The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.?

Answer: Option 4 For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is 22 m/min and for a mild steel is 30 m/min

Answer: Option 3

Answer: Option 3

Answer: Option 2

Answer: Option 2

Answer: Option 4

Answer: Option 2

Answer: Option 4

Answer: Option 2 A slightly oxidizing flame is used in torch brazing of steel and cast iron. A stronger oxidizing flame is used in the welding of brass or bronze.

Answer: Option 3 The welding process used in joining mild steel shanks to high speed drills is Flash butt welding