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This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on Geotechnical Engineering Set 11
Q1 | Pick up the correct statement from the following:
- The property of a soil that enables it to become stiff in a relatively short time on standing is called thixotropy
- The ratio of shear strength in natural state to the remoulded shear strength under undrained conditions is called degree of sensitivity
- The difference between the undisturbed shear strength and remoulded shear strength is known remoulding loss
- All the above
Q2 | Voids ratio of a soil mass can
- Never be greater than unity
- Be zero
- Take any value greater than zero
- Take values between 0 and 1 only
Q3 | If the cohesive force (c), is 1.5 t/m2, the density ) of the soil is 2.0 t/m3, factor of safety (F) is 1.5and stability factor (Sn) is 0.05, the safe height of a slope is
- 5 metres
- 8 metres
- 10 metres
- 12 metres
Q4 | If the plasticity index of a soil mass is zero, the soil is
- Sand
- Silt
- Clay
- Clayey silt
Q5 | Coulomb's wedge theory assumes that
- Back fill is dry, cohesionless, homogeneous and isotropic
- Slip surface is the plane which passes through the heel of the wall
- Position and direction of the resultant earth pressure are known
- All the above
Q6 | Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability
- Increases by 25 %
- Increases by 50 %
- Increases by 33.3 %
- Decreases by 33.3 %
Q7 | Transporting and re-depositing soils, is done by
- Water
- Glacier
- Gravity
- All the above
Q8 | For a loose sand sample and a dense sand sample consolidated to the same effective stress
- Ultimate strength is same and also peak strength is same
- Ultimate strength is different but peak strength is same
- Ultimate strength is same but peak strength of dense sand is greater than that of loose sand
- Ultimate strength is same but peak
Q9 | The void ratio of a soil sample decreases from 1.50 to 1.25 when the pressure is increased from 25 tonnes/m2 to 50 tonnes/m2, the coefficient of compressibility is
- 0.01
- 0.02
- 0.05
- 0.001
Q10 | The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is
- 03-Jan
- 3
- 1
- 02-Jan
Q11 | If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is
- 40%
- 60%
- 80%
- 100%
Q12 | Which one of the following statements is true?
- Clays are more porous than sands
- Pressure of organic matter in a soil decreases the bearing capacity of the soil
- Aluminous cement is used for foundations in soils with chemical deposits
- All the above
Q13 | According to IS classification, the range of silt size particles is
- 4.75 mm to 2.00 mm
- 2.00 mm to 0.425 mm
- 0.425 mm to 0.075 mm
- 0.075 mm to 0.002 mm
Q14 | Pick up the clay soil group which does not swell when wet from the following:
- Kaolinite group
- Mite group
- Vermiculite group
- Montrorillonite group
Q15 | Coefficient of consolidation of a soil is affected by
- Compressibility
- Permeability
- Both compressibility and permeability
- None of the above
Q16 | Pick up the correct statement from the following:
- When water table is above the base of a footing, the dry weight m should be used for soil below water table
- When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used
- When water table is just at the base of the footing, no reduction factor is used
- None of these
Q17 | Select the incorrect statement. Effective angle of shearing resistance
- Increases as the size of particles increases
- Increases as the soil gradation improves
- Is limited to a maximum value of 45°
- Is rarely more than 30° for fine grained soil
Q18 | The relationship between void ratio (e) and porosity ratio (n) is:
- n = (1 + e )/(1 - e)
- e = (1 + n)/(1 - e)
- n = e/(1 - e)
- e = n/(1 - n)
Q19 | Relative density of a compacted dense sand is approximately equal to
- 0.4
- 0.6
- 0.95
- 1.2
Q20 | Pick up the correct statement from the following:
- To an agriculturist, soil is the substance existing on the earth's surface, which grows and develops plants
- To a geologist, soil is the material in a relatively thin surface zone within which roots occur, and rest of the crust is termed as rock irrespective of hardness
- To an engineer, soil is the unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust
- All the above
Q21 | Inorganic soils with low compressibility are represented by
- MH
- SL
- ML
- CH
Q22 | In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as
- Consolidated drained test
- Consolidated undrained test
- Unconsolidated drained test
- Unconsolidated undrained test
Q23 | The specific gravity of quartz, is
- 2.65
- 2.72
- 2.85
- 2.9
Q24 | In hydrometer analysis for a soil mass
- Both meniscus correction and dispersing agent correction are additive
- Both meniscus correction and dispersing agent correction are subtractive
- Meniscus correction is additive and dispersing agent correction is subtractive
- Meniscus correction is subtractive and dispersing agent correction is additive
Q25 | The capillary rise of water
- Depends upon the force responsible
- Increases as the size of the soil particles increases
- Decreases as the size of the soil particles decreases
- Is less in wet soil than in dry soil