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Free download in PDF Soil Mechanics and Foundation 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
Coefficient of permeability of soil
[A]
does not depend upon temperature
[B]
increases with the increase in temperature
[C]
increases with the decrease in temperature
[D]
none of the above
Answer: increases with the increase in temperature
42
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 25%
[B]
increases by 50%
[C]
increases by 33.3%
[D]
decreases by 33.3%
43
Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
[A]
constant head method
[B]
falling head method
[C]
both the above
[D]
none of the above
Answer: constant head method
44
Which of the following methods is more suitable for the determination of permeability of clayey soil ?
[A]
constant head method
[B]
falling head method
[C]
horizontal permeability test
[D]
none of the above
Answer: falling head method
45
If the permeability of a soil is 0.8 mm/sec, the type of soil is
[A]
gravel
[B]
sand
[C]
silt
[D]
clay
46
Effective stress on soil
[A]
increases voids ratio and decreases permeability
[B]
increases both voids ratio and permeability
[C]
decreases both voids ratio and permeability
[D]
decreases voids ratio and increases permeability
Answer: decreases both voids ratio and permeability
47
Select the correct statement.
[A]
The greater the viscosity, the greater is permeability.
[B]
The greater the unit weight, the greater is permeability.
[C]
The greater the unit weight, the smaller is permeability.
[D]
Unit weight does not affect per-meability.
Answer: The greater the unit weight, the greater is permeability.
48
Physical properties of a permeant which influence permeability are
[A]
viscosity only
[B]
unit weight only
[C]
both viscosity and unit weight
[D]
none of the above
Answer: both viscosity and unit weight
49
The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to
[A]
1.0m
[B]
1.5 m
[C]
2.0 m
[D]
None of these
50
Quick sand is a
[A]
type of sand
[B]
flow condition occurring in cohesive soils
[C]
flow condition occurring in cohesionless soils
[D]
flow condition occurring in both cohesive and cohesionless soils
51
If the water table rises upto ground surface, then the
[A]
effective stress is reduced due to decrease in total stress only but pore water pressure does not change
[B]
effective stress is reduced due to increase in pore water pressure only but total stress does not change
[C]
total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change
[D]
total stress is increased due to de-crease in pore water pressure but effective stress does not change
Answer: effective stress is reduced due to increase in pore water pressure only but total stress does not change
52
The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively
[A]
zero and zero
[B]
0.5 kg/cm2 and zero
[C]
0.5 kg/cm2 and 0.5 kg/cm2
[D]
1.0 kg/cm2 and 0.5 kg/cm2
Answer: 0.5 kg/cm2 and zero
53
Rise of water table above the ground surface causes
[A]
equal increase in pore water pressure and total stress
[B]
equal decrease in pore water pressure and total stress
[C]
increase in pore water pressure but decrease in total stress
[D]
decrease in pore water pressure but increase in total stress
Answer: equal increase in pore water pressure and total stress
54
Effective stress is
[A]
the stress at particles contact
[B]
a physical parameter that can be measured
[C]
important because it is a function of engineering properties of soil
[D]
all of the above
Answer: important because it is a function of engineering properties of soil
55
Dispersed type of soil structure is an arrangement comprising particles having
[A]
face to face or parallel orientation
[B]
edge to edge orientation
[C]
edge to face orientation
[D]
all of the above
Answer: face to face or parallel orientation
56
The clay mineral with the largest swelling and shrinkage characteristics is
[A]
kaolinite
[B]
illite
[C]
montmorillonite
[D]
none of the above
57
Inorganic soils with low compressibility are represented by
[A]
MH
[B]
SL
[C]
ML
[D]
None of these
58
Highway Research Board (HRB) classification of soils is based on
[A]
particle size composition
[B]
plasticity characteristics
[C]
both particle size composition and plasticity characteristics
[D]
none of the above
Answer: both particle size composition and plasticity characteristics
59
The average coefficient of permeability of natural deposits
[A]
parallel to stratification is always greater than that perpendicular to stratification
[B]
parallel to stratification is always less than that perpendicular to stratification
[C]
is always same in both directions
[D]
parallel to stratification may or may not be greater than that perpendicular to stratification
Answer: parallel to stratification is always greater than that perpendicular to stratification
60
The total discharge from two wells situated near to each other is
[A]
sum of the discharges from individual wells
[B]
less than the sum of the discharges from individual wells
[C]
greater than the sum of the discharges from individual wells
[D]
equal to larger of the two discharges from individual wells
Answer: less than the sum of the discharges from individual wells
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