Pavement Design Practice Test 6

1. What is the modified equation for maximum stress at the corner?

\(s_c=\frac{3P}{h^2} \left[1-{(\frac{a\sqrt{2}}{l})}^{1.5}\right]\)

\(s_c=\frac{3P}{h^2} \left[1-{(\frac{a\sqrt{2}}{l})}^{0.2}\right]\)

\(s_c=\frac{3P}{h^2} \left[1-{(\frac{a\sqrt{2}}{l})}^{1.2}\right]\)

\(s_c=\frac{3P}{h^2} \left[1-(\frac{a\sqrt{2}}{l})\right]\)

2. Find the elastic modulus of soil when it is subjected to a plate bearing test. The diameter of plate used is 30 cm and the pressure yielded at 0.5 cm deflection is 1.25 kg/cm².

45 kg/cm²

45.25 kg/cm²

44 kg/cm²

44.25 kg/cm²

3. What is the critical combination of the stresses at the edge of the pavement during winter?

Load stress + warping stress

Load stress + warping stress + frictional stress

Load stress - warping stress

Load stress + warping stress - frictional stress

4. In the triaxial method, the equation for the thickness of the pavement can be obtained by bringing ______ term to one side.

5. What type of construction does the below figure represent?

Built-up Grout

Penetration Macadam

Mastic asphalt

Carpet

6. What is the LSF for roads having a low volume of truck traffic taken as?

1.3

1.1

1.2

7. Interface treatment is provided when the maintenance of the pavement is carried out.

True

False

8. ______ indicated that the failure of most concrete slabs occurred at the corner of the slab.

Norman McWell

H. M. Westergaard

A. T. Goldbeck

Chester McDowell

9. Where is the maximum tensile stress developed during mid-day?

Top fibre

Side fibre

Center fibre

Bottom fibre

10. Which of the below is considered to be much superior to other types of base course?

Bituminous sheet

Bituminous carpet

Bituminous macadam

Bituminous concrete