Questions and answers for exam Preparation

MCQs

Total Questions : 219 | Page 1 of 22 pages

Question 1. The recompression index Cs is________ compared to compression index Cc for pre-consolidated soils.

small
very small
large
very large

Discuss Question

Answer: Option B. -> very small
Answer: (b).very small

Question 2. In case of pre-consolidated soil, the final settlement is ___________

small
negligible
large
very large

Discuss Question

Answer: Option A. -> small
Answer: (a).small

Question 3. When the pre-consolidation pressure σₚ‘ is greater than initial effective pressure σ’₀ but smaller than effective pressure σ’, then the final settlement is calculated on the basis of ___________

settlement due to σ’₀ to σₚ‘ using Cₛ only
settlement due to σₚ‘ to σ’ using Cc only
settlement due to σ’₀ to σₚ‘ using Cₛ and settlement due to σₚ‘ to σ’ using Cc
settlement due to σ’ to σₚ‘ using Cc and settlement due to σₚ‘ to σ’ using Cc

Discuss Question

Answer: Option C. -> settlement due to σ’₀ to σₚ‘ using Cₛ and settlement due to σₚ‘ to σ’ using Cc
Answer: (c).settlement due to σ’₀ to σₚ‘ using Cₛ and settlement due to σₚ‘ to σ’ using Cc

Question 4. When the effective pressure is smaller than pre-consolidation pressure, the final settlement is ____________

\(ρ_f=Hlog_{10} \frac{σ’}{σ’_0}\)
\(ρ_f=H \frac{C_c}{1+e_o} log_{10} \frac{σ’}{σ’_0}\)
\(ρ_f=H \frac{C_S}{1+e_o} log_{10} \frac{σ’}{σ’_0}\)
\(ρ_f=H \frac{1}{1+e_o} log_{10} \frac{σ’}{σ’_0}\)

Discuss Question

Answer: Option C. -> \(ρ_f=H \frac{C_S}{1+e_o} log_{10} \frac{σ’}{σ’_0}\)
Answer: (c).\(ρ_f=H \frac{C_S}{1+e_o} log_{10} \frac{σ’}{σ’_0}\)

Question 5. For a finite surface loading, the intensity of change in effective pressure decreases with depth of layer in linear manner.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 6. At time t, the hydraulic head corresponding to excess hydrostatic pressure is __________

\(h=\frac{σ’}{γ_w}\)
\(h=\frac{\overline{u}}{γ_w} \)
\(h=\frac{γ_w}{\overline{u}}\)
\(h=\frac{σ’\overline{u}}{γ_w} \)

Discuss Question

Answer: Option B. -> \(h=\frac{\overline{u}}{γ_w} \)
Answer: (b).\(h=\frac{\overline{u}}{γ_w} \)

Question 7. The hydraulic gradient i is given by _________

\(i=\frac{γ_w ∂h}{∂z}\)
\(i=\frac{∂h}{γ_w ∂z}\)
\(i=\frac{\overline{u}∂h}{∂z}\)
\(i=\frac{∂h}{∂z}\)

Discuss Question

Answer: Option D. -> \(i=\frac{∂h}{∂z}\)
Answer: (d).\(i=\frac{∂h}{∂z}\)

Question 8. The decrease in volume is given by the equation ___________

∆v=-V₀ ∆σ’
∆v=-aᵥ V₀ ∆σ’
∆v=-mᵥ ∆σ’
∆v=-mᵥ V₀ ∆σ’

Discuss Question

Answer: Option D. -> ∆v=-mᵥ V₀ ∆σ’
Answer: (d).∆v=-mᵥ V₀ ∆σ’

Question 9. Decrease in the volume of the soil is equal to _________

volume of water squeeze out
volume of water entering the soil element
volume of water leaving the soil element
volume of soil in wet state

Discuss Question

Answer: Option A. -> volume of water squeeze out
Answer: (a).volume of water squeeze out

Question 10. The rate of change of velocity along the depth of layer is ___________

\(\frac{∂v}{∂z}=\frac{1}{γ_w}\frac{∂^2 \overline{u}}{∂z^2} \)
\(\frac{∂v}{∂z}=\frac{k}{γ_w}\frac{\overline{u}}{∂z^2} \)
\(\frac{∂v}{∂z}=\frac{∂^2 \overline{u}}{∂z^2} \)
\(\frac{∂v}{∂z}=\frac{k}{γ_w} \frac{∂^2 \overline{u}}{∂z^2} \)

Discuss Question

Answer: Option D. -> \(\frac{∂v}{∂z}=\frac{k}{γ_w} \frac{∂^2 \overline{u}}{∂z^2} \)
Answer: (d).\(\frac{∂v}{∂z}=\frac{k}{γ_w} \frac{∂^2 \overline{u}}{∂z^2} \)