Civil Engineering MCQs

Page No. 243

Unconfmed compressive strength test is________________?


aundrained test

✓


b drained test

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c consolidated undrained test

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dconsolidated drained test

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View Answer undrained test

In a deposit of normally consolidated clay_________________?


aeffective stress increases with depth but water content of soil and un-drained strength decrease with depth

✖


beffective stress and water content increase with depth but undrained strength decreases with depth

✖


ceffective stress and undrained strength increase with depth but water content decreases with depth

✓


deffective stress, water content and undrained strength decrease with depth

✖



Skempton’s pore pressure coefficient B for saturated soil is________________?


a1

✓


b zero

✖


cbetween 0 and 1

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dgreater than 1

✖


View Answer 1

The shear strength of a soil_________________?


ais directly proportional to the angle of internal friction of the soil

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bis inversely proportional to the angle of internal friction of the soil

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c decreases with increase in normal stress

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ddecreases with decrease in normal stress

✓



For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?


a dry of OMC and wet of OMC

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b wet of OMC and dry of OMC

✓


c wet of OMC and wet of OMC

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ddry of OMC and dry of OMC where OMC is optimum moisture content

✖



For a loose sand sample and a dense sand sample consolidated to the same effective stress_____________?


aultimate strength is same and also peak strength is same

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bultimate strength is different but peak strength is same

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cultimate strength is different but peak strength is same

✓


d ultimate strength is same but peak

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With the increase in the amount of compaction energy________________?


aoptimum water content increases but maximum dry density decreases

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boptimum water content decreases but maximum dry density increases

✓


cboth optimum water content and maximum dry density increase

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dboth optimum water content and maximum dry density decrease

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Direct measurement of permeability of the specimen at any stage of loading can be made_______________?


aonly in fixed ring type consolido-meter

✓


bonly in floating ring type consolido-meter

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cboth (A) and (B)

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d none of the above

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The ultimate consolidation settlement of a structure resting on a soil_______________?


adecreases with the increase in the initial voids ratio

✓


bdecreases with the decrease in the plastic limit

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c increases with the increase in the initial voids ratio

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d increases with the decrease in the porosity of the soil

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A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is__________________?


a10 mm

✓


b20 mm

✖


c 40 mm

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d none of the above

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View Answer 10 mm

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