Geotechnical Engineering Set 8 MCQs

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