When operating a grader to cut a final pass on a gravel road, what is the optimal mouldboard angle typically used for fine finishing?

Question: When operating a grader to cut a final pass on a gravel road, what is the optimal mouldboard angle typically used for fine finishing?

Answer options: ✅ Approximately 45-60 degrees

• Approximately 70-80 degrees
• Approximately 20-30 degrees
• Approximately 90 degrees

Correct answer: Approximately 45-60 degrees

Explanation: For fine finishing and spreading, a mouldboard angle of approximately 45-60 degrees is generally used. This angle allows for smooth material flow and better feathering of the material, which is critical for achieving a level and uniform surface. Angles closer to 90 degrees are for heavy cutting or mixing, while very shallow angles can cause material to spill over the top.