# Geotechnical Engineering Set 8

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