Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

Clay, silt, sand, colloids

Silt, sand, colloids, clay

2.

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

Proctor curve

Zero-air voids line

3.

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

Air content

Void density

Porosity

None of these

4.

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

4.75 mm

0.300 mm

0.150 mm

0.075 mm

5.

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

6.

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

Capillarity

Moisture content

Permeability

None of these

7.

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

Dry density

Bulk density

Grading

Relative density

8.

Clay is generally

cohesive

none of these

permeable

having large particle size

9.

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

Bentonite

Loose sand

Dense sand

Stiff clay

10.

Group index of soil ranges such that

0 < GI < 20

0 < GI < ∞

0 <= GI <=20

0 <= GI <=25

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11.

The maximum size of grains of silt soil is about

2 mm

0.5 mm

0.075 mm

0.1 mm

12.

The specific gravity of sandy soils is

1.5

2.6

2.2

2.0

13.

Darcy's law is not applicable for flow in

silts

fine sands

clays

gravels

14.

Non-cohesive soil is

clay

sand

silt

none of these

15.

Which of the following is a measure of particle size range

Uniformity coefficient

Coefficient of curvature

Effective size

None of the above

16.

On adding bitumen to soil

cohesion of soil increases

voids get filled

compaction becomes easy

water proofing improves

17.

Uniformity coefficient of soil is

<1

>1

=1

<=1

18.

The effective size of a soil is

D20

D30

D10

D40

19.

As per IS the specific gravity of soil is determined at

17°C

47°C

27°C

10°C

20.

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

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21.

A flat grain size distribution curve shows a

Uniform grain size

Grain size from two representative fractions

Wide range of grain size

Narrow range of grain size

22.

Stokes law is valid only if the size of particle is

< 0.0002mm

All of the above

Between 0.2mm and 0.0002mm

> 0.2mm

23.

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

moist soil

hydrated soil

fully saturated soil

plastic soil

24.

The IS classification of soils is

Highway research board classification

Textural classification

Modified unified classification

Particles size classification

25.

Sedimentation analysis is used when size of particle is

> 0.75mm

4.75mm

0.01mm

< 0.075mm

26.

Undisturbed soil samples are obtained by

Thick walled samples

Direct excavations

Augers

Thin walled samples

27.

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

1.0-1.1

0.6-0.7

0.4-0.5

0.8-0.9

28.

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

Void fraction

Solid ratio

Void ratio

Porosity

29.

The biggest size of clay particles is

0.002mm

0.0002mm

0.075mm

0.02mm

30.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Sandy soil

Silty soil

Stratified soil

Clayey soil

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31.

The soil transported by flowing water is called

marine soil

alluvial soil

aeolian soil

lacustrine soil

32.

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

Colluvial soil

drift

aeolian soil

loess

33.

The friction offered by sand is equal to

Sliding friction

All of the above

Resistance due to interlocking

Rolling friction

34.

The minimum size of grains of silt soil is about

0.06 mm

0.002 mm

0.3 mm

0.01 mm

35.

Silts have the following property

no plasticity

elasticity

plasticity

limited plasticity

36.

Sieve analysis is used when size of particle is

< 0.075mm

4.75mm

> 0.075mm

0.01mm

37.

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.G/S

e= w.S/G

38.

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

39.

The soil transported by wind is called

aeolian soil

alluvial soil

marine soil

lacustrine soil

40.

Most suitable method for drainage of fine grained soil is

electro-osmosis method

vacuum method

deep well system

well point system

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41.

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

Stiff clay

Organic clay

Bentonite

Dense sand

42.

Which of the following soils has the finest grains?

Silts

Fine sands

clays

Sands

43.

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

Density

Degree of saturation

Unit weight of water

Moisture content

44.

'Talus' is the soil transported by

water

glacier

gravitational force

wind

45.

'Loess' is silty clay formed by the action of

wind

gravitational force

glacier

water

46.

The percentage of the porosity of compacted sand is about

5 to 15%

15 to 30 %

40 to 50 %

30 to 40 %

Geotechnical Engineering MCQs Set-1

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