The cold forming process in which a hardened tool is pressed against a workpiece

Q. The cold forming process in which a hardened tool is pressed against a workpiece (when there is relative motion between the tool and the workpiece) to produce a roughened surface with a regular pattern is

             (A) Roll forming      (B) Strip rolling          (C) Knurling            (D) Chamfering

Ans: Knurling           

Sol:

It is a process of impressing a diamond shaped or straight line pattern on the surface by a workpiece by using specially shaped hardened metal wheels to improve its appearance and to provide a better gripping surface.