Engineering/Civil Engineering (MCQS) Soil Mechanics and Foundation Engineering SET 3 Sample Test,Sample questions

Question:
 
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

1.1.47

2.1.82

3.1.92

4.none of these.


Question:
 
Negative skin friction on piles

1. is caused due to relative settlement of the soil

2. is caused in soft clays

3.decreases the pile capacity

4.all of the above.


Question:
 
Pick up the correct statement from the following:

1. Isotropic consolidation of clay can be obtained in the triaxial apparatus under equal all-round pressure.

2.If the present effective stress is the maximum to which the clay has ever been subjected, it is called normally consolidated clay

3.If the present effective stress in the past was more than present effective stress, it is called over-consolidated clay

4.All the above.


Question:
 
The specific gravity of sands, is approximately

1.1.6

2.2

3.2.2

4.2.6


Question:
  
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

1.0.55

2.0.65

3.0.75

4.0.8


Question:
  
A soil sample has passing 0.075 mm sieve = 60% liquid limit = 65% and plastic limit = 40%. The group index of the soil, is

1.5

2.20

3.40

4.none of these.


Question:
  
A stratum of clay 2 m thick will get consolidated 80% in 10 years. For the 80% consolidation of 8 m thick stratum of the same clay, the time required is

1.100 years

2.120 years

3.140 years

4.160 years


Question:
  
Depending upon the properties of a material, the failure envelope may

1.be either straight or curved

2.pass through the origin of stress

3. intersect the shear stress axis

4.all the above.


Question:
  
If a soil undergoes a change in shape and volume by application of external loads over it, but recovers its shape and volume immediately after removal of the load, the property of the soil is said to be

1.Resilience of soils

2.Elasticity of soils

3.Compressibility of soils

4.None of these.


Question:
  
If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is

1.0.375

2.0.37

3.0.38

4.0.39


Question:
  
If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 x 10-2 and 3 x 10-2, the void ratio of the soil sample, is

1.1.1

2.1.15

3.1.2

4.1.25


Question:
  
If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is

1.0.91

2.0.92

3.0.93

4.0.95


Question:
  
Pick up the correct statement applicable to plate load test

1.Width of the test pit for plate load test is made five times the width of the plate

2.At the centre of the test pit, a hole is dug out whose size is kept equal to the size of the test plate

3.Bottom level of the hole dug at the centre of the test pit, is kept at the level of the actual formation

4.All the above.


Question:
  
Pick up the correct statement applicable to plate load test

1. Width of the test pit for plate load test is made five times the width of the plate

2.At the centre of the test pit, a hole is dug out whose size is kept equal to the size of the test plate

3.At the centre of the test pit, a hole is dug out whose size is kept equal to the size of the test plate

4.All the above.


Question:
  
Pick up the correct statement from the following:

1.The phenomenon of quicksand generally occurs in the cohesionless soil

2.At critical hydraulic gradient, the saturated sand becomes quick

3.The critical gradient depends on the void ratio and the specific gravity

4.All the above.


Question:
  
The capillary rise of water

1.depends upon the force responsible

2. increases as the size of the soil particles increases

3.decreases as the size of the soil particles decreases

4. is less in wet soil than in dry soil.


Question:
  
The coefficient of curvature for a well graded soil, must be between

1.0.5 to 1.0

2.1.0 to 3.0

3.3.0 to 4.0

4. 4.0 to 5.0


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

1.compaction

2.consolidation

3.swelling

4.none of these.


Question:
  
The shear resistance of a soil is con-tituted basically of the following component.

1.The frictional resistance to translocation between the individual soil particles at their contact point

2.To the structural relation to displacement of the soil because of the interlocking of the particles

3.Cohesion and adhesion between the surfaces of the soil particles

4.All the above.


Question:
  
The ultimate bearing capacity of a soil, is

1.total load on the bearing area

2.safe load on the bearing area

3. load at which soil fails

4.load at which soil consolidates.


Question:
  
Transporting and redepositing soils, is done by

1.water

2.glacier

3.gravity

4.all the above.


Question:
A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is

1.54%

2.64%

3.74%

4.84%


Question:
Coulomb's wedge theory assumes that

1. back fill is dry, cohesionless, homogeneous and isotropic

2.slip surface is the plane which passes through the heel of the wall

3.sliding wedge itself acts as a rigid body and the value of earth pressure is obtained by considering the limiting equilibrium of the wedge

4.all the above.


Question:
Darcy's law is applicable to seepage if a soil is

1.homogeneous

2.isotropic

3.incompressible

4.all the above.


Question:
If the back fill is having a uniform surcharge of intensity q per unit area, the lateral pressure will be

1.q times the lateral pressure within the surface

2.1/q times the lateral pressure within the surface

3. equal to a fill of height Z equal to q/r, where r is the density of the backfill

4. none of these.


Question:
If the cohesive force, (c), is 1.5 t/m2, the density (γ) of the soil is 2.0 t/m3, factor of safety (F) is 1.5 and stability factor (Sn) is 0.05, the safe height of the §lope, is

1.5 metres

2.8 metres

3.10 metres

4.12 metres


Question:
The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated

1.sands

2.clays

3.gravels

4.highly organic soils.


Question:
Maximum size of clay particles, is :

1. 0.002 mm

2. 0.04 mm

3. 0.06 mm

4. 0.08 mm


Question:
Over-consolidation of soils is caused due to

1.erosion of over burden

2.melting of ice sheets after glaciation

3.permanent rise of water table

4.all the above.


Question:
Pick up the correct statement from the following:

1.O.M.C. refers to the moisture corresponding to the maximum point on the moisture content dry density curve

2.The line which shows moisture content dry density relation for soil containing a constant percentage of air voids, is known as air void line

3.The weight of hammer used for compaction test is 25 kg

4.All the above.


Question:
Pick up the incorrect statement from the following:

1.The smaller the size of the pores, the higher the water can rise above the water table.

2.Below the water table, the pore water may be static.

3.The hydrostatic pressure depends on the depth below the water level.

4.None of these.


Question:
Si particles

1.show dilatancy

2.swell when moist

3.possess high strength when dry

4.disintegrate easily.


Question:
Soil classification of composite soils, exclusively based on the particle size distribution, is known

1.particle classification

2. textural classification

3.High Way Research Board classification

4.unified soil classification.


Question:
The factor which affects the compaction, is

1.moisture content

2. compacting content

3.method of compaction

4.All the above.


Question:
The maximum net pressure intensity causing shear failure of soil, is known

1.safe bearing capacity

2.net safe bearing capacity

3.net ultimate bearing capacity

4.ultimate bearing capacity.


Question:
The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass, is known

1. liquid limit

2.plastic limit

3.shrinkage limit

4.permeability limit.


Question:
The minimum centre to centre distance of friction piles of 1 m diameter, is

1. 2 m

2.2 m to 3 m

3. 3 m to 4 m

4. 5 m


Question:
The plasticity index is the numerical difference between

1.liquid limit and plastic limit

2.plastic limit and shrinkage limit

3.liquid limit and shrinkage limit

4.none of these.


Question:
The specific gravity of quartz, is

1.2.65

2.2.72

3.2.85

4.2.9


Question:
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

1.0.01

2.0.02

3.0.05

4.0.001


Question:
Through a point in a loaded soil, the principal stress is maximum on

1.minor principal plane

2.intermediate principal plane

3.major principal plane

4.none of these.


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