CPII Road and Pavement Inspection 4

Question 1

The Falling Weight Deflectometer (FWD) primarily evaluates:

Accepted Answer

Structural capacity and layer moduli of the pavement system

Answer

The FWD drops a weight to apply an impulse load and measures deflection basin data used to back-calculate layer moduli and remaining structural life.

Question 2

Which type of pavement marking retroreflectivity measurement device is most commonly used by state DOTs for compliance with MUTCD requirements?

Accepted Answer

Retroreflectometer

Answer

Handheld or mobile retroreflectometers measure the retroreflectivity of pavement markings in mcd/m²/lux to ensure MUTCD minimum values are met.

Question 3

Under AASHTO Pavement Design, the Structural Number (SN) is calculated using:

Accepted Answer

Layer thicknesses multiplied by their respective layer coefficients and drainage factors

Answer

SN = Σ(aᵢ × Dᵢ × mᵢ), where a is the layer coefficient, D is thickness, and m is the drainage coefficient for each pavement layer.

Question 4

Which drainage feature along a roadway is inspected specifically to ensure it conveys water away from the pavement edge without undermining the shoulder?

Accepted Answer

Edge drain outlet

Answer

Edge drain outlets discharge subsurface water collected by edge drains; inspectors check for blockages, erosion at the outlet, and daylight pipe integrity.

Question 5

Polished aggregate in pavement surface is a concern primarily because it reduces:

Accepted Answer

Surface friction and skid resistance

Answer

Traffic wear rounds and polishes coarse aggregate particles, reducing micro-texture and skid resistance, increasing crash risk especially in wet conditions.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Road and Pavement Inspection 4