Which finishing process has a high degree of dimensional accuracy

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ISRO_Technician-B (Fitter) Official Paper held on 24 Mar 2019
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  1. Drilling
  2. Turning
  3. Grinding
  4. Lapping

Answer (Detailed Solution Below)

Option 4 : Lapping
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Explanation:

Drilling is the production of cylindrical holes of definite diameters in workpieces by using a multi-point cutting tool called a ‘drill’. It is the first operation done internally for any further operation.

reamer is a multi-point cutting tool used for enlarging by finishing previously drilled holes to accurate sizes.

Honing is a superfinishing process carried out using abrasive sticks for the removal of stock from metallic and non-metallic surfaces. This process produces a high surface finish, corrects the profiles of cylindrical surfaces, removes taper.

Lapping is a precision finishing operation carried out using fine abrasive materials. This process improves geometrical accuracy, refines surface finish, assists in achieving a high degree of dimensional accuracy.

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