Geotechnical Engineering Mock Test 8

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Question 1 of 10

1. The term coefficient of consolidation C_v used in equation is adopted to indicate the effect of permeability only.

False

True

Question 1 of 10

Question 2 of 10

2. A soil that is not fully consolidated is called ___________

pre-consolidated

normally consolidated

over- consolidated

under-consolidated

Question 2 of 10

Question 3 of 10

3. The final settlement in terms of voids ratio is given by ____________

\(ρ_f=\frac{e_o-e}{1+e_o}H\)

\(ρ_f=\frac{e_o-e}{1+e_o}\)

\(ρ_f=\frac{e}{1+e_o}H\)

\(ρ_f=\frac{e_o-e}{e_o}H\)

Question 3 of 10

Question 4 of 10

4. In practical cases, the final consolidation settlement is calculated by the equation ___________

\(ρ_f=∫_0^H m_v Hdz\)

\(ρ_f=∫_0^Hm_v ∆σ' dz\)

\(ρ_f=∫_0^HH∆σ'dz\)

\(ρ_f=∫_0^Hm_v H∆σ' dz\)

Question 4 of 10

Question 5 of 10

5. The expansion index is also known as ___________

compression index

compressibility index

consolidation index

swelling index

Question 5 of 10

Question 6 of 10

6. The consolidation test is also known as ____________

flexure test

impact test

standard proctor test

Standard Oedometer test

Question 6 of 10

Question 7 of 10

7. Slow vertical deformation occurs when a compressive load is applied to a laterally confined layer of sand.

False

True

Question 7 of 10

Question 8 of 10

8. If v is velocity at the entry of the soil element of size dx, dz and width dy as shown in the figure. The quantity of water leaving the element is ___________

vdxdy

\((v + \frac{∂v}{∂z}dz)dxdy\)

\((v + \frac{∂v}{∂z}dz)dxdz\)

Question 8 of 10

Question 9 of 10

9. In the spring analogy of consolidation, cylinder is filled with water up to bottom of piston and spring carries 10 units of load. If external two units of load is applied and the valve is opened, then the effective pressure σ’ and hydrodynamic pressure u is given by ___________

σ’=0, u=12

σ’=10+∆σ’, u=2-∆σ’

σ’=10, u=2

σ’=12, u=0

Question 9 of 10

Question 10 of 10

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

\(ρ_f=H \frac{1}{1+e_o} log_{10} \frac{σ'}{σ'_0}\)

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

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

\(ρ_f=Hlog_{10} \frac{σ'}{σ'_0}\)

Question 10 of 10