Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

1.50 micron

7.5 mm

2 mm

4.75 mm

2.

The soil transported by flowing water is called

marine soil

lacustrine soil

aeolian soil

alluvial soil

3.

Group index of soil ranges such that

0 <= GI <=20

0 <= GI <=25

0 < GI < ∞

0 < GI < 20

4.

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

Void fraction

Porosity

Void ratio

Solid ratio

5.

Which of the following soils has the finest grains?

Fine sands

clays

Sands

Silts

6.

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

uniformly graded soil

poorly graded soil

none of these

well graded soil

7.

As per IS the specific gravity of soil is determined at

10°C

47°C

17°C

27°C

8.

Non-cohesive soil is

clay

silt

none of these

sand

9.

'Loess' is silty clay formed by the action of

glacier

wind

gravitational force

water

10.

The soil transported by wind is called

alluvial soil

marine soil

aeolian soil

lacustrine soil

Page 2 of 5

11.

The percentage of the porosity of compacted sand is about

5 to 15%

30 to 40 %

40 to 50 %

15 to 30 %

12.

The friction offered by sand is equal to

Rolling friction

Resistance due to interlocking

Sliding friction

All of the above

13.

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

Sand, silt, colloids, clay

Silt, sand, colloids, clay

14.

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

Azimuth

Proctor curve

Constant density line

Zero-air voids line

15.

The minimum size of grains of silt soil is about

0.06 mm

0.01 mm

0.002 mm

0.3 mm

16.

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

Dense sand

Stiff clay

Bentonite

Organic clay

17.

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

Permeability

Capillarity

Moisture content

None of these

18.

Clay is generally

permeable

cohesive

none of these

having large particle size

19.

The relation between void ratio e, water content w, specific gravity G, and degree of saturation S, for a soil sample is

e= w.G/S

none of these

e= w.S/G

e= w/S.G

20.

Sieve analysis is used when size of particle is

> 0.075mm

< 0.075mm

4.75mm

0.01mm

Page 3 of 5

21.

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

Relative density

Dry density

Grading

Bulk density

22.

'Talus' is the soil transported by

wind

gravitational force

water

glacier

23.

Undisturbed soil samples are obtained by

Direct excavations

Augers

Thick walled samples

Thin walled samples

24.

Most suitable method for drainage of fine grained soil is

well point system

deep well system

vacuum method

electro-osmosis method

25.

Uniformity coefficient of soil is

<=1

>1

<1

=1

26.

Sedimentation analysis is used when size of particle is

< 0.075mm

0.01mm

> 0.75mm

4.75mm

27.

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

Porosity

Air content

None of these

Void density

28.

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

Degree of saturation

Density

Moisture content

Unit weight of water

29.

The effective size of a soil is

D30

D10

D20

D40

30.

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

Page 4 of 5

31.

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

Yielding

Strain hardening

Plasticity

32.

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

Bentonite

Loose sand

Stiff clay

Dense sand

33.

A flat grain size distribution curve shows a

Uniform grain size

Wide range of grain size

Narrow range of grain size

Grain size from two representative fractions

34.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Clayey soil

Sandy soil

Silty soil

Stratified soil

35.

The IS classification of soils is

Modified unified classification

Textural classification

Particles size classification

Highway research board classification

36.

The maximum size of grains of silt soil is about

0.075 mm

2 mm

0.1 mm

0.5 mm

37.

The specific gravity of sandy soils is

1.5

2.0

2.6

2.2

38.

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

0.075 mm

0.300 mm

4.75 mm

0.150 mm

39.

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

0.4-0.5

0.6-0.7

0.8-0.9

1.0-1.1

40.

Which of the following is a measure of particle size range

Effective size

Coefficient of curvature

None of the above

Uniformity coefficient

Page 5 of 5

41.

The biggest size of clay particles is

0.02mm

0.075mm

0.002mm

0.0002mm

42.

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

loess

drift

aeolian soil

43.

Darcy's law is not applicable for flow in

silts

gravels

clays

fine sands

44.

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

45.

Silts have the following property

limited plasticity

plasticity

elasticity

no plasticity

46.

On adding bitumen to soil

voids get filled

cohesion of soil increases

water proofing improves

compaction becomes easy

Geotechnical Engineering MCQs Set-1

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