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Free download in PDF Geotechnical Engineering Short Questions and 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.
41
Sand particles are made of
[A]
kaolinite
[B]
illite
[C]
montmorillonite
[D]
rock minerals
42
Effective stress is
[A]
important because it is a function of engineering properties of soil
[B]
the stress at particles contact
[C]
a physical parameter that can be measured
[D]
all of the above
Answer: important because it is a function of engineering properties of soil
43
The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively
[A]
0.5 kg/cm2 and zero
[B]
zero and zero
[C]
0.5 kg/cm2 and 0.5 kg/cm2
[D]
none of the above
Answer: 0.5 kg/cm2 and zero
44
Quick sand is a
[A]
flow condition occurring in cohesive soils
[B]
flow condition occurring in cohesionless soils
[C]
type of sand
[D]
flow condition occurring in both cohesive and cohesionless soils
45
Physical properties of a permeant which influence permeability are
[A]
unit weight only
[B]
viscosity only
[C]
both viscosity and unit weight
[D]
none of the above
Answer: both viscosity and unit weight
46
Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
[A]
falling head method
[B]
constant head method
[C]
both the above
[D]
none of the above
Answer: constant head method
47
Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.
If other things remain constant, the coefficient of permeability
[A]
increases by 50%
[B]
increases by 25%
[C]
decreases by 33.3%
[D]
none of the above
48
The total discharge from two wells situated near to each other is
[A]
less than the sum of the discharges from individual wells
[B]
sum of the discharges from individual wells
[C]
equal to larger of the two discharges from individual wells
[D]
greater than the sum of the discharges from individual wells
Answer: less than the sum of the discharges from individual wells
49
The most suitable method for drainage of fine grained cohesive soils is
[A]
electroosmosis method
[B]
well ppint system
[C]
vacuum method
[D]
None of the above
Answer: electroosmosis method
50
The slope of isochrone at any point at a given time indicates the rate of change of
[A]
pore water pressure with depth
[B]
effective stress with time
[C]
effective stress with depth
[D]
none of the above
Answer: pore water pressure with depth
51
Which one of the following clays behaves like a dense sand ?
[A]
over-consolidated clay with a low over-consolidation ratio
[B]
normally consolidated clay
[C]
under-consolidated clay
[D]
over-consolidated ciay with a high over-consolidation ratio
Answer: over-consolidated ciay with a high over-consolidation ratio
52
Coefficient of consolidation of a soil is affected by
[A]
permeability
[B]
compressibility
[C]
both compressibility and permeability
[D]
none of the above
Answer: both compressibility and permeability
53
Degree of consolidation is
[A]
directly proportional to time and inversely proportional to square of drainage path
[B]
directly proportional to time and inversely proportional to 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
54
Time factor for a clay layer is
[A]
directly proportional to permeability of soil
[B]
a dimensional parameter
[C]
inversely proportional to drainage path
[D]
independent of thickness of clay layer
Answer: directly proportional to permeability of soil
55
Coefficient of consolidation for clays normally
[A]
increases with increase in liquid limit
[B]
first increases and then decreases with increase in liquid limit
[C]
remains constant at all liquid limits
[D]
decreases with increase in liquid limit
Answer: decreases with increase in liquid limit
56
Compressibility of sandy soils is
[A]
much less than that of clayey soils
[B]
almost equal to that of clayey soils
[C]
much greater than that of clayey soils
[D]
none of the above
Answer: much less than that of clayey soils
57
The ultimate consolidation settlement of a structure resting on a soil
[A]
decreases with the decrease in the plastic limit
[B]
increases with the increase in the initial voids ratio
[C]
increases with the decrease in the porosity of the soil
[D]
decreases with the increase in the initial voids ratio
Answer: decreases with the increase in the initial voids ratio
58
The ultimate consolidation settlement of a soil is
[A]
directly proportional to the compression index
[B]
directly proportional to the voids ratio
[C]
inversely proportional to the compression index
[D]
None of the above
Answer: directly proportional to the compression index
59
Coarse grained soils are best compacted by a
[A]
vibratory roller
[B]
drum roller
[C]
rubber tyred roller
[D]
none of the above
60
With the increase in the amount of compaction energy
[A]
optimum water content decreases but maximum dry density increases
[B]
both optimum water content and maximum dry density increase
[C]
optimum water content increases but maximum dry density decreases
[D]
both optimum water content and maximum dry density decrease
Answer: optimum water content decreases but maximum dry density increases
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