A loader operator is assigned to fine grading a sub-base for a new asphalt road. The specification requires a tolerance of ±25 mm. Which attachment and technique would typically provide the most precise and efficient results for this task?

Question: A loader operator is assigned to fine grading a sub-base for a new asphalt road. The specification requires a tolerance of ±25 mm. Which attachment and technique would typically provide the most precise and efficient results for this task?

Answer options:

• A 6-way dozer blade in float mode, operated at low speed. ✅ A loader bucket with a laser-guided grading system, operated with smooth, consistent passes.
• A ripper attachment to loosen material, followed by a standard bucket for spreading.
• A compactor attachment to consolidate, then a quick coupler bucket for leveling.

Correct answer: A loader bucket with a laser-guided grading system, operated with smooth, consistent passes.

Explanation: A loader bucket equipped with a laser-guided grading system provides real-time elevation control, allowing for highly precise fine grading within tight tolerances, which is crucial for sub-base preparation. A 6-way dozer blade is good for grading but may not offer the same precision as a laser-guided system on a loader bucket for fine sub-base work.