Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

Dense sand

Bentonite

Stiff clay

Organic clay

2.

A flat grain size distribution curve shows a

Grain size from two representative fractions

Uniform grain size

Narrow range of grain size

Wide range of grain size

3.

On adding bitumen to soil

water proofing improves

compaction becomes easy

voids get filled

cohesion of soil increases

4.

As per IS the specific gravity of soil is determined at

27°C

47°C

17°C

10°C

5.

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

Void ratio

Porosity

Solid ratio

Void fraction

6.

Uniformity coefficient of soil is

<1

>1

=1

<=1

7.

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

Air content

Void density

Porosity

None of these

8.

Group index of soil ranges such that

0 <= GI <=20

0 < GI < 20

0 < GI < ∞

0 <= GI <=25

9.

The IS classification of soils is

Particles size classification

Textural classification

Modified unified classification

Highway research board classification

10.

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

poorly graded soil

well graded soil

Page 2 of 5

11.

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

12.

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

Permeability

None of these

Capillarity

Moisture content

13.

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

hydrated soil

fully saturated soil

plastic soil

moist soil

14.

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

0.075 mm

0.300 mm

0.150 mm

4.75 mm

15.

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

Dense sand

Bentonite

Loose sand

Stiff clay

16.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Silty soil

Sandy soil

Clayey soil

Stratified soil

17.

Which of the following is a measure of particle size range

Uniformity coefficient

Coefficient of curvature

None of the above

Effective size

18.

Undisturbed soil samples are obtained by

Thick walled samples

Augers

Thin walled samples

Direct excavations

19.

Most suitable method for drainage of fine grained soil is

well point system

electro-osmosis method

vacuum method

deep well system

20.

The minimum size of grains of silt soil is about

0.01 mm

0.06 mm

0.002 mm

0.3 mm

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21.

Sieve analysis is used when size of particle is

< 0.075mm

4.75mm

0.01mm

> 0.075mm

22.

The biggest size of clay particles is

0.0002mm

0.075mm

0.02mm

0.002mm

23.

The specific gravity of sandy soils is

2.6

2.0

1.5

2.2

24.

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

Yielding

Strain softening

25.

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

7.5 mm

4.75 mm

1.50 micron

2 mm

26.

The soil transported by flowing water is called

lacustrine soil

aeolian soil

marine soil

alluvial soil

27.

The maximum size of grains of silt soil is about

0.1 mm

0.5 mm

2 mm

0.075 mm

28.

Clay is generally

permeable

having large particle size

none of these

cohesive

29.

'Talus' is the soil transported by

glacier

water

wind

gravitational force

30.

Darcy's law is not applicable for flow in

silts

gravels

fine sands

clays

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31.

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

32.

Non-cohesive soil is

sand

none of these

silt

clay

33.

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

34.

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

35.

Sedimentation analysis is used when size of particle is

0.01mm

< 0.075mm

> 0.75mm

4.75mm

36.

The friction offered by sand is equal to

Resistance due to interlocking

Sliding friction

Rolling friction

All of the above

37.

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

Grading

Bulk density

Relative density

Dry density

38.

The effective size of a soil is

D20

D30

D40

D10

39.

Silts have the following property

no plasticity

elasticity

plasticity

limited plasticity

40.

'Loess' is silty clay formed by the action of

gravitational force

glacier

water

wind

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41.

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

Sand, silt, clay, colloids

Silt, sand, colloids, clay

42.

Which of the following soils has the finest grains?

Silts

Sands

Fine sands

clays

43.

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

aeolian soil

Colluvial soil

loess

44.

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

Degree of saturation

Unit weight of water

Density

Moisture content

45.

The soil transported by wind is called

marine soil

aeolian soil

alluvial soil

lacustrine soil

46.

The percentage of the porosity of compacted sand is about

15 to 30 %

5 to 15%

30 to 40 %

40 to 50 %

Geotechnical Engineering MCQs Set-1

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