Define Liquid limit, Plastic Limit, Shrinkage limit and Plasticity index.

Define Liquid limit, Plastic Limit, Shrinkage limit and Plasticity index.
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Answer :

Liquid limit (WL) - It is minimum water content at which two separated grooved soil parts mixed together under 25 blows of casagrande’s liquid limit apparatus; is called as liquid limit.


Plastic limit (Wp )– It is minimum water content at which soil begins to crumble into parts when it is rolled into 3 mm diameter thread; is known as Plastic limit.


Shrinkage limit (Ws) - It is maximum water content at which there is no reduction in volume of soil due to further decrease in water content is termed as shrinkage limit.


Plasticity index (IP): It is the range of water content over which a soil exhibits plasticity. It is the numerical difference between the liquid limit (WL) and plastic limit (Wp).

IP = WL – Wp


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Related questions

Define: (i) Consistency limit (ii) Liquid limit (iii) Plastic limit (iv) Shrinkage limit

Description : Define: (i) Consistency limit (ii) Liquid limit (iii) Plastic limit (iv) Shrinkage limit

Last Answer : 1. Consistency Limit: The water content at which the soil passes from one state to the another state is called as consistency limit.  2. Liquid Limit: It is defined as the maximum water ... water content at which further reduction in water content will not cause decrease in volume of soil mass. 

The plasticity index is the numerical difference between (A) Liquid limit and plastic limit (B) Plastic limit and shrinkage limit (C) Liquid limit and shrinkage limit (D) None of these

Description : The plasticity index is the numerical difference between (A) Liquid limit and plastic limit (B) Plastic limit and shrinkage limit (C) Liquid limit and shrinkage limit (D) None of these

Last Answer : (A) Liquid limit and plastic limit

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Last Answer : Answer: Option A

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Last Answer : Answer: Option D

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Description : The numerical difference between the liquid limit and plastic limit of a soil is known as a) Liquidity index b) Plasticity index * c) Shrinkage index d) Consistency index

Last Answer : b) Plasticity index *

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Description : Define plasticity index and classify soil on its basis.

Last Answer : a) Plasticity index (Ip) It is give measure of degree of plasticity of soil. It is difference be liquid limit and plastic limit Ip = WL - Wp Greater plasticity index, the greater is degree of plasticity of the soil. ... based on Ip i) Non plastic soil  If wp = o        Ip = wL ii) Plastic soil

The liquidity index is defined as a ratio expressed as percentage of (A) Plastic limit minus the natural water content, to its plasticity index (B) Natural water content minus its plastic limit to its plasticity index (C) Natural water content plus its plastic limit to its plasticity index (D) Liquid limit minus the natural water content to the plasticity index

Description : The liquidity index is defined as a ratio expressed as percentage of (A) Plastic limit minus the natural water content, to its plasticity index (B) Natural water content minus its plastic limit ... to its plasticity index (D) Liquid limit minus the natural water content to the plasticity index

Last Answer : (B) Natural water content minus its plastic limit to its plasticity index

When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as (A) Negative (B) Zero (C) Non-plastic (NP) (D) 1

Description : When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as (A) Negative (B) Zero (C) Non-plastic (NP) (D) 1

Last Answer : (B) Zero

The consistency index of a soil is defined as the ratio of (A) Liquid limit plus the natural water content to the plasticity index of the soil (B) Liquid limit minus the natural water content to the plasticity index of the soil (C) Natural water content of a soil minus plastic limit to the plasticity index of the soil (D) Natural water content of a soil plus its plastic limit to the plasticity index of the soil

Description : The consistency index of a soil is defined as the ratio of (A) Liquid limit plus the natural water content to the plasticity index of the soil (B) Liquid limit minus the natural water content to ... (D) Natural water content of a soil plus its plastic limit to the plasticity index of the soil

Last Answer : Answer: Option B

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Description : Plasticity index is defined as the range of water content between (A) Liquid and plastic limit (B) Plastic limit and semi solid limit (C) Semi-solid limit and liquid limit (D) Liquid limit and solid limit

Last Answer : Answer: Option A

Pick up the correct statement from the following: (A) The range of water content between the liquid limit and plastic limit is called plasticity index (B) The ratio of the liquid limit minus the natural water content to the plasticity index of soils, is called consistency index (C) The ratio of natural water content minus its plastic limit to its plasticity index is called liquidity index (D) All the above

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Last Answer : Answer: Option D

Plasticity index represents the range of water content between a) Liquid and plastic limit * b) Plastic limit and semi solid limit c) Semisolid Limit and liquid limit d) Liquid limit and solid limit.

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Last Answer : a) Liquid and plastic limit *

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Description : Define Liquid limit.

Last Answer : Liquid limit (WL): It is minimum water content at which two separated grooved soil parts mixed together under 25 blows of casagrande’s liquid limit apparatus; is called as liquid limit.

