engineering recuitment NCRTC Junior Maintainer Mock Test Series 2025 Production Engineering (Manufacturing) Metrology and Inspection Surface Roughness
Which of following polishing paper is not used for intermediate polishing during sample preparation?
1
Diamond 15 µm to 9 µm / Hard-woven or hard-pressed cloths
2
Diamond 9 µm to 3 µm / Hard-woven or lightly pile cloths
3
Diamond 3 µm to 0.5 µm / Oxide polishing 0.1 µm to 0.06 µm / Pile or flocked cloths, foamed for oxide suspensions
4
None