PIC Paving Procedures & Equipment Operation 3

Question 1

When constructing a longitudinal joint between two adjacent paving lanes, which practice best ensures joint density?

Accepted Answer

Overlap the second lane 2–3 inches over the first lane edge and shift the roller to confine material

Answer

Overlapping the adjacent lane 2–3 inches and using the roller to confine mix over the joint produces a hot, dense longitudinal joint with minimal air voids.

Question 2

What is the function of the 'angle of attack' (screed angle of incidence) on an asphalt paver?

Accepted Answer

It controls the thickness and density of the mat being laid

Answer

The screed's angle of attack (tow-point angle) controls mat thickness and influences the initial density; a slightly positive angle causes the screed to 'float' and produce a denser mat.

Question 3

During asphalt paving operations, why should a paver stop be avoided whenever possible?

Accepted Answer

Paver stops cause screed marks and bumps that are difficult to remove later

Answer

When a paver stops, the heated screed continues to sit on the mat, over-compacting and potentially causing a bump that produces a roughness defect in the finished pavement.

Question 4

What is the recommended overlap of the steel drum roller on each pass to ensure uniform compaction coverage?

Accepted Answer

6–8 inches

Answer

A 6–8 inch overlap on adjacent roller passes ensures that no strip of mat is missed and that edge areas receive adequate compaction.

Question 5

A paving crew is placing mix in cold weather (45°F air temperature). Which adjustment is most important to maintain mix workability?

Accepted Answer

Reduce paving speed and haul distance, and increase mix delivery temperature

Answer

In cold weather, reducing paving speed, shortening haul distances, and increasing plant delivery temperature are the primary strategies to keep the mix workable long enough to achieve compaction.

(PIC) Paving Inspector Certification Practice Test

(PIC) Paving Inspector Certification Practice Test

PIC Paving Procedures & Equipment Operation 3