CPII Road and Pavement Inspection 2 — Questions and Answers
Question 1: Which distress type is characterized by crescent-shaped cracks caused by traffic loading on unstable base material?
- Slippage cracking (Correct answer)
- Block cracking
- Alligator cracking
- Transverse cracking
Correct answer: Slippage cracking
Slippage cracking forms crescent or parabolic shapes due to horizontal forces from traffic on a weak pavement-layer bond.
Question 2: When measuring rut depth in the field, inspectors typically use a:
- Deflectometer
- Straight-edge and depth gauge (Correct answer)
- Dynamic cone penetrometer
- Ground-penetrating radar
Correct answer: Straight-edge and depth gauge
A 4-foot straight-edge placed across the rut and a depth gauge or ruler measure the maximum rut depth.
Question 3: A Pavement Condition Index (PCI) score of 25 corresponds to which condition category?
- Good
- Fair
- Poor
- Very Poor (Correct answer)
Correct answer: Very Poor
PCI scores from 0–10 are 'Failed,' 11–25 are 'Very Poor,' 26–40 are 'Poor,' and 41–55 are 'Fair.'
Question 4: Which field test provides a direct measure of pavement surface friction?
- Benkelman Beam test
- Locked-wheel skid resistance test (Correct answer)
- California Bearing Ratio test
- Proctor compaction test
Correct answer: Locked-wheel skid resistance test
The locked-wheel skid resistance test (ASTM E274) drags a test tire at a known speed to measure the Skid Number.
Question 5: Bleeding (flushing) in asphalt pavement is primarily caused by:
- Insufficient asphalt binder content
- Excess asphalt binder migrating to the surface (Correct answer)
- Stripping of aggregate from binder
- Thermal contraction of the pavement
Correct answer: Excess asphalt binder migrating to the surface
Bleeding occurs when excess asphalt binder fills air voids and rises to the pavement surface, creating a shiny, sticky film.
Question 6: Under ASTM D6433, what is the minimum sample unit area for PCI surveys on asphault pavement?
- 100 sq ft
- 230 sq ft (Correct answer)
- 460 sq ft
- 1,000 sq ft
Correct answer: 230 sq ft
ASTM D6433 specifies a sample unit area of 230 ± 93 sq ft (approximately 20 lane-feet of a 12-ft lane) for flexible pavement.
Question 7: Which pavement preservation treatment is best suited for sealing low-severity longitudinal and transverse cracks before they allow water infiltration?
- Mill and overlay
- Crack sealing with hot-applied sealant (Correct answer)
- Full-depth reclamation
- Microsurfacing
Correct answer: Crack sealing with hot-applied sealant
Hot-applied crack sealant routed and sealed into cracks prevents moisture infiltration and slows crack progression at low cost.
CPII Road and Pavement Inspection 2
Which distress type is characterized by crescent-shaped cracks caused by traffic loading on unstable base material?