SOIL MECHANICS AND FOUNDATION QUIZ

Within the consolidation process of a saturated clay

a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant

both neutral pressure and effective pressure increase

both neutral pressure and effective pressure decrease

a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant

TRUE ANSWER : ?
YOUR ANSWER : ?

If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

The liquid limit of soil always decreases

The liquid limit of soil always increases

The liquid limit of soil may decrease

The liquid limit of soil may increase

TRUE ANSWER : ?
YOUR ANSWER : ?

At liquid limit, all soils possess

same shear strength of large magnitude

different shear strengths of small magnitude

different shear strengths of large magnitude

same shear strength of small magnitude

TRUE ANSWER : ?
YOUR ANSWER : ?

Water content of soil can

be greater than 100 %

never be greater than 100 %

take values only from 0 % to 100 %

be less than 0 %

TRUE ANSWER : ?
YOUR ANSWER : ?

A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is

23.2 kN/m3

20.0 kN/m3

22.0 kN/m3

18.6 kN/m3

TRUE ANSWER : ?
YOUR ANSWER : ?

A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.2 N/ram2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is

25 mm

between 15 mm and 25 mm

15 mm

greater than 25 mm

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 an active state of plastic equilibrium

Inclined at 45° to the vertical plane

None of these

Vertical if the soil is in a passive state of plastic equilibrium

TRUE ANSWER : ?
YOUR ANSWER : ?

If the permeability of a soil is 0.8 mm/sec, the type of soil is

clay

silt

sand

gravel

TRUE ANSWER : ?
YOUR ANSWER : ?

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

increases

decreases

first increases and then decreases

remains unchanged

TRUE ANSWER : ?
YOUR ANSWER : ?

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

24 months

12 months

3 months

6 months

TRUE ANSWER : ?
YOUR ANSWER : ?

↑