Discussion
Ra value of surface refers to
Answer: C
The Ra value refers to the roughness of surface.
Ra is the arithmetical mean roughness: the average of the absolute heights of the surface profile above and below its mean line, measured over a sampling length, usually in micrometres. A smaller Ra means a smoother surface; a fine ground surface might be around 0.4 µm, a rough turned one several micrometres.
Ra does not describe the coating on a surface, the heat treatment it has had, or its hardness. Those are specified separately on a drawing.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development