CE8491 Important 16 Marks Questions SOIL MECHANICS
CE8491 Important 16 Marks Questions Soil Mechanics Regulation 2017 Anna University free download. Soil Mechanics Important 16 Marks Questions CE8491 pdf free download.
Sample CE8491 Important 16 Marks Questions Soil Mechanics:
1. Write down a neat procedure for determining water content and specific gravity of a given soil in the laboratory by using a pycnometer.
2. Sandysoilinaborrowpithasunitweightofsolidsas25.8kN/m3, watercontentequalto11%
andbulkunitweightequalto16.4kN/m3.How manycubicmeterofcompacted fillcouldbe (CE8491 Important 16 Marks Questions Soil Mechanics)
constructedof3500m3 ofsandexcavatedfromborrowpit,ifrequiredvalueofporosityinthe
compactedfill is30%. Also calculatethechange in degreeofsaturation.
3. The following data on consistency limits are available for two soils A and B.
S.No. Index Soil A Soil B
1 Plastic limit 16% 19%
2 Liquid limit 30% 52%
3 Flowindex 11 06
4 Natural water content 32% 40%
Find which soil is
(i) More plastic (CE8491 Important 16 Marks Questions Soil Mechanics)
(ii) Better foundation material onremoulding.
(iii) Better shear strength as function of water content.
(iv) Better shear strength at plastic limit.
Classify the soil as per IS classification system. Do those soils have organic matter?
4. By three phase soil system, prove that the degree of saturation S (as ratio) in terms of mass unit
weight(γ),voidratio(e),specificgravityofsoilgrains(G)andunitweightofwater(γw) is given by the
expression: (CE8491 Important 16 Marks Questions Soil Mechanics)
5. Themassofwetsoilwhencompactedinamouldwas19.55kN.Thewatercontentofthesoil
was16%.Ifthevolumeofthemouldwas0.95m3.Determine(i)dryunitweight,(ii)Voidratio, (iii)degreeof (CE8491 Important 16 Marks Questions Soil Mechanics)
saturationand (iv)percent airvoids. TakeG = 2.68.
6. Ina hydrometer analysis, the corrected hydrometer reading in a 1000 ml uniform soil
suspension at the start of sedimentation was 28. After a lapse of 30 minutes, the corrected
hydrometer reading was 12 and the corresponding effective depth10.5cm.thespecificgravity of the
solids was 2.68. Assuming the viscosity and unit weight of water at the temperature of the
testas0.001Ns/m2 and9.81kN/m3respectively. Determine the weight of solids mixed in the (CE8491 Important 16 Marks Questions Soil Mechanics)
suspension, the effective diameter corresponding to the 30 minutes reading and the percentage of
particle finer than this size.
7. Anearthenembankmentof106m3volume is to be constructed with a soil having a void ratio
of0.80aftercompaction.TherearethreeborrowpitsmarkedA,BandChavingsoilswithvoidsratiosof0.90 (CE8491 Important 16 Marks Questions Soil Mechanics)
,0.50and1.80respectively.ThecostofexcavationandtransportingthesoilisRs 0.25, Rs 0.23 and Rs
0.18perm3 respectively. Calculate the volume of soil to be excavated from each pit. Which (CE8491 Important 16 Marks Questions Soil Mechanics)
borrow pit is the most economical? (Take G =2.65).
| Subject name | Soil Mechanics |
| Short Name | SM |
| Semester | 4 |
| Subject Code | CE8491 |
| Regulation | 2017 regulation |
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