Which manufacturing process involves molten metal poured into a mould and allowed to solidify?

• A. Injection Moulding
• B. Forging
• C. Casting
• D. