Heavy Equipment Operator Certification Exam Prep · Question
You are compacting a soil-cement base. To prevent cracking of the stabilized layer during compaction and to achieve a smooth finish, which compactor type would be the most appropriate final roller?
Pneumatic tire rollers provide a kneading action and uniform pressure across the surface, which helps prevent cracking in stabilized materials like soil-cement
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Question: You are compacting a soil-cement base. To prevent cracking of the stabilized layer during compaction and to achieve a smooth finish, which compactor type would be the most appropriate final roller?
Answer options:
- Padfoot roller
- Grid roller ✅ Pneumatic tire roller
- Single drum vibratory roller with aggressive amplitude
Correct answer: Pneumatic tire roller
Explanation: Pneumatic tire rollers provide a kneading action and uniform pressure across the surface, which helps prevent cracking in stabilized materials like soil-cement and is excellent for achieving a tight, sealed surface finish.
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