Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

2.

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.G/S

e= w/S.G

none of these

3.

Silts have the following property

limited plasticity

no plasticity

plasticity

elasticity

4.

The percentage of the porosity of compacted sand is about

15 to 30 %

40 to 50 %

5 to 15%

30 to 40 %

5.

The biggest size of clay particles is

0.02mm

0.002mm

0.0002mm

0.075mm

6.

Which of the following is a measure of particle size range

Effective size

Uniformity coefficient

Coefficient of curvature

None of the above

7.

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

8.

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

9.

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

10.

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

None of these

Moisture content

Capillarity

Permeability

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11.

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

well graded soil

none of these

uniformly graded soil

poorly graded soil

12.

'Talus' is the soil transported by

water

wind

glacier

gravitational force

13.

The IS classification of soils is

Textural classification

Highway research board classification

Particles size classification

Modified unified classification

14.

Sedimentation analysis is used when size of particle is

< 0.075mm

0.01mm

4.75mm

> 0.75mm

15.

The specific gravity of sandy soils is

2.0

2.6

2.2

1.5

16.

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

aeolian soil

loess

drift

17.

Undisturbed soil samples are obtained by

Thick walled samples

Augers

Thin walled samples

Direct excavations

18.

Most suitable method for drainage of fine grained soil is

vacuum method

deep well system

well point system

electro-osmosis method

19.

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

20.

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

Stiff clay

Bentonite

Organic clay

Dense sand

Page 3 of 5

21.

Sieve analysis is used when size of particle is

0.01mm

> 0.075mm

< 0.075mm

4.75mm

22.

Non-cohesive soil is

silt

clay

none of these

sand

23.

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

4.75 mm

0.075 mm

0.300 mm

0.150 mm

24.

As per IS the specific gravity of soil is determined at

17°C

10°C

27°C

47°C

25.

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

Bentonite

Loose sand

Dense sand

Stiff clay

26.

The effective size of a soil is

D10

D20

D30

D40

27.

The maximum size of grains of silt soil is about

2 mm

0.075 mm

0.1 mm

0.5 mm

28.

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

Unit weight of water

Density

Moisture content

Degree of saturation

29.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Stratified soil

Clayey soil

Sandy soil

Silty soil

30.

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

Void ratio

Void fraction

Porosity

Solid ratio

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31.

The minimum size of grains of silt soil is about

0.002 mm

0.06 mm

0.3 mm

0.01 mm

32.

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

Porosity

Air content

None of these

Void density

33.

On adding bitumen to soil

cohesion of soil increases

water proofing improves

voids get filled

compaction becomes easy

34.

Uniformity coefficient of soil is

<=1

>1

<1

=1

35.

Which of the following soils has the finest grains?

Fine sands

Sands

Silts

clays

36.

Clay is generally

cohesive

permeable

none of these

having large particle size

37.

Stokes law is valid only if the size of particle is

All of the above

Between 0.2mm and 0.0002mm

> 0.2mm

< 0.0002mm

38.

The soil transported by flowing water is called

aeolian soil

lacustrine soil

alluvial soil

marine soil

39.

The soil transported by wind is called

lacustrine soil

alluvial soil

marine soil

aeolian soil

40.

Group index of soil ranges such that

0 <= GI <=25

0 < GI < ∞

0 < GI < 20

0 <= GI <=20

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41.

Darcy's law is not applicable for flow in

silts

fine sands

gravels

clays

42.

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

0.6-0.7

1.0-1.1

0.4-0.5

0.8-0.9

43.

'Loess' is silty clay formed by the action of

water

wind

gravitational force

glacier

44.

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

Constant density line

Proctor curve

Zero-air voids line

Azimuth

45.

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

Clay, silt, sand, colloids

Sand, silt, clay, colloids

Silt, sand, colloids, clay

Sand, silt, colloids, clay

46.

The friction offered by sand is equal to

Sliding friction

Rolling friction

All of the above

Resistance due to interlocking

Geotechnical Engineering MCQs Set-1

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