SOIL MECHANICS AND FOUNDATION QUIZ

The ultimate consolidation settlement of a structure resting on a soil

Increases with the increase in the initial voids ratio

Increases with the decrease in the porosity of the soil

Decreases with the increase in the initial voids ratio

Decreases with the decrease in the plastic limit

TRUE ANSWER : ?
YOUR ANSWER : ?

Sensitivity of a soil can be defined as

None of these

ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

ratio of volume of voids to volume of solids

percentage of volume change of soil under saturated condition

TRUE ANSWER : ?
YOUR ANSWER : ?

If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are

0.5 and 1.0

1.0 and 0.0

0.0 and 1.0

1.0 and 0.5

TRUE ANSWER : ?
YOUR ANSWER : ?

A fully saturated soil is said to be

three phase system

two phase system with soil and air

one phase system

two phase system with soil and water

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a measure of particle size range ?

uniformity coefficient

coefficient of curvature

None of these

effective size

TRUE ANSWER : ?
YOUR ANSWER : ?

A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of

7°

17°

10°

12°

TRUE ANSWER : ?
YOUR ANSWER : ?

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

over-consolidated clay with a low over-consolidation ratio

normally consolidated clay

over-consolidated ciay with a high over-consolidation ratio

under-consolidated clay

TRUE ANSWER : ?
YOUR ANSWER : ?

Voids ratio of a soil mass can

never be greater than unity

be zero

take any value greater than zero

take values between 0 and 1 only

TRUE ANSWER : ?
YOUR ANSWER : ?

A tri-axial shear test is preferred to direct shear test, because

It can be performed under all three drainage conditions with complete control

None of these

Stress distribution on the failure plane, is non uniform

Precise measurement of pore pressure and change in volume during test, is not possible

TRUE ANSWER : ?
YOUR ANSWER : ?

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

solid state

plastic state

semi-solid state

TRUE ANSWER : ?
YOUR ANSWER : ?

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