Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

None of these

Void density

Air content

Porosity

2.

As per IS the specific gravity of soil is determined at

47°C

27°C

17°C

10°C

3.

Which of the following is a measure of particle size range

Coefficient of curvature

None of the above

Effective size

Uniformity coefficient

4.

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

Dense sand

Loose sand

Stiff clay

Bentonite

5.

'Loess' is silty clay formed by the action of

water

wind

gravitational force

glacier

6.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

< 0.075mm

4.75mm

7.

The minimum size of grains of silt soil is about

0.06 mm

0.002 mm

0.01 mm

0.3 mm

8.

Most suitable method for drainage of fine grained soil is

deep well system

well point system

electro-osmosis method

vacuum method

9.

Clay is generally

having large particle size

none of these

cohesive

permeable

10.

The percentage of the porosity of compacted sand is about

15 to 30 %

5 to 15%

30 to 40 %

40 to 50 %

Page 2 of 5

11.

On adding bitumen to soil

water proofing improves

cohesion of soil increases

voids get filled

compaction becomes easy

12.

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

Azimuth

Proctor curve

Zero-air voids line

Constant density line

13.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Silty soil

Sandy soil

Clayey soil

Stratified soil

14.

Sedimentation analysis is used when size of particle is

< 0.075mm

4.75mm

0.01mm

> 0.75mm

15.

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

Degree of saturation

Moisture content

Density

Unit weight of water

16.

The soil transported by flowing water is called

aeolian soil

marine soil

alluvial soil

lacustrine soil

17.

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

7.5 mm

4.75 mm

2 mm

1.50 micron

18.

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

Stiff clay

Dense sand

Bentonite

Organic clay

19.

The maximum size of grains of silt soil is about

0.1 mm

0.5 mm

0.075 mm

2 mm

20.

'Talus' is the soil transported by

gravitational force

water

glacier

wind

Page 3 of 5

21.

Group index of soil ranges such that

0 <= GI <=20

0 < GI < 20

0 < GI < ∞

0 <= GI <=25

22.

Uniformity coefficient of soil is

=1

<=1

<1

>1

23.

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

Silt, sand, colloids, clay

Clay, silt, sand, colloids

24.

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

0.8-0.9

1.0-1.1

0.4-0.5

0.6-0.7

25.

The soil transported by wind is called

alluvial soil

lacustrine soil

marine soil

aeolian soil

26.

The effective size of a soil is

D10

D30

D40

D20

27.

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 softening

Yielding

Strain hardening

28.

The biggest size of clay particles is

0.002mm

0.075mm

0.0002mm

0.02mm

29.

Which of the following soils has the finest grains?

Sands

Fine sands

Silts

clays

30.

The friction offered by sand is equal to

Resistance due to interlocking

All of the above

Rolling friction

Sliding friction

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31.

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

Relative density

Bulk density

Grading

Dry density

32.

The specific gravity of sandy soils is

1.5

2.6

2.2

2.0

33.

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

Solid ratio

Void fraction

Porosity

Void ratio

34.

Non-cohesive soil is

clay

sand

silt

none of these

35.

Silts have the following property

elasticity

no plasticity

limited plasticity

plasticity

36.

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

moist soil

plastic soil

hydrated soil

fully saturated soil

37.

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

0.075 mm

0.300 mm

0.150 mm

4.75 mm

38.

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

aeolian soil

Colluvial soil

39.

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

40.

Darcy's law is not applicable for flow in

clays

silts

gravels

fine sands

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41.

A flat grain size distribution curve shows a

Narrow range of grain size

Wide range of grain size

Grain size from two representative fractions

Uniform grain size

42.

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

None of these

Permeability

Capillarity

Moisture content

43.

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

44.

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

45.

The IS classification of soils is

Modified unified classification

Highway research board classification

Textural classification

Particles size classification

46.

Undisturbed soil samples are obtained by

Thin walled samples

Thick walled samples

Direct excavations

Augers

Geotechnical Engineering MCQs Set-1

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