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
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__________________?
(A) 10 mm
(B) 20 mm
(C) 40 mm
(D) none of the above
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
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
Coarse grained soils are best compacted by a_______________?
(A) drum roller
(B) rubber tyred roller
(C) sheep’s foot roller
(D) vibratory roller
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
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
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
(C) 12 months
(D) 24 months
Which one of the following clays behaves like a dense sand ?
(A) over-consolidated ciay with a high over-consolidation ratio
(B) over-consolidated clay with a low over-consolidation ratio
(C) normally consolidated clay
(D) under-consolidated clay
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