Civil Engineering MCQs

Page No. 244

The ultimate consolidation settlement of a soil is________________?


adirectly proportional to the voids ratio

✖


b directly proportional to the compression index

✓


c inversely proportional to the compression index

✖


dnone of the above

✖



The maximum dry density upto which any soil can be compacted depends upon____________?


amoisture content only

✖


b amount of compaction energy only

✖


cboth moisture content and amount of compaction energy

✓


dnone of the above

✖



Coarse grained soils are best compacted by a_______________?


adrum roller

✖


brubber tyred roller

✖


csheep’s foot roller

✖


dvibratory roller

✓


View Answer vibratory roller

Coefficient of compressibility is_______________?


aconstant for any type of soil

✖


bdifferent for different types of soils and also different for a soil under different states of consolidation

✓


cdifferent for different types of soils but same for a soil under different states of consolidation

✖


dindependent of type of soil but depends on the stress history of soil

✖



Compressibility of sandy soils is______________?


a almost equal to that of clayey soils

✖


bmuch greater than that of clayey soils

✖


cmuch less than that of clayey soils

✓


dnone of the above

✖



Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is_________________?


a 3 months

✓


b 6 months

✖


c12 months

✖


d24 months

✖


View Answer 3 months

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


a over-consolidated ciay with a high over-consolidation ratio

✓


bover-consolidated clay with a low over-consolidation ratio

✖


cnormally consolidated clay

✖


d under-consolidated clay

✖



Degree of consolidation is________________?


a directly proportional to time and inversely proportional to drainage path

✖


bdirectly 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

✖



Coefficient of consolidation for clays normally_______________?


adecreases 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

✖



Time factor for a clay layer is_______________?


aa dimensional parameter

✖


b directly proportional to permeability of soil

✓


c inversely proportional to drainage path

✖


d independent of thickness of clay layer

✖



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