When feathering, how often should the moldboard be raised?

Feathering involves gradually tapering the edges of the material being graded, which requires a careful, controlled approach. Raising the moldboard every two to three seconds allows for smooth transitions and proper blending of the graded surface. This timing gives the operator sufficient control to adjust the depth and angle of the blade without overworking the material, which can lead to uneven surfaces or potential damage to the grader.

Raising the moldboard too frequently, such as every second or every millisecond, could disrupt the grading process, leading to erratic operations and inconsistencies in the finished surface. On the other hand, waiting too long, like five seconds, might not allow the operator to adjust the blade effectively as they respond to changes in the terrain or material being graded. Therefore, the two to three seconds interval is optimal for achieving a smooth, well-graded surface, making it the most suitable answer.