Q1: In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

ANS:C - high speed steel

General purpose drills are typically made of high speed steel (HSS). High speed steel is a type of tool steel known for its excellent combination of hardness, wear resistance, and heat resistance. These properties make HSS suitable for a wide range of cutting tools, including drills, taps, and milling cutters. In drilling processes, where the metal is removed by both shearing and extrusion, HSS drills can withstand high temperatures generated during cutting and maintain sharp cutting edges, resulting in efficient material removal and longer tool life compared to other materials such as mild steel or high carbon steel.