Q1.Group I lists the type of gain or loss of strength in soils. Group II lists the property or process
responsible for the loss or gain of strength in soils.
Group I Group II
P. Regain of strength with time 1. Boiling
Q. Loss of strength due to cyclic loading 2. Liquefaction
R. Loss of strength due to upward seepage 3. Thixotropy
S. Loss of strength due to remolding 4. Sensitivity
The correct match between Group I and Group II is
Answer : Option CExplaination / Solution: No Explaination.
Q3.The laboratory test on a soil sample yields the following results: natural moisture content =
18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%.
The liquidity index and activity (as per the expression proposed by skempton ) of the soil,
respectively, are
Q4.The old concert hall was demolished because of fears that the foundation would be affected by
the construction tried to mitigate the impact of pressurized air pockets created by the excavation
of large amounts of soil. But even with these safeguards, it was feared that the soil below the
concert hall would not be stable.
From this, one can infer that
Answer : Option BExplaination / Solution: No Explaination.
Q8.A fine grained soil is found to be plastic in the water content range of 26-48%. As per
Indian Standard Classification System, the soil is classified as
Answer : Option DExplaination / Solution:
Soil is plastic in range of 26% to 48%. So, plastic limit =26%, liquid limit = 48%
Since 35%
Q9.A vertical cut is to be made in a soil mass having cohesion c, angle of internal friction
ϕ, and unit weight γ. Considering Ka and Kp as the coefficients of active and passive earth pressures, respectively, the maximum depth of unsupported excavation
is