Geotechnical Engineering Set 8

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This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on Geotechnical Engineering Set 8

Q1 | In the plate loading test for determining the bearing capacity of soil, the size of squarebearing plate should be
  • Less than 300 mm
  • Between 300 mm and 750 mm
  • Between 750 mm and 1 m
  • Greater than 1 m
Q2 | If the specific gravity of a soil particle of 0.05 cm diameter is 2.67, its terminal velocity while settling in distilled water of viscosity, 0.01 poise, is
  • 0.2200 cm/sec
  • 0.2225 cm/sec
  • 0.2250 cm/sec
  • 0.2275 cm/sec
Q3 | The shear strength in plastic undrained clay, is due to
  • Inter-granular friction
  • Internal friction
  • Cohesion
  • None of these
Q4 | A fully saturated soil is said to be
  • One phase system
  • Two phase system with soil and air
  • Two phase system with soil and water
  • Three phase system
Q5 | If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are
  • 1.0 and 0.0
  • 0.0 and 1.0
  • 0.5 and 1.0
  • 1.0 and 0.5
Q6 | The compressibility of clays is caused due to:
  • Expulsion of double layer water from in between the grains
  • Sliping of particles to new positions of greater density
  • Bending of particles as elastic sheets
  • All the above
Q7 | Sedimentation analysis is based on the assumption:
  • Soil particles are spherical
  • Particles settle independent of other particles
  • Walls of the jar do not affect the settlement
  • All the above
Q8 | A pycnometer is used to determine
  • Water content and voids ratio
  • Specific gravity and dry density
  • Water content and specific gravity
  • Voids ratio and dry density
Q9 | The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated
  • Sands
  • Clays
  • Gravels
  • Highly organic soil
Q10 | When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported
  • Negative
  • Zero
  • Non-plastic (NP)
  • 1
Q11 | Flow net is used for the determination of
  • Quantity of seepage
  • Hydrostatic pressure
  • Seepage pressure
  • All the above
Q12 | The inventor of the term soil mechanics, was
  • Kray
  • Dr. Karl Terzaghi
  • Leygue
  • Fellenius
Q13 | Highway Research Board (HRB) classification of soils is based on
  • Particle size composition
  • Plasticity characteristics
  • Both particle size composition and plasticity characteristics
  • None of the above
Q14 | Stoke's law does not hold good if the size of particle is smaller than
  • 0.0002 mm
  • 0.002 mm
  • 0.02 mm
  • 0.2 mm
Q15 | Quick sand is a
  • Type of sand
  • Flow condition occurring in cohesive soils
  • Flow condition occurring in cohesion -less soils
  • Flow condition occurring in both cohesive and cohesion-less soils
Q16 | Pick up the correct statement from the following:
  • O.M.C. refers to the moisture corresponding to the maximum point on the moisture content dry density curve
  • The line which shows moisture content dry density relation for soil containing a constant percentage of air voids, is known as air void line
  • The free fall of hammer for compaction is 30.5 cm
  • All the above
Q17 | A saturated soil sample has water content of 40% and specific gravity of soil particles 2.7. Thevoid ratio of the soil, is
  • 0.4
  • 0.52
  • 1.08
  • None of these
Q18 | The total discharge from two wells situated near to each other is
  • Sum of the discharges from individual wells
  • Less than the sum of the discharges from individual wells
  • Greater than the sum of the discharges from individual wells
  • Equal to larger of the two discharges from individual wells
Q19 | A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3, is
  • 1.47
  • 1.82
  • 1.91
  • None of these
Q20 | Compressibility of sandy soils is
  • Almost equal to that of clayey soils
  • Much greater than that of clayey soils
  • Much less than that of clayey soils
  • None of the above
Q21 | Depending upon the properties of a material, the failure envelope may
  • Be either straight or curved
  • Pass through the origin of stress
  • Intersect the shear stress axis
  • All the above
Q22 | The maximum pressure which a soil can carry without shear failure, is called
  • Safe bearing capacity
  • Net safe bearing capacity
  • Net ultimate bearing capacity
  • Ultimate bearing capacity
Q23 | In a deposit of normally consolidated clay
  • Effective stress increases with depth but water content of soil and undrained strength decrease with depth
  • Effective stress and water content increase with depth but undrained strength decreases with depth
  • Effective stress and undrained strength increase with depth but water content decreases with depth
  • Effective stress, water content and undrained strength decrease with depth
Q24 | A moist soil sample weighing 108 g has a volume of 60 cc. If water content is 25% and value of G = 2.52, the void ratio is
  • 0.55
  • 0.65
  • 0.75
  • 0.8
Q25 | For slopes of limited extent the surface of slippage, is usually along
  • A parabolic arc
  • An elliptical arc
  • A straight line
  • A circular arc