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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