Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

Clay is generally

permeable

cohesive

none of these

having large particle size

2.

Uniformity coefficient of soil is

<1

=1

<=1

>1

3.

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

4.

The biggest size of clay particles is

0.075mm

0.002mm

0.02mm

0.0002mm

5.

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

0.8-0.9

1.0-1.1

6.

The soil transported by flowing water is called

aeolian soil

lacustrine soil

alluvial soil

marine soil

7.

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

Void density

Porosity

Air content

None of these

8.

The effective size of a soil is

D30

D40

D20

D10

9.

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

Degree of saturation

Unit weight of water

Moisture content

Density

10.

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

Page 2 of 5

11.

Which of the following soils has the finest grains?

Fine sands

clays

Sands

Silts

12.

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

poorly graded soil

uniformly graded soil

well graded soil

none of these

13.

The IS classification of soils is

Particles size classification

Textural classification

Modified unified classification

Highway research board classification

14.

The friction offered by sand is equal to

Rolling friction

All of the above

Resistance due to interlocking

Sliding friction

15.

The percentage of the porosity of compacted sand is about

5 to 15%

15 to 30 %

40 to 50 %

30 to 40 %

16.

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

Relative density

Grading

Bulk density

Dry density

17.

On adding bitumen to soil

water proofing improves

cohesion of soil increases

voids get filled

compaction becomes easy

18.

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

Sand, silt, clay, colloids

Clay, silt, sand, colloids

Sand, silt, colloids, clay

Silt, sand, colloids, clay

19.

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

Organic clay

Bentonite

Dense sand

Stiff clay

20.

Non-cohesive soil is

clay

sand

silt

none of these

Page 3 of 5

21.

'Talus' is the soil transported by

gravitational force

glacier

wind

water

22.

Silts have the following property

limited plasticity

elasticity

plasticity

no plasticity

23.

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

24.

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

Loose sand

Stiff clay

Bentonite

Dense sand

25.

Which of the following is a measure of particle size range

Coefficient of curvature

None of the above

Effective size

Uniformity coefficient

26.

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

27.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

4.75mm

< 0.075mm

28.

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

29.

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

Void fraction

Porosity

Solid ratio

Void ratio

30.

Undisturbed soil samples are obtained by

Augers

Thin walled samples

Thick walled samples

Direct excavations

Page 4 of 5

31.

The specific gravity of sandy soils is

2.6

2.2

2.0

1.5

32.

Sedimentation analysis is used when size of particle is

0.01mm

< 0.075mm

> 0.75mm

4.75mm

33.

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

34.

'Loess' is silty clay formed by the action of

gravitational force

water

glacier

wind

35.

The soil transported by wind is called

lacustrine soil

marine soil

aeolian soil

alluvial soil

36.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Stratified soil

Sandy soil

Clayey soil

Silty soil

37.

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

None of these

Capillarity

Permeability

Moisture content

38.

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

1.50 micron

7.5 mm

4.75 mm

2 mm

39.

Most suitable method for drainage of fine grained soil is

well point system

electro-osmosis method

vacuum method

deep well system

40.

The minimum size of grains of silt soil is about

0.3 mm

0.01 mm

0.06 mm

0.002 mm

Page 5 of 5

41.

Darcy's law is not applicable for flow in

gravels

clays

silts

fine sands

42.

The maximum size of grains of silt soil is about

2 mm

0.075 mm

0.5 mm

0.1 mm

43.

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

44.

As per IS the specific gravity of soil is determined at

10°C

27°C

47°C

17°C

45.

Group index of soil ranges such that

0 <= GI <=25

0 <= GI <=20

0 < GI < 20

0 < GI < ∞

46.

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

Proctor curve

Constant density line

Azimuth

Zero-air voids line

Geotechnical Engineering MCQs Set-1

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