Download PDF
Free download in PDF Soil Mechanics and Foundation Engineering Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
61
Time factor for a clay layer is
[A]
a dimensional parameter
[B]
directly proportional to permeability of soil
[C]
inversely proportional to drainage path
[D]
independent of thickness of clay layer
Answer: directly proportional to permeability of soil
62
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
Answer: directly proportional to time and inversely proportional to square of drainage path
63
Coefficient of consolidation of a soil is affected by
[A]
compressibility
[B]
permeability
[C]
both compressibility and permeability
[D]
none of the above
Answer: both compressibility and permeability
64
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
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
[A]
0.028
[B]
0.28
[C]
0.36
[D]
0.036
66
Within the consolidation process of a saturated clay
[A]
a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
[B]
a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
[C]
both neutral pressure and effective pressure decrease
[D]
both neutral pressure and effective pressure increase
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
[A]
effective stress with time
[B]
effective stress with depth
[C]
pore water pressure with depth
[D]
pore water pressure with time
Answer: pore water pressure with depth
68
Total number of stress components at a point within a soil mass loaded at its boundary is
69
The most suitable method for drainage of fine grained cohesive soils is
[A]
well ppint system
[B]
vacuum method
[C]
deep well system
[D]
electroosmosis method
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
[A]
0.00018 nrVsec
[B]
0.0045 m3/sec
[C]
0.18m3/sec
[D]
0.1125m3/sec
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
[A]
3 months
[B]
6 months
[C]
12 months
[D]
24 months
72
Coefficient of consolidation for clays normally
[A]
decreases 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
Answer: decreases with increase in liquid limit
73
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
Answer: much less than that of clayey soils
74
Select the correct statement.
[A]
coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
[B]
coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
[C]
coefficient of compressibility is cons-tant for any clay
[D]
none of the above
Answer: coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
75
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
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
[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
Answer: decreases with the increase in the initial voids ratio
77
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
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
[A]
10 mm
[B]
20 mm
[C]
40 mm
[D]
none of the above
79
Coarse grained soils are best compacted by a
[A]
drum roller
[B]
rubber tyred roller
[C]
sheep’s foot roller
[D]
vibratory roller
80
With the increase in the amount of compaction energy
[A]
optimum water content increases but maximum dry density decreases
[B]
optimum water content decreases but maximum dry density increases
[C]
both optimum water content and maximum dry density increase
[D]
both optimum water content and maximum dry density decrease
Answer: optimum water content decreases but maximum dry density increases
Please share this page