Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

Void fraction

Solid ratio

Void ratio

Porosity

2.

The minimum size of grains of silt soil is about

0.3 mm

0.002 mm

0.01 mm

0.06 mm

3.

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

4.

Group index of soil ranges such that

0 <= GI <=25

0 < GI < ∞

0 < GI < 20

0 <= GI <=20

5.

As per IS the specific gravity of soil is determined at

17°C

10°C

47°C

27°C

6.

The soil transported by wind is called

marine soil

aeolian soil

lacustrine soil

alluvial soil

7.

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

0.075 mm

4.75 mm

0.150 mm

0.300 mm

8.

'Talus' is the soil transported by

water

wind

gravitational force

glacier

9.

Which of the following is a measure of particle size range

Uniformity coefficient

Coefficient of curvature

None of the above

Effective size

10.

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

2 mm

7.5 mm

4.75 mm

1.50 micron

Page 2 of 5

11.

Darcy's law is not applicable for flow in

fine sands

gravels

clays

silts

12.

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

well graded soil

uniformly graded soil

none of these

poorly graded soil

13.

Sieve analysis is used when size of particle is

< 0.075mm

4.75mm

0.01mm

> 0.075mm

14.

The effective size of a soil is

D40

D20

D10

D30

15.

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

Permeability

Capillarity

None of these

Moisture content

16.

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

Proctor curve

Azimuth

Constant density line

Zero-air voids line

17.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Sandy soil

Stratified soil

Clayey soil

Silty soil

18.

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

none of these

e= w/S.G

e= w.G/S

19.

The percentage of the porosity of compacted sand is about

15 to 30 %

40 to 50 %

30 to 40 %

5 to 15%

20.

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

Bentonite

Dense sand

Organic clay

Stiff clay

Page 3 of 5

21.

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

Void density

Air content

None of these

Porosity

22.

Most suitable method for drainage of fine grained soil is

well point system

vacuum method

deep well system

electro-osmosis method

23.

The specific gravity of sandy soils is

2.0

1.5

2.6

2.2

24.

Non-cohesive soil is

silt

sand

none of these

clay

25.

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

0.4-0.5

1.0-1.1

0.8-0.9

0.6-0.7

26.

Undisturbed soil samples are obtained by

Thin walled samples

Direct excavations

Thick walled samples

Augers

27.

The IS classification of soils is

Particles size classification

Highway research board classification

Textural classification

Modified unified classification

28.

Sedimentation analysis is used when size of particle is

4.75mm

> 0.75mm

< 0.075mm

0.01mm

29.

On adding bitumen to soil

water proofing improves

voids get filled

compaction becomes easy

cohesion of soil increases

30.

Uniformity coefficient of soil is

=1

>1

<1

<=1

Page 4 of 5

31.

Clay is generally

having large particle size

permeable

cohesive

none of these

32.

Silts have the following property

no plasticity

limited plasticity

plasticity

elasticity

33.

Which of the following soils has the finest grains?

Sands

Fine sands

Silts

clays

34.

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

Stiff clay

Dense sand

Loose sand

Bentonite

35.

The friction offered by sand is equal to

Sliding friction

Resistance due to interlocking

All of the above

Rolling friction

36.

'Loess' is silty clay formed by the action of

water

gravitational force

wind

glacier

37.

The maximum size of grains of silt soil is about

0.1 mm

0.5 mm

0.075 mm

2 mm

38.

The soil transported by flowing water is called

alluvial soil

marine soil

aeolian soil

lacustrine soil

39.

Stokes law is valid only if the size of particle is

< 0.0002mm

All of the above

> 0.2mm

Between 0.2mm and 0.0002mm

40.

The biggest size of clay particles is

0.075mm

0.002mm

0.0002mm

0.02mm

Page 5 of 5

41.

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

fully saturated soil

plastic soil

moist soil

hydrated soil

42.

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

Unit weight of water

Degree of saturation

Density

Moisture content

43.

A flat grain size distribution curve shows a

Narrow range of grain size

Grain size from two representative fractions

Wide range of grain size

Uniform grain size

44.

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

loess

Colluvial soil

aeolian soil

45.

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

46.

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

Plasticity

Yielding

Strain softening

Geotechnical Engineering MCQs Set-1

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