# Soil mechanics and foundation engineering pdf

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In this blog, you will get all the previous year question papers for Diploma in Mechanical engineering, Civil Engineering, Electrical Engineering, Electronics, Computer, and Chemical Engineering subjects, ranging from to the present date.

## [PDF] Soil Mechanics And Foundation Engineering By Dr K.R. Arora Book Free Download

Residual soils are formed by a glaciers b wind c water d none of the above Ans:d. Which of the following types of soil is transported by gravitational forces?

A fully saturated soil is said to be a one phase system b two phase system with soil and air c two phase system with soil and water d three phase system Ans:c. Constant head permeameter is used to test permeability of a silt b clay c coarse sand d fine sand Ans:c. The dry density of soil is a If the voids of a soil mass are full of air only, the soil is termed as a air entrained soil b partially saturated soil c dry soil d dehydrated soil Ans:c. Select the correct statement. Voids ratio of a soil mass can a never be greater than unity b be zero c take any value greater than zero d take values between 0 and 1 only Ans:c.

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 a 1. When the degree of saturation is zero, the soil mass under consideration represents a one phase system b two phase system with soil and air c two phase system with soil and water d three phase system Ans:b.

The ratio of volume of voids to the total volume of soil mass is called a air content b porosity c percentage air voids d voids ratio Ans:b. Relative density of a compacted dense sand is approximately equal to a 0.

If the sand in-situ is in its densest state, then the relative density of sand is a zero b 1 c between 0 and 1 d greater than 1 Ans:b. Which of the following methods is most accurate for the determination of the water content of soil? For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass? A pycnometer is used to determine a water content and voids ratio b specific gravity and dry density c water content and specific gravity d voids ratio and dry density Ans:c.

In hydrometer analysis for a soil mass a both meniscus correction and dispersing agent correction are additive b both meniscus correction and dispersing agent correction are subtractive c meniscus correction is additive and dispersing agent correction is subtractive d meniscus correction is subtractive and dispersing agent correction is additive Ans:c.

The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in a the principle of test b the method of taking observations c the method of preparation of soil suspension d all of the above Ans:b. Which of the following is a measure of particle size range? Which of the following statements is correct? Uniformity coefficient of a soil is a always less than 1 b always equal to 1 c equal to or less than 1 d equal to or gi eater than 1 Ans:d.

If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in a liquid state b plastic state c semi-solid state d solid state Ans:b. 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 Ans:b. Toughness index is defined as the ratio of a plasticity index to consistency index b plasticity index to flow index c liquidity index to flow index d consistency index to liquidity index Ans:b.

If the plasticity index of a soil mass is zero, the soil is a sand b silt c clay d clayey silt Ans:a. 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 Ans:c.

The water content of soil, which represents the boundary between plastic state and liquid state, is known as a liquid limit b plastic limit c shrinkage limit d plasticity index Ans:a.

Which of the following soils has more plasticity index? At liquid limit, all soils possess a same shear strength of small magnitude b same shear strength of large magnitude c different shear strengths of small magnitude d different shear strengths of large magnitude Ans:a. 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 a the liquid limit of soil always increases b the liquid limit of soil always decreases c the liquid limit of soil may increase d the liquid limit of soil may decrease Ans:a.

According to IS classification, the range of silt size particles is a 4. Highway Research Board HRB classification of soils is based on a particle size composition b plasticity characteristics c both particle size composition and plasticity characteristics d none of the above Ans:c.

Sand particles are made of a rock minerals b kaolinite c illite d montmorillonite Ans:a. The clay mineral with the largest swelling and shrinkage characteristics is a kaolinite b illite c montmorillonite d none of the above Ans:c.

Dispersed type of soil structure is an arrangement comprising particles having a face to face or parallel orientation b edge to edge orientation c edge to face orientation d all of the above Ans:a. Effective stress is a the stress at particles contact b a physical parameter that can be measured c important because it is a function of engineering properties of soil d all of the above Ans:c.

Rise of water table above the ground surface causes a equal increase in pore water pressure and total stress b equal decrease in pore water pressure and total stress c increase in pore water pressure but decrease in total stress d decrease in pore water pressure but increase in total stress Ans:a. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively a zero and zero b 0.

If the water table rises upto ground surface, then the a effective stress is reduced due to decrease in total stress only but pore water pressure does not change b effective stress is reduced due to increase in pore water pressure only but total stress does not change c total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change d total stress is increased due to de-crease in pore water pressure but effective stress does not change Ans:b.

Quick sand is a a type of sand b flow condition occurring in cohesive soils c flow condition occurring in cohesionless soils d flow condition occurring in both cohesive and cohesionless soils Ans:a. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.

