Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

Undisturbed soil samples are obtained by

Thin walled samples

Direct excavations

Thick walled samples

Augers

2.

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

Permeability

Capillarity

Moisture content

None of these

3.

The IS classification of soils is

Textural classification

Particles size classification

Modified unified classification

Highway research board classification

4.

The maximum size of grains of silt soil is about

0.1 mm

0.5 mm

2 mm

0.075 mm

5.

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

6.

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

Bentonite

Loose sand

Dense sand

Stiff clay

7.

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

8.

Uniformity coefficient of soil is

<=1

=1

>1

<1

9.

As per IS the specific gravity of soil is determined at

47°C

17°C

10°C

27°C

10.

Stokes law is valid only if the size of particle is

< 0.0002mm

Between 0.2mm and 0.0002mm

> 0.2mm

All of the above

Page 2 of 5

11.

Which of the following soils has the finest grains?

Silts

Fine sands

Sands

clays

12.

Group index of soil ranges such that

0 < GI < 20

0 <= GI <=25

0 < GI < ∞

0 <= GI <=20

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

aeolian soil

Colluvial soil

drift

loess

14.

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

Air content

None of these

Porosity

Void density

15.

Clay is generally

having large particle size

none of these

permeable

cohesive

16.

The soil transported by flowing water is called

marine soil

alluvial soil

aeolian soil

lacustrine soil

17.

Non-cohesive soil is

sand

none of these

clay

silt

18.

Most suitable method for drainage of fine grained soil is

deep well system

vacuum method

electro-osmosis method

well point system

19.

'Loess' is silty clay formed by the action of

wind

water

gravitational force

glacier

20.

The minimum size of grains of silt soil is about

0.06 mm

0.002 mm

0.3 mm

0.01 mm

Page 3 of 5

21.

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

Bentonite

Stiff clay

Organic clay

Dense sand

22.

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

Sand, silt, colloids, clay

Clay, silt, sand, colloids

Silt, sand, colloids, clay

Sand, silt, clay, colloids

23.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

< 0.075mm

4.75mm

24.

The soil transported by wind is called

lacustrine soil

marine soil

alluvial soil

aeolian soil

25.

The biggest size of clay particles is

0.0002mm

0.002mm

0.075mm

0.02mm

26.

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

Grading

Bulk density

Dry density

Relative density

27.

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

Constant density line

Zero-air voids line

Proctor curve

Azimuth

28.

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

plastic soil

fully saturated soil

moist soil

hydrated soil

29.

On adding bitumen to soil

cohesion of soil increases

water proofing improves

compaction becomes easy

voids get filled

30.

The specific gravity of sandy soils is

1.5

2.2

2.0

2.6

Page 4 of 5

31.

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

Unit weight of water

Degree of saturation

Moisture content

Density

32.

Silts have the following property

no plasticity

elasticity

limited plasticity

plasticity

33.

Darcy's law is not applicable for flow in

gravels

fine sands

clays

silts

34.

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.S/G

e= w.G/S

none of these

35.

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

Strain softening

Yielding

36.

The percentage of the porosity of compacted sand is about

15 to 30 %

5 to 15%

30 to 40 %

40 to 50 %

37.

Sedimentation analysis is used when size of particle is

4.75mm

< 0.075mm

0.01mm

> 0.75mm

38.

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

none of these

uniformly graded soil

well graded soil

poorly graded soil

39.

The effective size of a soil is

D40

D30

D20

D10

40.

Which of the following is a measure of particle size range

Effective size

None of the above

Uniformity coefficient

Coefficient of curvature

Page 5 of 5

41.

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

1.50 micron

2 mm

7.5 mm

4.75 mm

42.

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

Void ratio

Solid ratio

Void fraction

Porosity

43.

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

0.4-0.5

0.8-0.9

0.6-0.7

1.0-1.1

44.

'Talus' is the soil transported by

gravitational force

water

glacier

wind

45.

The friction offered by sand is equal to

Sliding friction

Rolling friction

All of the above

Resistance due to interlocking

46.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Clayey soil

Stratified soil

Silty soil

Sandy soil

Geotechnical Engineering MCQs Set-1

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