PIC Paving Procedures & Equipment Operation 2

Question 1

What is the primary purpose of a vibratory screed on an asphalt paver?

Accepted Answer

To consolidate and level the asphalt mat before compaction

Answer

The vibratory screed pre-consolidates and strikes off the asphalt mat to the desired thickness and initial density before roller compaction begins.

Question 2

When a paving inspector observes 'fat spots' or shiny areas in the asphalt mat, what is the most likely cause?

Accepted Answer

Segregation or excess asphalt binder accumulation

Answer

Fat spots indicate areas where excess binder has risen to the surface, often caused by mix segregation or improper mix design with too high a binder content.

Question 3

At what minimum temperature should a breakdown roller typically begin compacting a standard dense-graded HMA mat?

Accepted Answer

275°F (135°C)

Answer

Breakdown rolling should begin as soon as possible after placement, typically when the mat temperature is at or above 275°F (135°C) to achieve proper compaction.

Question 4

Which paver component controls the auger speed and is critical for maintaining a consistent head of material?

Accepted Answer

The material feed system (conveyor/auger controls)

Answer

The material feed system, including conveyor and auger controls, regulates how much mix is delivered to maintain a consistent head of material in front of the screed.

Question 5

What type of roller is best suited for the finish rolling phase of HMA compaction?

Accepted Answer

Static steel tandem roller

Answer

Static steel tandem rollers are used during finish rolling to remove any roller marks and achieve a smooth final surface without risk of displacement.

(PIC) Paving Inspector Certification Practice Test

(PIC) Paving Inspector Certification Practice Test

PIC Paving Procedures & Equipment Operation 2