Physical properties of a permeant which influence permeability are a viscosity only b unit weight only c both viscosity and unit weight d none of the above Ans:c. Effective stress on soil a increases voids ratio and decreases permeability b increases both voids ratio and permeability c decreases both voids ratio and permeability d decreases voids ratio and increases permeability Ans:c. If the permeability of a soil is 0.

Which of the following methods is more suitable for the determination of permeability of clayey soil? Which of the following methods is best suited for determination of permeability of coarse-grained soils? Coefficient of permeability of soil a does not depend upon temperature b increases with the increase in temperature c increases with the decrease in temperature d none of the above Ans:b.

The average coefficient of permeability of natural deposits a parallel to stratification is always greater than that perpendicular to stratification b parallel to stratification is always less than that perpendicular to stratification c is always same in both directions d parallel to stratification may or may not be greater than that perpendicular to stratification Ans:a.

The total discharge from two wells situated near to each other is a sum of the discharges from individual wells b less than the sum of the discharges from individual wells c greater than the sum of the discharges from individual wells d equal to larger of the two discharges from individual wells Ans:b. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.

The discharge per meter length of dam is a 0. The most suitable method for drainage of fine grained cohesive soils is a well ppint system b vacuum method c deep well system d electroosmosis method Ans:d. Total number of stress components at a point within a soil mass loaded at its boundary is a 3 b 6 c 9 d 16 Ans:c.

The slope of isochrone at any point at a given time indicates the rate of change of a effective stress with time b effective stress with depth c pore water pressure with depth d pore water pressure with time Ans:c. Within the consolidation process of a saturated clay a a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant b a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant c both neutral pressure and effective pressure decrease d both neutral pressure and effective pressure increase Ans:b.

Which one of the following clays behaves like a dense sand? Coefficient of consolidation of a soil is affected by a compressibility b permeability c both compressibility and permeability d none of the above Ans:c. Degree of consolidation is a directly proportional to time and inversely proportional to drainage path b directly proportional to time and inversely proportional to square of drainage path c directly proportional to drainage path and inversely proportional to time d directly proportional to square of drainage path and inversely proportional to time Ans:b.

Time factor for a clay layer is a a dimensional parameter b directly proportional to permeability of soil c inversely proportional to drainage path d independent of thickness of clay layer Ans:b. Coefficient of consolidation for clays normally a decreases with increase in liquid limit b increases with increase in liquid limit c first increases and then decreases with increase in liquid limit d remains constant at all liquid limits Ans:a.

Direct measurement of permeability of the specimen at any stage of loading can be made a only in fixed ring type consolido-meter b only in floating ring type consolido-meter c both a and b d none of the above Ans:a. Compressibility of sandy soils is a almost equal to that of clayey soils b much greater than that of clayey soils c much less than that of clayey soils d none of the above Ans:c.

Coefficient of compressibility is a constant for any type of soil b different for different types of soils and also different for a soil under different states of consolidation c different for different types of soils but same for a soil under different states of consolidation d independent of type of soil but depends on the stress history of soil Ans:b.

The ultimate consolidation settlement of a structure resting on a soil a decreases with the increase in the initial voids ratio b decreases with the decrease in the plastic limit c increases with the increase in the initial voids ratio d increases with the decrease in the porosity of the soil Ans:a. The ultimate consolidation settlement of a soil is a directly proportional to the voids ratio b directly proportional to the compression index c inversely proportional to the compression index d none of the above Ans:b.

With the increase in the amount of compaction energy a optimum water content increases but maximum dry density decreases b optimum water content decreases but maximum dry density increases c both optimum water content and maximum dry density increase d both optimum water content and maximum dry density decrease[ES 93] Ans:b. The maximum dry density upto which any soil can be compacted depends upon a moisture content only b amount of compaction energy only c both moisture content and amount of compaction energy d none of the above Ans:c.

Select the incorrect statement. For a loose sand sample and a dense sand sample consolidated to the same effective stress a ultimate strength is same and also peak strength is same b ultimate strength is different but peak strength is same c ultimate strength is same but peak strength of dense sand is greater than that of loose sand d ultimate strength is same but peak Ans:c. The shear strength of a soil a is directly proportional to the angle of internal friction of the soil b is inversely proportional to the angle of internal friction of the soil c decreases with increase in normal stress d decreases with decrease in normal stress Ans:d.

