Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

The biggest size of clay particles is

0.02mm

0.075mm

0.002mm

0.0002mm

2.

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

None of these

Capillarity

Moisture content

Permeability

3.

Stokes law is valid only if the size of particle is

> 0.2mm

< 0.0002mm

All of the above

Between 0.2mm and 0.0002mm

4.

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

Porosity

Void density

Air content

None of these

5.

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

plastic soil

fully saturated soil

hydrated soil

moist soil

6.

On adding bitumen to soil

voids get filled

water proofing improves

cohesion of soil increases

compaction becomes easy

7.

The specific gravity of sandy soils is

1.5

2.2

2.0

2.6

8.

As per IS the specific gravity of soil is determined at

47°C

27°C

10°C

17°C

9.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Clayey soil

Silty soil

Sandy soil

Stratified soil

10.

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

Solid ratio

Void fraction

Void ratio

Porosity

Page 2 of 5

11.

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

Azimuth

Constant density line

Zero-air voids line

Proctor curve

12.

'Talus' is the soil transported by

glacier

wind

water

gravitational force

13.

The percentage of the porosity of compacted sand is about

15 to 30 %

5 to 15%

30 to 40 %

40 to 50 %

14.

A flat grain size distribution curve shows a

Uniform grain size

Grain size from two representative fractions

Narrow range of grain size

Wide range of grain size

15.

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

0.6-0.7

0.8-0.9

1.0-1.1

0.4-0.5

16.

Which of the following is a measure of particle size range

Uniformity coefficient

Coefficient of curvature

Effective size

None of the above

17.

Which of the following soils has the finest grains?

Silts

Fine sands

Sands

clays

18.

Sieve analysis is used when size of particle is

< 0.075mm

0.01mm

> 0.075mm

4.75mm

19.

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

none of these

e= w.G/S

e= w.S/G

e= w/S.G

20.

'Loess' is silty clay formed by the action of

gravitational force

glacier

wind

water

Page 3 of 5

21.

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

Unit weight of water

Moisture content

Degree of saturation

Density

22.

The minimum size of grains of silt soil is about

0.3 mm

0.06 mm

0.002 mm

0.01 mm

23.

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

24.

The soil transported by wind is called

lacustrine soil

alluvial soil

marine soil

aeolian soil

25.

The effective size of a soil is

D40

D20

D10

D30

26.

Group index of soil ranges such that

0 <= GI <=25

0 <= GI <=20

0 < GI < 20

0 < GI < ∞

27.

Uniformity coefficient of soil is

<1

>1

=1

<=1

28.

Sedimentation analysis is used when size of particle is

0.01mm

< 0.075mm

4.75mm

> 0.75mm

29.

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

2 mm

1.50 micron

7.5 mm

4.75 mm

30.

Most suitable method for drainage of fine grained soil is

electro-osmosis method

deep well system

vacuum method

well point system

Page 4 of 5

31.

Undisturbed soil samples are obtained by

Augers

Thick walled samples

Direct excavations

Thin walled samples

32.

The friction offered by sand is equal to

Rolling friction

All of the above

Sliding friction

Resistance due to interlocking

33.

Non-cohesive soil is

none of these

silt

sand

clay

34.

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

Dense sand

Organic clay

Stiff clay

Bentonite

35.

The maximum size of grains of silt soil is about

0.5 mm

2 mm

0.1 mm

0.075 mm

36.

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

loess

Colluvial soil

drift

aeolian soil

37.

The IS classification of soils is

Highway research board classification

Textural classification

Modified unified classification

Particles size classification

38.

Clay is generally

having large particle size

none of these

cohesive

permeable

39.

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

Yielding

Plasticity

Strain hardening

Strain softening

40.

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

Sand, silt, colloids, clay

Sand, silt, clay, colloids

Clay, silt, sand, colloids

Silt, sand, colloids, clay

Page 5 of 5

41.

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

uniformly graded soil

well graded soil

poorly graded soil

none of these

42.

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

0.075 mm

0.150 mm

4.75 mm

0.300 mm

43.

Silts have the following property

no plasticity

plasticity

elasticity

limited plasticity

44.

The soil transported by flowing water is called

marine soil

alluvial soil

lacustrine soil

aeolian soil

45.

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

Bentonite

Stiff clay

Dense sand

Loose sand

46.

Darcy's law is not applicable for flow in

gravels

fine sands

silts

clays

Geotechnical Engineering MCQs Set-1

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