General Studies · Surface Finish and Roughness
Which of the following indicates the mean roughness index (Ra value) for the surface roughness grade N8?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 16.3 μm
- 21.6 μm
- 33.2 μm✓
- 412.5 μm
Correct answer
3.2 μm
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