Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

1.0-1.1

0.8-0.9

0.6-0.7

0.4-0.5

2.

Which of the following is a measure of particle size range

None of the above

Coefficient of curvature

Effective size

Uniformity coefficient

3.

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

e= w.G/S

e= w/S.G

none of these

e= w.S/G

4.

The soil transported by wind is called

marine soil

lacustrine soil

aeolian soil

alluvial soil

5.

The friction offered by sand is equal to

Rolling friction

All of the above

Sliding friction

Resistance due to interlocking

6.

The specific gravity of sandy soils is

2.6

2.0

1.5

2.2

7.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Clayey soil

Sandy soil

Stratified soil

Silty soil

8.

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

Dry density

Relative density

Grading

Bulk density

9.

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

Bentonite

Organic clay

Dense sand

Stiff clay

10.

The soil transported by flowing water is called

alluvial soil

marine soil

aeolian soil

lacustrine soil

Page 2 of 5

11.

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

Void ratio

Void fraction

Porosity

Solid ratio

12.

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

0.300 mm

4.75 mm

0.150 mm

0.075 mm

13.

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

drift

Colluvial soil

aeolian soil

14.

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

poorly graded soil

well graded soil

none of these

uniformly graded soil

15.

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

Bentonite

Dense sand

Stiff clay

Loose sand

16.

Most suitable method for drainage of fine grained soil is

electro-osmosis method

deep well system

vacuum method

well point system

17.

The maximum size of grains of silt soil is about

2 mm

0.075 mm

0.5 mm

0.1 mm

18.

'Talus' is the soil transported by

glacier

water

gravitational force

wind

19.

A flat grain size distribution curve shows a

Wide range of grain size

Narrow range of grain size

Uniform grain size

Grain size from two representative fractions

20.

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

None of these

Porosity

Air content

Void density

Page 3 of 5

21.

Silts have the following property

plasticity

limited plasticity

elasticity

no plasticity

22.

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

Sand, silt, clay, colloids

Sand, silt, colloids, clay

Silt, sand, colloids, clay

Clay, silt, sand, colloids

23.

Darcy's law is not applicable for flow in

gravels

fine sands

clays

silts

24.

'Loess' is silty clay formed by the action of

gravitational force

wind

water

glacier

25.

Which of the following soils has the finest grains?

Silts

clays

Fine sands

Sands

26.

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

Strain softening

Plasticity

Strain hardening

27.

The effective size of a soil is

D40

D20

D10

D30

28.

Clay is generally

permeable

cohesive

none of these

having large particle size

29.

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

Degree of saturation

Moisture content

Unit weight of water

Density

30.

The biggest size of clay particles is

0.0002mm

0.02mm

0.075mm

0.002mm

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31.

As per IS the specific gravity of soil is determined at

17°C

10°C

27°C

47°C

32.

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

33.

The minimum size of grains of silt soil is about

0.06 mm

0.002 mm

0.01 mm

0.3 mm

34.

Non-cohesive soil is

none of these

silt

sand

clay

35.

Uniformity coefficient of soil is

<1

<=1

=1

>1

36.

Sedimentation analysis is used when size of particle is

> 0.75mm

4.75mm

0.01mm

< 0.075mm

37.

Stokes law is valid only if the size of particle is

Between 0.2mm and 0.0002mm

> 0.2mm

All of the above

< 0.0002mm

38.

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

Moisture content

Permeability

Capillarity

None of these

39.

Group index of soil ranges such that

0 <= GI <=20

0 <= GI <=25

0 < GI < 20

0 < GI < ∞

40.

The IS classification of soils is

Highway research board classification

Textural classification

Particles size classification

Modified unified classification

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41.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

< 0.075mm

4.75mm

42.

The percentage of the porosity of compacted sand is about

40 to 50 %

15 to 30 %

5 to 15%

30 to 40 %

43.

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

hydrated soil

plastic soil

moist soil

fully saturated soil

44.

On adding bitumen to soil

compaction becomes easy

water proofing improves

cohesion of soil increases

voids get filled

45.

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

4.75 mm

7.5 mm

1.50 micron

2 mm

46.

Undisturbed soil samples are obtained by

Thin walled samples

Augers

Thick walled samples

Direct excavations

Geotechnical Engineering MCQs Set-1

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