Explain the determination of plastic limit of soil.

Description : Explain the determination of plastic limit of soil.

Last Answer : Procedure for determination of plastic limit of soil: 1. Take 20-25 gm air dried soil sample passing through 425 micron IS sieve. 2. Add distilled water in soil and mix it thoroughly for 10-15 ... all above steps two more tones to get average water content as plastic limit (WP) given soil sample.

Write the laboratory procedure to determine liquid limit by Casagrande’s method with neat sketch.

Description : Write the laboratory procedure to determine liquid limit by Casagrande’s method with neat sketch.

Last Answer : Procedure of liquid limit 1. Take about 120 gm of air dried soil sample passing through 425 micron IS Sieve in metal tray. 2. Add 20% distilled water to form uniform soil paste. 3. Put this soil paste in the ... graph as liquid limit (wL) of given soil sample.  (ii) Grooving Toos  

Explain the determination of liquid limit of soil with neat sketches.

Description : Explain the determination of liquid limit of soil with neat sketches.

Last Answer : Procedure of Liquid Limit Test: 1. Take about 120 gm. of air dried soil sample passing through 425 micron IS sieve in metal tray. Add 20 % distilled water to the soil sample to form uniform soil ... content corresponding to 25 blows from graph as liquid limit (WL) of given soil sample.  

State the types of consistency limit and define any one

Description : State the types of consistency limit and define any one

Last Answer : Types of consistency limit 1.Liquid limit 2.Plastic limit 3.Shrinkage limit Liquid limit- It is minimum water content at which two separated grooved soil parts mixed together under 25 blows of ... in volume of soil due to further decrease in water content : is termed as shrinkage limit.

The admixture of coarser particles like sand or silt to clay causes (A) Decrease in liquid limit and increase in plasticity index (B) Decrease in liquid limit and no change in plasticity index (C) Decrease in both liquid limit and plasticity index (D) Increase in both liquid limit and plasticity index

Description : The admixture of coarser particles like sand or silt to clay causes (A) Decrease in liquid limit and increase in plasticity index (B) Decrease in liquid limit and no change in plasticity index ... in both liquid limit and plasticity index (D) Increase in both liquid limit and plasticity index

Last Answer : Answer: Option C

The group index for a soil, whose liquid limit is 40 percent, plasticity index is 10 percent and percentage passing 75 micron IS sieve (A) 0 (B) 3 (C) 5 (D) 7

Description : The group index for a soil, whose liquid limit is 40 percent, plasticity index is 10 percent and percentage passing 75 micron IS sieve (A) 0 (B) 3 (C) 5 (D) 7

Last Answer : Answer: Option A

In soils having same values of plasticity index, if liquid limit is increased, then(A) Compressibility and permeability decrease and dry strength increases (B) Compressibility, permeability and dry strength decrease (C) Compressibility, permeability and dry strength increase (D) Compressibility and permeability increase and dry strength decreases

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Last Answer : Answer: Option D

The consistency index of soil is a) (Natural water content - liquid limit) / plasticity index b) (Natural water content - liquid limit )/ liquidity index c) (Liquid limit - natural water content)/ consistency index d) (Liquid limit - natural water content)/plasticity index*

Description : The consistency index of soil is a) (Natural water content - liquid limit) / plasticity index b) (Natural water content - liquid limit )/ liquidity index c) (Liquid limit - natural water content)/ consistency index d) (Liquid limit - natural water content)/plasticity index*

Last Answer : d) (Liquid limit - natural water content)/plasticity index*

The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass, is known (A) Liquid limit (B) Plastic limit (C) Shrinkage limit (D) Permeability limit

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Last Answer : (C) Shrinkage limit

The minimum water content at which the soil retains its liquid state and also possesses a small shearing strength against flowing, is known (A) Liquid limit (B) Plastic limit (C) Shrinkage limit (D) Permeability limit

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Last Answer : (A) Liquid limit

The minimum water content at which the soil just begins to crumble when rolled into threads 3 mm in diameter, is known (A) Liquid limit (B) Plastic limit (C) Shrinkage limit (D) Permeability limit

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Last Answer : (B) Plastic limit

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Last Answer : Answer: Option A

The minimum water content at which a reduction in water content will not cause a decrease in the volume of a soil mass is known as a) Plastic limit b) Shrinkage limit* c) Liquid limit d) Consistency limit

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Last Answer : b) Shrinkage limit*

The property of soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change is known as a) Porosity b) Plasticity* c) Stiffness d) Plastic limit

Description : The property of soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change is known as a) Porosity b) Plasticity* c) Stiffness d) Plastic limit

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Last Answer : Answer: Option A

