Soil Mechanics and Foundation Engineering Quiz | Soil Mechanics and Foundation Engineering Multiple Choice Questions with Answers
Questions
61
Time factor for a clay layer is
Answer: directly proportional to permeability of soil
62
Degree of consolidation is
Answer: directly proportional to time and inversely proportional to square of drainage path
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63
Coefficient of consolidation of a soil is affected by
Answer: both compressibility and permeability
64
Which one of the following clays behaves like a dense sand ?
Answer: over-consolidated ciay with a high over-consolidation ratio
65
The value of compression index for a remoulded sample whose liquid limit is 50% is
Answer: 0.28
66
Within the consolidation process of a saturated clay
Answer: a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
67
The slope of isochrone at any point at a given time indicates the rate of change of
Answer: pore water pressure with depth
68
Total number of stress components at a point within a soil mass loaded at its boundary is
Answer: 9
69
The most suitable method for drainage of fine grained cohesive soils is
Answer: electroosmosis method
70
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 0.03 mm/sec. The discharge per meter length of dam is
Answer: 0.00018 nrVsec
71
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
Answer: 3 months
72
Coefficient of consolidation for clays normally
Answer: decreases with increase in liquid limit
73
Compressibility of sandy soils is
Answer: much less than that of clayey soils
74
Select the correct statement.
Answer: coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
75
Coefficient of compressibility is
Answer: different for different types of soils and also different for a soil under different states of consolidation
76
The ultimate consolidation settlement of a structure resting on a soil
Answer: decreases with the increase in the initial voids ratio
77
The ultimate consolidation settlement of a soil is
Answer: directly proportional to the compression index
78
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
Answer: 10 mm
80
With the increase in the amount of compaction energy
Answer: optimum water content decreases but maximum dry density increases
