm
- None of the above

Q7 | The lateral earth pressure on a retaining wall

- Is equal to mass of the soil retained
- Proportional to the depth of the soil
- Proportional to the square of the depth of the soil
- Proportional to the internal friction of the soil

Q8 | If the permeability of a soil is 0.8 mm/sec, the type of soil is

- Gravel
- Sand
- Silt
- Clay

Q9 | A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm3. If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is

- 11.10%
- 55.60%
- 69.60%
- None of these

Q10 | Which of the following soils has more plasticity index?

- Sand
- Silt
- Clay
- Gravel

Q11 | The liquid limit and plastic limit exist in

- Sandy soils
- Silty soils
- Gravel soils
- Clay soils

Q12 | For determining the moisture content of a soil sample, the following data is available Weight of container = 260 g, Weight of soil sample and = 320 g container, Weight of soil sample (dried) and = 310 g container. The moisture content of the soil sample, is

- 15%
- 18%
- 20%
- 25%

Q13 | For a homogeneous earth dam 50 m high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.4. If co - efficiency of permeability of the dam material is 3 × 10-3 cm3/sec, the discharge per metre length of dam, is

- 12 × 10- 5 m3/sec
- 24 × 10-3 m3/sec
- 6 × 10-5 m3/sec
- 24 × 10- 5 m3/sec

Q14 | The soil which contains finest grain particles, is

- Coarse sand
- Fine sand
- Silt
- Clay

Q15 | The minimum centre to centre distance of friction piles of 1 m diameter, is

- 2 m
- 2 m to 3 m
- 3 m to 4 m
- 5 m

Q16 | When drainage is permitted under initially applied normal stress only and full primarily consolidation is allowed to take place, the test is known as

- Quick test
- Drained test
- Consolidated undrained test
- None of these

Q17 | The liquidity index is defined as a ratio expressed as percentage of

- Plastic limit minus the natural water content, to its plasticity index
- Natural water content minus its plastic limit to its plasticity index
- Natural water content plus its plastic limit to its plasticity index
- Liquid limit minus the natural water content to the plasticity index

Q18 | Number of piles required to support a column, is

- 1
- 2
- 3
- 4

Q19 | According to the Indian Standards the specific gravity is the ratio of the unit weight of soil solids to that of water at a temperature of

- 17°C
- 23°C
- 27°C
- 30°C

Q20 | Maximum size of clay particles is:

- 0.002 mm
- 0.04 mm
- 0.06 mm
- 0.08 mm

Q21 | The compression resulting from a long term static load and consequent escape of pore water,is known as

- Compaction
- Consolidation
- Swelling
- None of these

Q22 | Minimum size of the particles of silt soil, is

- 0.002 mm
- 0.04 mm
- 0.06 mm
- 0.08 mm

Q23 | The ultimate Settlement of a soil is directly proportional to:

- Depth of the compressible soil strata
- Compressive index
- Both (a) and (b)
- None of these

Q24 | A pile is being driven with a drop hammer weighing 1800 kg and having a free fall of 1.00 m. If the penetration with last blow is 5 mm, the load carrying capacity of the pile, -according to the Engineering News formula, is

- 100 tonnes
- 50 tonnes
- 20 tonnes
- 10 tonnes

Q25 | Water formed transported soil is

- Alluvial
- Marine
- Lacustrine
- Loess