In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of (A) Stainless steel (B) Mild steel (C) High speed steel (D) High carbon steel

In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of
(A) Stainless steel
(B) Mild steel
(C) High speed steel
(D) High carbon steel
by

1 Answer

Answer :

(C) High speed steel
by

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