Pavement System Design
Thickness
Solved Example: 9068-01
Minimum thickness of the base of a flexible pavement is: (UPPCL JE CE Paper I 2014)
A. 15 cm
B. 20 cm
C. 10 cm
D. 5 cm
Correct Answer: C
Subgrade
Solved Example: 9067-01
Given the load, warping and frictional stresses on a cement concrete pavement slab as 220 N/mm$^2$, 300 N/mm$^2$ and 10 N/mm$^2$ respectively, the critical combination of stresses during summer season is: (CIL MT Civil 2020)
A. 300 N/mm$^2$
B. 530 N/mm$^2$
C. 520 N/mm$^2$
D. 510 N/mm$^2$
Correct Answer: D
Solved Example: 9067-02
The contact pressure P$_C$, tyre pressure P, and rigidity factor R are related by: (JKSSB JE CE 2015)
A. $\dfrac{{\rm{P}}}{{{{\rm{P}}_{\rm{C}}}}} = {\rm{R}}$
B. $\dfrac{{{{\rm{P}}_{\rm{C}}}}}{{\rm{P}}} = {\rm{R}}$
C. P $\times$ P$_C$ = R
D. ${\rm{R}} = {\rm{\;}}\sqrt {\left( {{\rm{P}} \times {{\rm{P}}_{\rm{C}}}} \right)}$
Correct Answer: B
Solved Example: 9067-03
Calculate spacing between expansion joints, if the expansion joint gap is 2.0 cm in a cement concrete pavement. The laying temperature is 10 C and the maximum slab temperature in summer is 50 C.($\alpha$ = 10 $\times$ 10$^{-6}$) (MP Sub Engg Civil July 2017- Shift II)
A. 30 m
B. 25 m
C. 100 m
D. 20 m
Correct Answer: B
Drainage
Rehabilitation
Solved Example: 9066-01
The design life of flexible pavement is _____ years. (Guj Engg Service 2019)
A. 8
B. 10
C. 12
D. 15
Correct Answer: D
Solved Example: 9066-02
The interface treatment provided to plug in the voids of porous surfaces and to bond loose particles in bituminous pavements is called: (SSC JE CE Oct 2020 Morning)
A. Tack coat
B. Seal coat
C. Prime coat
D. Surface dressing
Correct Answer: C
Solved Example: 9066-03
hich of the following is used in a regular pavement maintenance activity? (MPPSC AE CE 2016 Paper II)
A. Tack coat
B. Prime coat
C. Fog seal
D. None of these are correct
Correct Answer: C
Solved Example: 9066-04
Which of the following it NOT a critical parameter to control cracking and rutting in a flexible pavement? (SSC JE CE Oct 2020 Morning)
A. Tensile strain near the surface close to the edge of the wheel
B. Vertical sub-base strain
C. Vertical subgrade strain
D. Tensile strain at the bottom of bituminous layer
Correct Answer: B