Geotechnical Engineering Set 2 MCQs

Q1 | Which one of the following clays behaves like a dense sand?

Over-consolidated clay with a high over-consolidation ratio

Over-consolidated clay with a low over-consolidation ratio

Normally consolidated clay

Under-consolidated clay

Q2 | During seepage through a soil, direction of seepage is always

Parallel to equipotential lines

Perpendicular to stream lines

Perpendicular to equipotential lines

None of these

Q3 | The seepage force in a soil, is

Perpendicular to the equipotential lines

Proportional to the exit gradient

Proportional to the head loss

All the above

Q4 | Pick up the correct statement from the following:

Coefficient of compressibility is the decrease in void ratio per unit increase of pressure

The percent settlement at any time is called degree of consolidation

Time factor is a dimensionless quantity

All the above

Q5 | Direct measurement of permeability of the specimen at any stage of loading can be made

Only in fixed ring type consolidometer

Only in floating ring type consolidometer

Both (A) and (B)

None of the above

Q6 | The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known

Porosity

Plasticity

Permeability

Ductility

Q7 | Failure of the stability of slopes, generally occurs along

Slip plane

A horizontal surface

A curved surface

All the surfaces

Q8 | The shearing force acting along the slice of a curved surface of slippage, causes the soil to slide

Down at the centre

Down at the toe

Upward at the centre

None of these

Q9 | With the increase in the amount of compaction energy

Optimum water content increases but maximum dry density decreases

Optimum water content decreases but maximum dry density increases

Both optimum water content and maximum dry density increase

Both optimum water content and maximum dry density decrease

Q10 | Soils containing organic matters

Are of spongy nature

Swell with decrease of moisture

Shrink with increase of moisture content

None of these

Q11 | Buoyant unit weight equals the saturated density

Multiplied by unit weight of water

Divided by unit weight of water

Plus unit weight of water

Minus unit weight of water

Q12 | The change of moisture content of soils, changes the

Value of the angle of repose

Amount of compaction required

Cohesive strength of soil

All the above

Q13 | Skempton's pore pressure coefficient B for saturated soil is

1

Zero

Between 0 and 1

Greater than 1

Q14 | The density of soil can be increased

By reducing the space occupied by air

By elastic compression of soil grains

By expelling water from pores

All the above

Q15 | Pick up the correct statement from the following:

Kaolinite is most stable clay

Kaolinite shows a very little sign of swelling on wetting

Kaolinite is also called China clay

All the above

Q16 | Pick up the correct definition from the following:

The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil

The lateral pressure exerted by the soil when the retaining wail moves towards the soil, is generally known as 'Passive earth pressure of the soil

The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil

All the above

Q17 | Shear strength of a soil is a unique function of

Effective stress only

Total stress only

Both effective stress and total stress

None of the above

Q18 | 260 g of wet soil was taken in a pycnometer jar of weight 400 g in order to find the moisture content in the soil, with specific gravity of soil particles 2.75. The weight of soil and remaining water filled in pycnometer without air bubbles was 1415 g and the weight of pycnometer filled with water alone was 1275 g. The moisture content in the soil is

24.20%

18.20%

53.80%

None of these

Q19 | The angle that Coulomb's failure envelope makes with the horizontal is called

Cohesion

Angle of internal friction

Angle of repose

None of the above

Q20 | A flow net may be utilised for the determination of

Exit gradient

Seepage

Hydrostatic pressure

All the above

Q21 | The compression index of a soil

Decreases with an increase in the liquid limit

Increases with an increase in the liquid limit

Decreases with an increase in the plastic limit

Is not related with plastic limit

Q22 | If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is

03-Jan

03-Feb

1

3

Q23 | Sensitivity of a soil can be defined as

Percentage of volume change of soil under saturated condition

Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

Ratio of volume of voids to volume of solids

None of the above

Q24 | The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3, is

4 t/m2

5 t/m2

6 t/m2

7 t/m2

Q25 | The soil moisture driven off by heat, is called

Free water

Hydroscopic water

Gravity water

None of these