Geotechnical Engineering MCQs Set-1

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1.

Which of the following soils has the finest grains?

clays

Silts

Sands

Fine sands

2.

Group index of soil ranges such that

0 < GI < ∞

0 < GI < 20

0 <= GI <=20

0 <= GI <=25

3.

The soil collected at the base of a steep cliff due to the effect of the force of gravity on the broken rock fragment is

drift

Colluvial soil

aeolian soil

loess

4.

The property of a soil which allows it to be deformed rapidly, without rupture, with elastic rebound and without volume changes is called as

Strain hardening

Yielding

Strain softening

Plasticity

5.

'Loess' is silty clay formed by the action of

wind

gravitational force

glacier

water

6.

The specific gravity of sandy soils is

1.5

2.2

2.6

2.0

7.

The relation between void ratio e, water content w, specific gravity G, and degree of saturation S, for a soil sample is

e= w.S/G

e= w.G/S

e= w/S.G

none of these

8.

The correct increasing order of specific surface i.e. surface area per mass of the given soil is

Sand, silt, colloids, clay

Clay, silt, sand, colloids

Sand, silt, clay, colloids

Silt, sand, colloids, clay

9.

The property of a soil, which permits water to percolate through it is called

Capillarity

None of these

Moisture content

Permeability

10.

The dry density of which sample is expected to be highest?

Bentonite

Organic clay

Stiff clay

Dense sand

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11.

A flat grain size distribution curve shows a

Uniform grain size

Narrow range of grain size

Wide range of grain size

Grain size from two representative fractions

12.

The friction offered by sand is equal to

Resistance due to interlocking

All of the above

Rolling friction

Sliding friction

13.

The maximum size of grains of silt soil is about

0.075 mm

0.1 mm

0.5 mm

2 mm

14.

Undisturbed soil samples are obtained by

Augers

Thin walled samples

Direct excavations

Thick walled samples

15.

The IS classification of soils is

Modified unified classification

Highway research board classification

Textural classification

Particles size classification

16.

Sedimentation analysis is used when size of particle is

0.01mm

4.75mm

< 0.075mm

> 0.75mm

17.

Most suitable method for drainage of fine grained soil is

well point system

electro-osmosis method

deep well system

vacuum method

18.

The ratio between the total volume of voids and the total volume of solids is called

Void ratio

Porosity

Void fraction

Solid ratio

19.

When the pores of a soil are full of water, then the soil will be called

fully saturated soil

hydrated soil

plastic soil

moist soil

20.

The minimum size of grains of silt soil is about

0.01 mm

0.002 mm

0.3 mm

0.06 mm

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21.

'Talus' is the soil transported by

wind

water

glacier

gravitational force

22.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Silty soil

Sandy soil

Stratified soil

Clayey soil

23.

The dry density of which sample may be expected to be least?

Dense sand

Stiff clay

Loose sand

Bentonite

24.

As per IS the specific gravity of soil is determined at

47°C

17°C

27°C

10°C

25.

The soil transported by wind is called

marine soil

alluvial soil

lacustrine soil

aeolian soil

26.

If the value of uniformity coefficient of a soil sample is nearly equal to one. This sample will be designated as

none of these

uniformly graded soil

well graded soil

poorly graded soil

27.

The biggest size of clay particles is

0.02mm

0.002mm

0.0002mm

0.075mm

28.

The ratio of volume of air voids to the volume of voids is called

Porosity

Air content

Void density

None of these

29.

Coarse sieve analysis is done for that material which retains on the IS sieve of opening size

4.75 mm

1.50 micron

7.5 mm

2 mm

30.

The effective size of a soil is

D30

D40

D20

D10

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31.

The range of void ratio between which quick sand condition occurs in cohesion-less granular soil deposits is

0.8-0.9

0.6-0.7

1.0-1.1

0.4-0.5

32.

The weight of water per unit of volume of water is called

Density

Unit weight of water

Degree of saturation

Moisture content

33.

A line which show the water content dry density relation for the compacted soil containing no air voids is known as

Zero-air voids line

Azimuth

Constant density line

Proctor curve

34.

The soil transported by flowing water is called

aeolian soil

lacustrine soil

alluvial soil

marine soil

35.

Silts have the following property

no plasticity

elasticity

plasticity

limited plasticity

36.

Darcy's law is not applicable for flow in

silts

fine sands

gravels

clays

37.

Non-cohesive soil is

clay

silt

none of these

sand

38.

The best induction of the behaviour of a deposit of sand under load can be obtained from its

Relative density

Dry density

Grading

Bulk density

39.

Sieve analysis of a soil sample is done, if the particle do not pass through square openings of

0.150 mm

0.300 mm

4.75 mm

0.075 mm

40.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

< 0.075mm

4.75mm

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41.

Clay is generally

permeable

having large particle size

none of these

cohesive

42.

On adding bitumen to soil

water proofing improves

cohesion of soil increases

compaction becomes easy

voids get filled

43.

Uniformity coefficient of soil is

<1

=1

>1

<=1

44.

Stokes law is valid only if the size of particle is

All of the above

< 0.0002mm

Between 0.2mm and 0.0002mm

> 0.2mm

45.

Which of the following is a measure of particle size range

None of the above

Uniformity coefficient

Effective size

Coefficient of curvature

46.

The percentage of the porosity of compacted sand is about

30 to 40 %

40 to 50 %

15 to 30 %

5 to 15%

Geotechnical Engineering MCQs Set-1

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