Heavy Equipment Operator Certification Exam Prep · Question
What is the primary advantage of a pneumatic tire roller over a steel drum roller when compacting asphalt pavement immediately behind a paver?
Pneumatic tire rollers offer a kneading action due to their flexible tires, which helps to densify asphalt mixes, reduce permeability, prevent segregation, and
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Question: What is the primary advantage of a pneumatic tire roller over a steel drum roller when compacting asphalt pavement immediately behind a paver?
Answer options:
- Significantly higher compaction force per pass
- Ability to achieve deeper compaction in granular layers ✅ Provides a kneading action that helps densify and seal the surface, reducing segregation
- Faster travel speeds can be maintained without affecting compaction quality
Correct answer: Provides a kneading action that helps densify and seal the surface, reducing segregation
Explanation: Pneumatic tire rollers offer a kneading action due to their flexible tires, which helps to densify asphalt mixes, reduce permeability, prevent segregation, and achieve a tight, sealed surface without cracking.
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