Questions and answers for exam Preparation

MCQs

Total Questions : 219 | Page 9 of 22 pages

Question 81. 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 equation _________

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

Discuss Question

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

Question 82. In determination of pre-consolidation pressure ___________ point of virgin curve is selected.

maximum curvature
maximum radius
minimum curvature
initial point

Discuss Question

Answer: Option A. -> maximum curvature
Answer: (a).maximum curvature

Question 83. To find pre-consolidation pressure __________ sample is used.

undisturbed clay
disturbed clay
gravel
sand gravel

Discuss Question

Answer: Option A. -> undisturbed clay
Answer: (a).undisturbed clay

Question 84. To find pre-consolidation pressure __________ relationship in graph is plotted.

voids ratio and effective pressure
effective pressure and total pressure
effective pressure and pore pressure
total pressure and total pressure

Discuss Question

Answer: Option A. -> voids ratio and effective pressure
Answer: (a).voids ratio and effective pressure

Question 85. The theoretical concept of consolidation process was developed by _____________

Terzaghi
Taylor
Skempton
Darcy

Discuss Question

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

Question 86. In determination of one-dimensional consolidation as shown in the figure, the line AB represents ___________

at initial time t₀, u̅=∆σ
at initial time t₀, u̅=0
at final time tf, u̅=∆σ
at final time tf, u̅=0

Discuss Question

Answer: Option D. -> at final time tf, u̅=0
Answer: (d).at final time tf, u̅=0

Question 87. 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 entering the element is ___________

v
vdxdy
vdzdy
vdzdx

Discuss Question

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

Question 88. If v is velocity at the entry of the soil element of size dx, dz and width dy as shown in the figure. The net quantity of water squeezed out of the element per unit time is ___________

∆q=v
∆q=vdxdy
\(∆q= \frac{∂v}{∂z}vdzdy\)
\(∆q=\frac{∂v}{∂z}dxdydz\)

Discuss Question

Answer: Option D. -> \(∆q=\frac{∂v}{∂z}dxdydz\)
Answer: (d).\(∆q=\frac{∂v}{∂z}dxdydz\)

Question 89. In the graph, point Rc represents ________

initial consolidation
corrected zero reading
secondary consolidation
initial zero reading

Discuss Question

Answer: Option B. -> corrected zero reading
Answer: (b).corrected zero reading

Question 90. 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 ___________