Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

Porosity

None of these

Void density

Air content

2.

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

3.

The effective size of a soil is

D30

D10

D20

D40

4.

The soil transported by flowing water is called

lacustrine soil

marine soil

alluvial soil

aeolian soil

5.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Sandy soil

Stratified soil

Silty soil

Clayey soil

6.

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

7.

A flat grain size distribution curve shows a

Grain size from two representative fractions

Wide range of grain size

Narrow range of grain size

Uniform grain size

8.

The specific gravity of sandy soils is

2.6

2.2

1.5

2.0

9.

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

loess

Colluvial soil

drift

aeolian soil

10.

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

Unit weight of water

Moisture content

Degree of saturation

Density

Page 2 of 5

11.

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

Dense sand

Bentonite

Stiff clay

Loose sand

12.

Clay is generally

permeable

none of these

having large particle size

cohesive

13.

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

Silt, sand, colloids, clay

Sand, silt, colloids, clay

14.

As per IS the specific gravity of soil is determined at

10°C

27°C

17°C

47°C

15.

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

2 mm

7.5 mm

1.50 micron

4.75 mm

16.

The biggest size of clay particles is

0.002mm

0.02mm

0.075mm

0.0002mm

17.

Non-cohesive soil is

silt

none of these

clay

sand

18.

Most suitable method for drainage of fine grained soil is

deep well system

electro-osmosis method

well point system

vacuum method

19.

The IS classification of soils is

Textural classification

Particles size classification

Highway research board classification

Modified unified classification

20.

The percentage of the porosity of compacted sand is about

5 to 15%

15 to 30 %

30 to 40 %

40 to 50 %

Page 3 of 5

21.

Which of the following is a measure of particle size range

None of the above

Effective size

Uniformity coefficient

Coefficient of curvature

22.

The maximum size of grains of silt soil is about

0.5 mm

0.1 mm

0.075 mm

2 mm

23.

Darcy's law is not applicable for flow in

gravels

silts

clays

fine sands

24.

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

Zero-air voids line

Proctor curve

Constant density line

Azimuth

25.

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

26.

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

27.

Group index of soil ranges such that

0 < GI < ∞

0 < GI < 20

0 <= GI <=20

0 <= GI <=25

28.

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

Bulk density

Dry density

Relative density

Grading

29.

'Loess' is silty clay formed by the action of

gravitational force

glacier

water

wind

30.

Sieve analysis is used when size of particle is

4.75mm

0.01mm

< 0.075mm

> 0.075mm

Page 4 of 5

31.

The friction offered by sand is equal to

Rolling friction

Resistance due to interlocking

All of the above

Sliding friction

32.

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

0.8-0.9

0.6-0.7

1.0-1.1

0.4-0.5

33.

Silts have the following property

elasticity

limited plasticity

plasticity

no plasticity

34.

On adding bitumen to soil

compaction becomes easy

cohesion of soil increases

water proofing improves

voids get filled

35.

The soil transported by wind is called

marine soil

lacustrine soil

alluvial soil

aeolian soil

36.

Uniformity coefficient of soil is

=1

<1

<=1

>1

37.

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

Void fraction

Void ratio

Porosity

Solid ratio

38.

Sedimentation analysis is used when size of particle is

< 0.075mm

0.01mm

4.75mm

> 0.75mm

39.

Undisturbed soil samples are obtained by

Thick walled samples

Thin walled samples

Augers

Direct excavations

40.

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

Permeability

None of these

Capillarity

Moisture content

Page 5 of 5

41.

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 softening

Plasticity

Yielding

Strain hardening

42.

Which of the following soils has the finest grains?

Sands

clays

Fine sands

Silts

43.

The minimum size of grains of silt soil is about

0.01 mm

0.06 mm

0.3 mm

0.002 mm

44.

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

Organic clay

Bentonite

Dense sand

Stiff clay

45.

'Talus' is the soil transported by

glacier

water

gravitational force

wind

46.

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

0.150 mm

0.075 mm

0.300 mm

4.75 mm

Geotechnical Engineering MCQs Set-1

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