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Browse complete papersIn a sandy soil with a shallow foundation, which of the following methods is used to improve bearing capacity?
Increasing the depth of the foundation
Adding more sand to the soil
Using a heavier foundation material
Installing piles to transfer the load to deeper soil layers
Correct answer
Increasing the depth of the foundation
For a given soil, if the void ratio increases, what happens to the porosity?
It increases
It decreases
It remains the same
It becomes zero
Correct answer
It increases
A soil sample has a void ratio of \(0.6\). What is its porosity?
1
\(0.6\)
\(0.37\)
\(0.75\)
Correct answer
1
In a soil specimen, \(80%\) of particles pass through a \(4.75 \text{ mm}\) sieve, and \(30%\) of particles pass through a \(75\text{-micron} \) sieve. The uniformity coefficient is \(12\), and the coefficient of curvature is \(2\). As per IS classification, this soil is classified as:
SW
MH
OH
SC
Correct answer
SW
Which of the following is NOT a direct consequence of soil compaction?
Increase in soil strength.
Decrease in air voids in the soil.
Increase in water retention.
Decrease in soil’s ability to compact further.
Correct answer
Increase in soil strength.
A wet soil sample weighs 210 g and after oven drying weighs 180 g. Find its moisture content (%).
20%
Correct answer
A soil has volume of solids \(0.35 m^3\) and volume of voids \(0.15 m^3\). Find its porosity (%).
30%
35%
40%
Correct answer
A soil has specific gravity (6s) = 2.65 and void ratio (e) = 0.6 Find its dry unit weight (kN/m³), Yw = 9.81kN / (m ^ 3)
15.3
16.25
17.23
18.1
Correct answer
15.3
During field compaction, a clayey embankment shows MDD lower than lab Proctor value despite same compact ive effort. Which is the most likely reason?
Variation in soil mineralogy
Inadequate moisture control
Higher compactive energy in field
Reduction in air voids
Correct answer
Variation in soil mineralogy
In a standard Proctor test, MDD = \(1.85 \text{ g/cc}\), OMC = \(12%\). In the field, dry density achieved = \(1.73 \text{ g/cc}\). Degree of compaction (\(%\)) is:
\(91.3%\)
\(93.5%\)
\(95%\)
\(96.5%\)
Correct answer
\(91.3%\)