What is the acceptable maximum roughness of a repaired crater in inches?

The acceptable maximum roughness of a repaired crater is determined by specific standards in engineering and construction that dictate how smooth a surface should be after repairs. The correct range indicates that the repaired surface can have a maximum roughness of +6 inches, but it cannot exceed this value as it would compromise the integrity and functionality of the repair. The minimum allowed roughness of -2 inches suggests that the surface must be smooth enough to ensure safety and proper operation.

This specification is important for maintaining the overall quality of the repair work. Surfaces that deviate too much from these measurements can lead to issues such as uneven wear or structural failure. Therefore, adhering to the +6 and -2 inch roughness requirement ensures that the repair solutions are effective and aligned with regulatory standards, enhancing both safety and performance.