1. Lapping
  2. Electropolishing
  3. Superfinishing
  4. Honing
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1 Answers

Option 2 : Electropolishing

Explanation:-

Polishing and plating are generally considered to be a part of the finishing process. There are different polishing processes: 
  • Conventional polishing: In conventional polishing, surface irregularities are removed from the workpiece by using abrasive particles which are glued to a flexible wheel or a belt
  • Buffing: Buffing operation is carried out after polishing with a finer abrasive to further smoothen the surface and to provide the surface with a lustrous, grain less finish
  • Barrel polishing or Tumbling: This is a deburring operation used for surface polishing
  • Electropolishing: Electro polishing is a reverse process of electroplating

Lapping

  • It is used to produce finished surfaces. It gives a very high degree of accuracy and smoothness.

Honing 

  • is a finishing process, in which a tool called hone carries out a combined rotary and reciprocating motion while the workpiece does not perform any working motion. The surface finish of the cylindrical hole is maintained by honing.
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