Practice Soil Mechanics And Foundation Multiple Choice Questions Quiz-3 - MCQGeeks.com

Q.1

Which of the following methods is more suitable for the determination of permeability of clayey soil ?

constant head method
falling head method
horizontal permeability test
none of the above

Q.2

A pycnometer is used to determine

water content and voids ratio
specific gravity and dry density
water content and specific gravity
voids ratio and dry density

Q.3

Effective stress on soil

Increases voids ratio and decreases permeability
Increases both voids ratio and permeability
Decreases both voids ratio and permeability
Decreases voids ratio and increases permeability

Q.4

The ultimate consolidation settlement of a structure resting on a soil

Decreases with the increase in the initial voids ratio
Decreases with the decrease in the plastic limit
Increases with the increase in the initial voids ratio
Increases with the decrease in the porosity of the soil

Q.5

The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in an active state of plastic equilibrium
Vertical if the soil is in a passive state of plastic equilibrium
Inclined at 45° to the vertical plane
None of the above

Q.6

Terzaghi’s bearing capacity factors Nc, Nq and Nr are functions of

cohesion only
angle of internal friction only
both cohesion and angle of internal friction
none of the above

Q.7

Valid range for S, the degree of saturation of soil in percentage is

S > 0
S < 0
0 < S < 100
0 ≤ S ≤ 100

Q.8

If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is

less than specific gravity of soil
equal to specific gravity of soil
greater than specific gravity of soil
independent of specific gravity of soil

Q.9

Relative density of a compacted dense sand is approximately equal to

0.4
0.6
0.95
1.20

Q.10

Stoke’s law is valid only if the size of particle is

less than 0.0002 mm
greater than 0.2 mm
between 0.2 mm and 0.0002 mm
all of the above

Q.11

If the plasticity index of a soil mass is zero, the soil is

sand
silt
clay
clayey silt

Q.12

The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

1.0m
1.5m
2.0m
3m

Q.13

Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is

3 months
6 months
12 months
24 months

Q.14

Degree of consolidation is

directly proportional to time and inversely proportional to drainage path
directly proportional to time and inversely proportional to square of drainage path
directly proportional to drainage path and inversely proportional to time
directly proportional to square of drainage path and inversely proportional to time

Q.15

The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is

1/3
3
1
1/2

Q.16

In hydrometer analysis for a soil mass

both meniscus correction and dispersing agent correction are additive
both meniscus correction and dispersing agent correction are subtractive
meniscus correction is additive and dispersing agent correction is subtractive
meniscus correction is subtractive and dispersing agent correction is additive

Q.17

In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on

horizontal plane only
vertical plane only
both horizontal and vertical planes
all planes except horizontal and vertical planes

Q.18

The slope of isochrone at any point at a given time indicates the rate of change of

effective stress with time
effective stress with depth
pore water pressure with depth
pore water pressure with time

Q.19

When the degree of saturation is zero, the soil mass under consideration represents

one phase system
two phase system with soil and air
two phase system with soil and water
three phase system

Q.20

Which of the following types of soil is transported by gravitational forces ?

loess
talus
drift
dune sand

Q.21

If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is

90°
45°
22.5°
0°

Q.22

If the water table rises upto ground surface, then the

effective stress is reduced due to decrease in total stress only but pore water pressure does not change
effective stress is reduced due to increase in pore water pressure only but total stress does not change
total stress is reduced due to increase in pore water pressure only but effective stress does not change
total stress is increased due to decrease in pore water pressure but effective stress does not change

Q.23

Total number of stress components at a point within a soil mass loaded at its boundary is

3
6
9
16

Q.24

Constant head permeameter is used to test permeability of

silt
clay
coarse sand
fine sand

Q.25

Skempton’s pore pressure coefficient B for saturated soil is

1
zero
between 0 and 1
greater than 1 [CS 95]

Q.26

According to IS classification, the range of silt size particles is

4.75 mm to 2.00 mm
2.00 mm to 0.425 mm
0.425 mm to 0.075 mm
0.075 mm to 0.002 mm

Q.27

If the voids of a soil mass are full of air only, the soil is termed as

air entrained soil
partially saturated soil
dry soil
dehydrated soil

Q.28

If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in

liquid state
plastic state
semi-solid state
solid state

Q.29

Select the correct range of density index,1_D

1_D > 0
I_D > 0
0 < 1_D < 1
0 ≤ 1_D ≤ 1

Q.30

For a loose sand sample and a dense sand sample consolidated to the same effective stress

ultimate strength is same and also peak strength is same
ultimate strength is different but peak strength is same
ultimate strength is same but peak strength of dense sand is greater than that of loose sand
ultimate strength is same but peak

0 h : 0 m : 1 s