Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

The IS classification of soils is

Modified unified classification

Highway research board classification

Textural classification

Particles size classification

2.

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

Dry density

Relative density

Grading

Bulk density

3.

Uniformity coefficient of soil is

=1

>1

<1

<=1

4.

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

Degree of saturation

Moisture content

Unit weight of water

Density

5.

Sedimentation analysis is used when size of particle is

< 0.075mm

> 0.75mm

0.01mm

4.75mm

6.

Most suitable method for drainage of fine grained soil is

electro-osmosis method

vacuum method

well point system

deep well system

7.

Silts have the following property

elasticity

no plasticity

limited plasticity

plasticity

8.

Which of the following is a measure of particle size range

Uniformity coefficient

None of the above

Effective size

Coefficient of curvature

9.

The maximum size of grains of silt soil is about

0.5 mm

0.075 mm

2 mm

0.1 mm

10.

Clay is generally

none of these

having large particle size

permeable

cohesive

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11.

On adding bitumen to soil

voids get filled

water proofing improves

cohesion of soil increases

compaction becomes easy

12.

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

Organic clay

Bentonite

Stiff clay

Dense sand

13.

Darcy's law is not applicable for flow in

clays

fine sands

silts

gravels

14.

The minimum size of grains of silt soil is about

0.06 mm

0.3 mm

0.002 mm

0.01 mm

15.

As per IS the specific gravity of soil is determined at

27°C

10°C

17°C

47°C

16.

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

none of these

e= w/S.G

17.

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

18.

The effective size of a soil is

D40

D20

D10

D30

19.

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

20.

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

None of these

Void density

Porosity

Air content

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21.

The biggest size of clay particles is

0.02mm

0.075mm

0.0002mm

0.002mm

22.

Undisturbed soil samples are obtained by

Augers

Thin walled samples

Thick walled samples

Direct excavations

23.

Which of the following soils has the finest grains?

Sands

clays

Fine sands

Silts

24.

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

Moisture content

None of these

Capillarity

Permeability

25.

The soil transported by wind is called

alluvial soil

lacustrine soil

marine soil

aeolian soil

26.

The specific gravity of sandy soils is

2.2

1.5

2.6

2.0

27.

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

0.6-0.7

0.4-0.5

1.0-1.1

0.8-0.9

28.

The friction offered by sand is equal to

All of the above

Resistance due to interlocking

Sliding friction

Rolling friction

29.

The soil transported by flowing water is called

alluvial soil

aeolian soil

marine soil

lacustrine soil

30.

'Talus' is the soil transported by

wind

water

glacier

gravitational force

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31.

Non-cohesive soil is

sand

silt

clay

none of these

32.

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

Void ratio

Porosity

Solid ratio

Void fraction

33.

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

34.

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

Zero-air voids line

Proctor curve

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

Strain hardening

Plasticity

Yielding

Strain softening

36.

The percentage of the porosity of compacted sand is about

15 to 30 %

30 to 40 %

5 to 15%

40 to 50 %

37.

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

4.75 mm

1.50 micron

2 mm

7.5 mm

38.

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

Bentonite

Stiff clay

Dense sand

Loose sand

39.

A flat grain size distribution curve shows a

Narrow range of grain size

Wide range of grain size

Uniform grain size

Grain size from two representative fractions

40.

Sieve analysis is used when size of particle is

4.75mm

0.01mm

< 0.075mm

> 0.075mm

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41.

Stokes law is valid only if the size of particle is

All of the above

> 0.2mm

< 0.0002mm

Between 0.2mm and 0.0002mm

42.

Group index of soil ranges such that

0 < GI < ∞

0 <= GI <=25

0 < GI < 20

0 <= GI <=20

43.

'Loess' is silty clay formed by the action of

wind

water

glacier

gravitational force

44.

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

hydrated soil

plastic soil

fully saturated soil

moist soil

45.

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

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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