Questions and answers for exam Preparation

MCQs

Total Questions : 81 | Page 8 of 9 pages

Question 71. The flexible pavements resist ___________ tensile stresses.

only very small
large
negligible
very large

Discuss Question

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

Question 72. The base course contains __________

granular material
bituminous material
silt
clay

Discuss Question

Answer: Option A. -> granular material
Answer: (a).granular material

Question 73. The base course must possess low resistance to deformation.

True
False
May be True or False
Can't say

Discuss Question

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

Question 74. The sub-base is __________

below the base course
above the base course
below the sub-grade
above the wearing course

Discuss Question

Answer: Option A. -> below the base course
Answer: (a).below the base course

Question 75. The strength of sub-grade is increased by _________

compaction
swelling
bulking
addition of excess of water

Discuss Question

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

Question 76. The maximum legal axle wheel load is _________ kg as specified by IRC.

3473
5466
8170
4085

Discuss Question

Answer: Option C. -> 8170
Answer: (c).8170

Question 77. The maximum stress occurs on __________

vertical plane passing through radial distance of one from the point of load application
vertical plane passing through radial distance of two from the point of load application
vertical plane passing through the point of load application
vertical plane passing through radial distance of three from the point of load application

Discuss Question

Answer: Option C. -> vertical plane passing through the point of load application
Answer: (c).vertical plane passing through the point of load application

Question 78. The stress σz at any point (r,z) below the pavement is __________

\(σ_z=\frac{3P}{2πz^2}\left[\frac{1}{1+(\frac{r}{z})^3}\right]^\frac{5}{2}\)
\(σ_z=\frac{3P}{2πz^2}\left[\frac{1}{(\frac{r}{z})^2}\right]^\frac{5}{2}\)
\(σ_z=\left[\frac{1}{1+(\frac{r}{z})^2}\right]^\frac{5}{2}\)
\(σ_z=\frac{3P}{2πz^2}\left[\frac{1}{1+(\frac{r}{z})^2}\right]^\frac{5}{2}\)

Discuss Question

Answer: Option D. -> \(σ_z=\frac{3P}{2πz^2}\left[\frac{1}{1+(\frac{r}{z})^2}\right]^\frac{5}{2}\)
Answer: (d).\(σ_z=\frac{3P}{2πz^2}\left[\frac{1}{1+(\frac{r}{z})^2}\right]^\frac{5}{2}\)

Question 79. The vertical strain ∈z due to triaxial load (σz,σᵣ,σₜ=σᵣ) under the center of plate is _________

\(∈_z=\frac{1}{E}[σ_z-μ(σ_r)]\)
\(∈_z=\frac{1}{E}[σ_z-2μ(σ_r)]\)
\(∈_z=\frac{1}{E}[σ_z-23μ(σ_r)]\)
\(∈_z=\frac{1}{E}[σ_z-0.43μ(σ_r)]\)

Discuss Question

Answer: Option B. -> \(∈_z=\frac{1}{E}[σ_z-2μ(σ_r)]\)
Answer: (b).\(∈_z=\frac{1}{E}[σ_z-2μ(σ_r)]\)

Question 80. For the loaded circular area of radius a, the vertical stress on a vertical line passing through the center of the loaded area is __________

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

Discuss Question

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