A soil sample has passing 0.075 mm sieve = 60% liquid limit = 65% and plastic limit = 40%. The group index of the soil, is (A) 5 (B) 20 (C) 40(D) None of these

Description : A soil sample has passing 0.075 mm sieve = 60% liquid limit = 65% and plastic limit = 40%. The group index of the soil, is (A) 5 (B) 20 (C) 40 (D) None of these

Last Answer : (D) None of these

If the natural moisture content, the liquid limit and plastic limit of a soil sample are stated as 30.5%, 42.5% and 22.5% respectively, the ratio of liquidity index and plastic index, is (A) (B) ½ (C) 2 (D) 2½

Description : If the natural moisture content, the liquid limit and plastic limit of a soil sample are stated as 30.5%, 42.5% and 22.5% respectively, the ratio of liquidity index and plastic index, is (A) (B) ½ (C) 2 (D) 2½

Last Answer : Answer: Option C

The compression index of a soil (A) Decreases with an increase in the liquid limit (B) Increases with an increase in the liquid limit (C) Decreases with an increase in the plastic limit (D) Is not related with plastic limit

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Last Answer : Answer: Option B

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Define outcrop and fold of rock.

Description : Define outcrop and fold of rock. 

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Define: 1) Degree of saturation and 2) Air content.

Description : Define: 1) Degree of saturation and 2) Air content.

Last Answer : i) Degree of saturation: The degree saturation is a ratio of the volume of water in the voids to the volume of voids. It is expressed as per cent ii) Air When soil mass is completely dry the ... = Vv Air content is defined as ratio of volume of air to volume of voids, i.e ac =Va/Vv

Define outcrop and strike

Description : Define outcrop and strike

Last Answer : i) Out crop: The dip and strike of beds can be easily measured in the field from their exposures called outcrops ii) Strike: The horizontal distance perpendicular to the fault plane is called as strike.

Define compaction and state purpose of compaction.

Description : Define compaction and state purpose of compaction.

Last Answer : Define Compaction : Instant compression of soil under dynamic load is called compaction Purpose of compaction : 1. To increase density and thereby shear strength and bearing capacity of soil, this is ... of earth dam. 5.To increase resistance towards erossion of soil by rain and other causes.

Define ultimate bearing capacity and safe bearing capacity.

Description : Define ultimate bearing capacity and safe bearing capacity.

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Define shear strength of soil and state field situations of shear failure.

Description : Define shear strength of soil and state field situations of shear failure. 

Last Answer : Shear Strength of Soil: Shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. . Field situations where shear failure occurs 1) ... wall, especially surcharge 3)Under foundation along planes of maximum shear 4) Sub grades of road.

Define Flow Net and state its characteristic

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Define void ratio; porosity; water content and degree of saturation.

Description : Define void ratio; porosity; water content and degree of saturation.

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Define folds and draw neat sketch of a fold and label its different parts.

Description : Define folds and draw neat sketch of a fold and label its different parts. 

Last Answer : Fold: Folds may be defined as undulations or bends that are developed in the rock of the Earth’s crust, as a result of stresses (commonly lateral compression) To which these rocks have been subjected to, from time to time in the past history of the Earth.

Define minerals and state any six properties of minerals.

Description : Define minerals and state any six properties of minerals.

Last Answer : Minerals have distinguishing physical properties that in most cases can be use to determine the identity of the mineral. Among the various properties crystal, habit, cleavage, hardness, density, luster, ... of water) Colour: color is sometimes an extremely diagnostic property of mineral

Define earthquake and intensity.

Description : Define earthquake and intensity.

Last Answer : i. Earthquake: It is define as vibrations induced in the earth's crust due to internal or external causes that virtually shake up a part of the crust and all the structures and living and ... of the actual shaking at the location during an earthquake and is assigned as Roman Capital Numerical.

Define joints and state their classification.

Description : Define joints and state their classification.

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Define outcrop and faults.

Description : Define outcrop and faults.

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Define geology and state its branches.

Description : Define geology and state its branches.

Last Answer : Geology: Geology is the science of study of the solid matter that constitutes the Earth. Encompassing such things as rocks, soil, gemstones, geology studies, the composition, structure, physical properties ... geology ix. Applied geology x. Hydrology xi. Indian geology xii. photo-geology

Define permeability and coefficient of permeability

Description : Define permeability and coefficient of permeability 

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Define fault and state its classification

Description : Define fault and state its classification

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Define petrology and rock

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Define outcrop, Dip , Strike and fold of Rocks.

Description : Define outcrop, Dip , Strike and fold of Rocks.

Last Answer : 1.Outcrop -The exposure of solid rock on the earth surface is known as outcrop.  2.Dip - It is the inclination of bedding plane of rock with horizontal is called as Dip.  3.Strike - ... the bends or curvatures in rock formed due to action of compressive forces on horizontal layers called as fold.