Questions and answers for exam Preparation

MCQs

Total Questions : 189 | Page 16 of 19 pages

Question 151. The Boussinesq’s vertical pressure σz under a uniformly loaded circular area is given by ________

\(σ_z=q\left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
\(σ_z=q\left[1+\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
\(σ_z=q\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}} \)
\(σ_z=q\left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{5}{2}}\right] \)

Discuss Question

Answer: Option A. -> \(σ_z=q\left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
Answer: (a).\(σ_z=q\left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)

Question 152. When the maximum vertical stress is 0.235 kN/m² at a radial distance of 4m from the point load is __________ kN.

42.34
10.56
20.76
30.65

Discuss Question

Answer: Option A. -> 42.34
Answer: (a).42.34

Question 153. The Boussinesq influence factor for r/z ratio equal to 1 is given by ____________

0.3840
0.5465
0.0844
0.2312

Discuss Question

Answer: Option C. -> 0.0844
Answer: (c).0.0844

Question 154. The Boussinesq influence factor for uniformly distributed circular area is given by ____________

\(K_B= \left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
\(K_B= \left[1+\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
\(K_B= \left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}} \)
\(K_B= q\left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{5}{2}}\right] \)

Discuss Question

Answer: Option A. -> \(K_B= \left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)
Answer: (a).\(K_B= \left[1-\left[\frac{1}{1+(\frac{a}{z})^2}\right]^{\frac{3}{2}}\right] \)

Question 155. If θ is the apex angle which the line joining the apex makes with the outer edge of the loading of a circular area, then the Boussinesq’s vertical pressure σz under a uniformly loaded circular area is given by ______________

σz=q[1-sin³θ]
σz=q[1-cos³θ]
σz=q[1-tan³θ]
σz=q[1-cos²θ]

Discuss Question

Answer: Option B. -> σz=q[1-cos³θ]
Answer: (b).σz=q[1-cos³θ]

Question 156. The Boussinesq’s vertical pressure σz due to line load is given by ________

\(σ_z=\frac{5q’}{πz}\frac{1}{[1+\frac{x}{z}^2 ]^2} \)
\(σ_z=\frac{3q’}{πz}\frac{1}{[1+(\frac{x}{z})^2 ]^2} \)
\(σ_z=\frac{2q’}{πz}\frac{1}{[1+(\frac{x}{z})^2 ]^2} \)
\(σ_z=\frac{2q’}{z}\frac{1}{[1+⌊\frac{x}{z}⌋^2 ]^2} \)

Discuss Question

Answer: Option C. -> \(σ_z=\frac{2q’}{πz}\frac{1}{[1+(\frac{x}{z})^2 ]^2} \)
Answer: (c).\(σ_z=\frac{2q’}{πz}\frac{1}{[1+(\frac{x}{z})^2 ]^2} \)

Question 157. The Boussinesq’s vertical pressure σz due to line load at a point situated vertically below the line load is given by ________

\(σ_z=\frac{2q’}{πz}\)
\(σ_z=\frac{3q’}{πz}\)
\(σ_z=\frac{2q’}{πz}\frac{1}{[1+(z)^2 ]^2} \)
\(σ_z=\frac{2q’}{z}\)

Discuss Question

Answer: Option A. -> \(σ_z=\frac{2q’}{πz}\)
Answer: (a).\(σ_z=\frac{2q’}{πz}\)

Question 158. If θ is the angle subtended by the edges of the strip load, then the Boussinesq’s vertical pressure σz due to strip load is given by ________