SOIL MECHANICS AND FOUNDATION QUIZ

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

TRUE ANSWER : ?
YOUR ANSWER : ?

If the shearing stress is zero on two planes, then the angle between the two planes is

135°

45°

225°

90°

TRUE ANSWER : ?
YOUR ANSWER : ?

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

both cohesion and angle of internal friction

TRUE ANSWER : ?
YOUR ANSWER : ?

In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear

first increases and then decreases

decreases

increases

remains unchanged

TRUE ANSWER : ?
YOUR ANSWER : ?

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 a passive state of plastic equilibrium

Inclined at 45° to the vertical plane

None of these

Vertical if the soil is in an active state of plastic equilibrium

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following clays behaves like a dense sand ?

over-consolidated clay with a low over-consolidation ratio

over-consolidated ciay with a high over-consolidation ratio

normally consolidated clay

under-consolidated clay

TRUE ANSWER : ?
YOUR ANSWER : ?

Terzaghi’s theory of one dimensional consolidation assumes

All listed here

Soil is homogeneous and fully saturated

Water and soil particles are incompressible

Deformation of the soil, is entirely due to change in volume

TRUE ANSWER : ?
YOUR ANSWER : ?

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

22.5°

0°

90°

45°

TRUE ANSWER : ?
YOUR ANSWER : ?

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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

0 ≤ S ≤ 100

S > 0

S < 0

0 < S < 100

TRUE ANSWER : ?
YOUR ANSWER : ?

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