Geotechnical Engineering MCQs Set-1

Page 1 of 5

1.

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

Solid ratio

Void fraction

Void ratio

Porosity

2.

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

None of these

Moisture content

Capillarity

Permeability

3.

The specific gravity of sandy soils is

2.2

2.6

2.0

1.5

4.

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

1.0-1.1

0.8-0.9

0.4-0.5

0.6-0.7

5.

On adding bitumen to soil

water proofing improves

voids get filled

compaction becomes easy

cohesion of soil increases

6.

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

Silt, sand, colloids, clay

Sand, silt, colloids, clay

Sand, silt, clay, colloids

Clay, silt, sand, colloids

7.

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

plastic soil

moist soil

fully saturated soil

hydrated soil

8.

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

e= w.S/G

e= w/S.G

none of these

9.

The maximum size of grains of silt soil is about

0.075 mm

2 mm

0.5 mm

0.1 mm

10.

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

Stiff clay

Bentonite

Organic clay

Dense sand

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11.

The biggest size of clay particles is

0.0002mm

0.075mm

0.02mm

0.002mm

12.

The IS classification of soils is

Textural classification

Modified unified classification

Particles size classification

Highway research board classification

13.

Undisturbed soil samples are obtained by

Thin walled samples

Thick walled samples

Augers

Direct excavations

14.

Which of the following soils has the finest grains?

Sands

Silts

clays

Fine sands

15.

As per IS the specific gravity of soil is determined at

47°C

10°C

17°C

27°C

16.

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

Relative density

Grading

Dry density

Bulk density

17.

Stokes law is valid only if the size of particle is

> 0.2mm

Between 0.2mm and 0.0002mm

< 0.0002mm

All of the above

18.

Group index of soil ranges such that

0 <= GI <=25

0 < GI < 20

0 < GI < ∞

0 <= GI <=20

19.

The friction offered by sand is equal to

Sliding friction

Rolling friction

All of the above

Resistance due to interlocking

20.

Darcy's law is not applicable for flow in

clays

silts

fine sands

gravels

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21.

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

Porosity

Air content

Void density

None of these

22.

The soil transported by wind is called

alluvial soil

lacustrine soil

aeolian soil

marine soil

23.

Most suitable method for drainage of fine grained soil is

deep well system

well point system

electro-osmosis method

vacuum method

24.

Sedimentation analysis is used when size of particle is

0.01mm

< 0.075mm

> 0.75mm

4.75mm

25.

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

26.

'Talus' is the soil transported by

glacier

wind

water

gravitational force

27.

A flat grain size distribution curve shows a

Grain size from two representative fractions

Uniform grain size

Wide range of grain size

Narrow range of grain size

28.

The effective size of a soil is

D40

D20

D30

D10

29.

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

7.5 mm

2 mm

4.75 mm

1.50 micron

30.

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

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31.

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

poorly graded soil

well graded soil

32.

Westergaards analysis for stress distribution beneath loaded area is applicable to

Stratified soil

Silty soil

Clayey soil

Sandy soil

33.

'Loess' is silty clay formed by the action of

water

gravitational force

wind

glacier

34.

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

Unit weight of water

Degree of saturation

Density

Moisture content

35.

The minimum size of grains of silt soil is about

0.002 mm

0.06 mm

0.3 mm

0.01 mm

36.

Clay is generally

cohesive

none of these

having large particle size

permeable

37.

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

Proctor curve

Zero-air voids line

38.

The percentage of the porosity of compacted sand is about

15 to 30 %

40 to 50 %

5 to 15%

30 to 40 %

39.

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

0.150 mm

4.75 mm

0.075 mm

0.300 mm

40.

Sieve analysis is used when size of particle is

> 0.075mm

0.01mm

< 0.075mm

4.75mm

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41.

Silts have the following property

elasticity

plasticity

limited plasticity

no plasticity

42.

Non-cohesive soil is

sand

none of these

clay

silt

43.

The soil transported by flowing water is called

aeolian soil

alluvial soil

marine soil

lacustrine soil

44.

Uniformity coefficient of soil is

<=1

<1

>1

=1

45.

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

Dense sand

Loose sand

Bentonite

Stiff clay

46.

Which of the following is a measure of particle size range

None of the above

Coefficient of curvature

Effective size

Uniformity coefficient

Geotechnical Engineering MCQs Set-1

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