In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear a decreases b increases c remains unchanged d first increases and then decreases Ans:a. Shear strength of a soil is a unique function of a effective stress only b total stress only c both effective stress and total stress d none of the above Ans:a. In a deposit of normally consolidated clay a effective stress increases with depth but water content of soil and un-drained strength decrease with depth b effective stress and water content increase with depth but undrained strength decreases with depth c effective stress and undrained strength increase with depth but water content decreases with depth d effective stress, water content and undrained strength decrease with depth Ans:c.

Unconfmed compressive strength test is a undrained test b drained test c consolidated undrained test d consolidated drained test Ans:a. The values of cohesion and angle of internal friction for the soil are respectively a 0. In the triaxial compression test, the application of additional axial stress i. In a triaxial compression test when drainage is allowed during the first stage i.

During the first stage of triaxial test when the cell pressure is increased from 0. Sensitivity of a soil can be defined as a percentage of volume change of soil under saturated condition b ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state c ratio of volume of voids to volume of solids d none of the above Ans:b.

The effect of cohesion on a soil is to a reduce both the active earth pressure intensity and passive earth pressure intensity b increase both the active earth pressure intensity and passive earth pressure intensity c reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity d increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity [GATE 99] Ans:c. Coefficient of earth pressure at rest is a less than active earth pressure but greater than passive earth pressure b greater than active earth pressure but less than passive earth pressure c greater than both the active earth pressure and passive earth pressure d less than both the active and passive earth pressures Ans:b.

Allowable bearing pressure for a foundation depends upon a allowable settlement only b ultimate bearing capacity of soil only c both allowable settlement and ultimate bearing capacity d none of above Ans:c. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing a cohesion and effective angle of shearing resistance b cohesion and effective unit weight of soil c effective unit weight of soil and effective angle of shearing resistance d effective angle of shearing resistance Ans:b.

In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be a less than mm b between mm and mm c between mm and 1 m d greater than 1 m Ans:b. A mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.

The settlement of a prototype shallow footing 1 m square under the same intensity of loading is a 15 mm b between 15 mm and 25 mm c 25 mm d greater than 25 mm Ans:b. A mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is a 15 mm b 30 mm c 50 mm d mm Ans:c. Contact pressure beneath a rigid footing resting on cohesive soil is a less at edges compared to middle b more at edges compared to middle c uniform throughout d none of the above Ans:b.

Your email address will not be published. Residual soils are formed by a glaciers b wind c water d none of the above Ans:d 2. A fully saturated soil is said to be a one phase system b two phase system with soil and air c two phase system with soil and water d three phase system Ans:c 5. Constant head permeameter is used to test permeability of a silt b clay c coarse sand d fine sand Ans:c 7.

If the voids of a soil mass are full of air only, the soil is termed as a air entrained soil b partially saturated soil c dry soil d dehydrated soil Ans:c 9. Ans:d Voids ratio of a soil mass can a never be greater than unity b be zero c take any value greater than zero d take values between 0 and 1 only Ans:c When the degree of saturation is zero, the soil mass under consideration represents a one phase system b two phase system with soil and air c two phase system with soil and water d three phase system Ans:b The ratio of volume of voids to the total volume of soil mass is called a air content b porosity c percentage air voids d voids ratio Ans:b

## Pdf Soil Mechanics and Foundation Engineering by Dr. KR Arora

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Soil Mechanics and Foundation Engineering by Dr. KR Arora is a book where the author elaborates and describes the fundamentals of soil mechanics and soil engineering. Soil Mechanics and Foundation Engineering Geotechnical Engineering fast-developing discipline of civil engineering. Considerable work has been done in the field in the last 6 decades. A student finds it difficult to have access to the latest literature in the filled. In this book, there is very effective content collected from various sources. The book is divided into two parts.

## Geotechnical Engineering

Arora, B. E Civil , M. E Hons Ph.

Our planet Earth has an average radius of km and a mean mass density of 5. The mantle consists of two parts, upper mantle and lower mantle. The upper mantle is solid rock while the lower mantle is molten rock. Above the upper mantle is the crust, which may be as much as 50 km thick in the continental areas and as little as 7 km thick in oceanic areas.

Residual soils are formed by a glaciers b wind c water d none of the above Ans:d. Which of the following types of soil is transported by gravitational forces? A fully saturated soil is said to be a one phase system b two phase system with soil and air c two phase system with soil and water d three phase system Ans:c.

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• Arora – Soil Mechanics and Foundation Engineering written by Dr.K.R. Arora, B.E (Civil), M.E (Hons) Ph.D (IITD), F.I.E, M.I.G.S, FISDT, MIWRS, Former Professor. Henriette R. - 02.04.2021 at 06:31
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