Heavy Equipment Operator Certification Exam Prep · Question
During road construction, after aggregate has been laid, achieving maximum compaction deep into the sub-base is critical. Which compactor type is typically used for this application, particularly with granular soils?
A vibratory padfoot (or tamping foot) compactor is engineered with 'feet' that penetrate deep into cohesive and granular soils, applying both static pressure an
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Question: During road construction, after aggregate has been laid, achieving maximum compaction deep into the sub-base is critical. Which compactor type is typically used for this application, particularly with granular soils?
Answer options:
- Smooth Drum Compactor
- Pneumatic Tire Roller
- Sheepsfoot Compactor ✅ Vibratory Padfoot Compactor
Correct answer: Vibratory Padfoot Compactor
Explanation: A vibratory padfoot (or tamping foot) compactor is engineered with 'feet' that penetrate deep into cohesive and granular soils, applying both static pressure and dynamic force (vibration) to achieve optimal compaction at depth for sub-base materials.
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