Pavement Design Practice Questions

If the Fore Bearing of the lines $AB$ and $BC$ are $60^\circ$ and $122^\circ$ , respectively, then the interior angle $\angle ABC$ (in degrees) is ______ (round off to the nearest integer).

Match the following in Column I with Column II.

The recommended minimum traffic growth rate and design period considered for structural design of flexible pavements for national highways in India as per IRC 37:2018 is ______ percentage and ______ years, respectively.

The following data is obtained from an axle load survey at a site: Average rear axle load $-12000 \mathrm{~kg}$ . Number of commercial vehicles $=800$ per day The pavement at this site would be reconstructed over a period of 5 years from the date of survey. The design life of the reconstructed pavement is 15 years. Use the standard axle load as $8160 \mathrm{~kg}$ and the annual average vehicle growth rate as $4.0 \%$ Assume that Equivalent Wheel Load Factor (EWLF) and Vehicle Drainage Factor (VDF) are equal The cumulative standard axle (in msa) for the pavement design is _____(rounded off to 2 decimal places)

In the context of pavement material characterization, the CORRECT statement(s) is/are

For an axle load of 15 tonne on a road, the Vehicle Damage Factor (round off to two decimal places), in terms of the standard axle load of 8 tonne, is _________.

A dowel bar is placed at a contraction joint. When contraction occurs, the concrete slab cracks at predetermined location(s). Identify the arrangement, which shows the correct placement of dowel bar and the place of occurrence of the contraction crack(s).

A road in a hilly terrain is to be laid at a gradient of 4.5%. A horizontal curve of radius 100 m is laid at a location on this road. Gradient needs to be eased due to combination of curved horizontal and vertical profiles of the road. As per IRC, the compensated gradient (in %, round off to one decimal place), is ______

A parabolic vertical curve is being designed to join a road of grade +5% with a road of grade -3%. The length of the vertical curve is 400m measured along the horizontal. The vertical point of curvature (VPC) is located on the road of grade +5%. The difference in height between VPC and vertical point of intersection (VPI) (in m, round off to the nearest integer)is _____

A flexible pavement has the following class of loads during a particular hour of the day. i. 80 buses with 2-axles (each axle load of 40 kN); ii. 160 trucks with 2-axles (front and rear axle loads of 40 kN and 80 kN, respectively) The equivalent standard axle load repetitions for this vehicle combination as per IRC:37-2012 would be

Average free flow speed and the jam density observed on a roadstretch are 60 km/h and 120 vehicles/km, respectively. For a linear speed-density relationship, the maximum flow on the road stretch (in vehicles/h) is _________

Given the following data: design life n = 15 years, lane distribution factor D = 0.75, annual rate of growth of commercial vehicles r = 6%, vehicle damage factor F = 4 and initial traffic in the year of completion of construction = 3000 Commercial Vehicles Per Day (CVPD). As per IRC:37-2012, the design traffic in terms of cumulative number of standard axles (in million standard axles, up to two decimal places) is ______

The radii of relative stiffness of the rigid pavements P and Q are denoted by $l_{P}$ and $l_{Q}$ , respectively. The geometric and material properties of the concrete slab and underlying soil are given below: The ratio (up to one decimal place) of $l_{P} / l_{Q}$ is _______

In the context of the IRC 58-2011 guidelines for rigid pavement design, consider the following pair of statements. I: Radius of relative stiffness is directly related to modulus of elasticity of concrete and inversely related to Poisson's ratio II: Radius of relative stiffness is directly related to thickness of slab and modulus of subgrade reaction. Which one of the following combinations is correct?

The following statements are related to temperature stresses developed in concrete pavement slabs with free edges (without any restraint): P. The temperature stresses will be zero during both day and night times if the pavement slab is considered weightless Q. The temperature stresses will be compressive at the bottom of the slab during night time if the self-weight of the pavement slab is considered R. The temperature stresses will be compressive at the bottom of the slab during day time if the self -weight of the pavement slab is considered The TRUE statement(s) is(are)

A traffic survey conducted on a road yields an average daily traffic count of 5000 vehicles. The axle load distribution on the same road is given in the following table: The design period of the road is 15 years, the yearly traffic growth rate is 7.5% and the load safety factor(LSF)1.3. If the vehicle damage factor (VDF) is calculated from the above data, the design traffic (in million standard axle load, MSA) is ____________

Select the strength parameter of concrete used in design of plain jointed cement concrete pavements from the following choices:

A pavement designer has arrived at a design traffic of 100 million standard axles for a newly developing national highway as per IRC:37 guidelines using the following data: design life = 15 years, commercial vehicle count before pavement construction = 4500 vehicles/day, annual traffic growth rate = 8%. The vehicle damage factor used in the calculation was

Consider the following statements in the context of cement concrete pavements I : Warping stresses in cement concrete pavements are caused by the seasonal variation in temperature. II : Tie bars are generally provided across transverse joints of cement concrete pavements. The correct option evaluating the above statements is