Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

Which of the following soils has the finest grains?

Silts

Sands

Fine sands

clays

2.

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

Organic clay

Dense sand

Stiff clay

Bentonite

3.

Most suitable method for drainage of fine grained soil is

well point system

deep well system

electro-osmosis method

vacuum method

4.

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

Bentonite

Dense sand

Stiff clay

Loose sand

5.

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

loess

aeolian soil

6.

The percentage of the porosity of compacted sand is about

5 to 15%

40 to 50 %

30 to 40 %

15 to 30 %

7.

The biggest size of clay particles is

0.0002mm

0.002mm

0.02mm

0.075mm

8.

Stokes law is valid only if the size of particle is

Between 0.2mm and 0.0002mm

< 0.0002mm

All of the above

> 0.2mm

9.

Uniformity coefficient of soil is

=1

<=1

<1

>1

10.

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

Void ratio

Void fraction

Solid ratio

Porosity

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11.

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

Porosity

None of these

Void density

Air content

12.

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

Clay, silt, sand, colloids

Silt, sand, colloids, clay

Sand, silt, clay, colloids

Sand, silt, colloids, clay

13.

The specific gravity of sandy soils is

2.2

2.0

1.5

2.6

14.

The soil transported by wind is called

marine soil

lacustrine soil

alluvial soil

aeolian soil

15.

'Talus' is the soil transported by

gravitational force

water

wind

glacier

16.

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

0.150 mm

0.075 mm

0.300 mm

4.75 mm

17.

Which of the following is a measure of particle size range

None of the above

Coefficient of curvature

Uniformity coefficient

Effective size

18.

Silts have the following property

limited plasticity

plasticity

no plasticity

elasticity

19.

The effective size of a soil is

D40

D10

D30

D20

20.

'Loess' is silty clay formed by the action of

wind

water

glacier

gravitational force

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21.

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

7.5 mm

1.50 micron

4.75 mm

2 mm

22.

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

Permeability

None of these

Capillarity

Moisture content

23.

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

24.

The soil transported by flowing water is called

marine soil

aeolian soil

lacustrine soil

alluvial soil

25.

The minimum size of grains of silt soil is about

0.01 mm

0.002 mm

0.3 mm

0.06 mm

26.

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

0.6-0.7

1.0-1.1

0.8-0.9

0.4-0.5

27.

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

uniformly graded soil

none of these

well graded soil

poorly graded soil

28.

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

Bulk density

Dry density

Grading

Relative density

29.

Clay is generally

none of these

having large particle size

permeable

cohesive

30.

Non-cohesive soil is

sand

clay

silt

none of these

Page 4 of 5

31.

The friction offered by sand is equal to

Resistance due to interlocking

Sliding friction

Rolling friction

All of the above

32.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Clayey soil

Silty soil

Stratified soil

Sandy soil

33.

The maximum size of grains of silt soil is about

0.5 mm

0.1 mm

2 mm

0.075 mm

34.

Darcy's law is not applicable for flow in

fine sands

clays

gravels

silts

35.

The IS classification of soils is

Particles size classification

Highway research board classification

Modified unified classification

Textural classification

36.

On adding bitumen to soil

voids get filled

water proofing improves

compaction becomes easy

cohesion of soil increases

37.

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

Degree of saturation

Density

Unit weight of water

Moisture content

38.

Sieve analysis is used when size of particle is

> 0.075mm

4.75mm

0.01mm

< 0.075mm

39.

Sedimentation analysis is used when size of particle is

> 0.75mm

0.01mm

4.75mm

< 0.075mm

40.

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

Azimuth

Proctor curve

Constant density line

Zero-air voids line

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41.

Undisturbed soil samples are obtained by

Thin walled samples

Thick walled samples

Augers

Direct excavations

42.

As per IS the specific gravity of soil is determined at

17°C

10°C

47°C

27°C

43.

A flat grain size distribution curve shows a

Grain size from two representative fractions

Wide range of grain size

Uniform grain size

Narrow range of grain size

44.

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

45.

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

Plasticity

Strain hardening

Yielding

Strain softening

46.

Group index of soil ranges such that

0 < GI < ∞

0 < GI < 20

0 <= GI <=25

0 <= GI <=20

Geotechnical Engineering MCQs Set-1

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