A machining process where material rotates on a lathe while a cutting tool shapes it.

• A. Turning
• B. Milling
• C. Anodising
• D. Soldering

Answer: (A)

Turning describes a machining process in which the workpiece is mounted in a lathe and made to rotate while a cutting tool removes material to shape it. The defining feature is the rotation of the workpiece on the lathe as the tool cuts, producing cylindrical forms such as shafts, faces, or threaded sections. This contrasts with milling, where the cutting tool (not the workpiece) typically rotates and the workpiece is moved in multiple directions to create features. Anodising is a surface treatment that thickens the oxide layer for protection or appearance, not a cutting operation. Soldering joins parts using a filler metal, which also doesn’t involve shaping the workpiece by cutting.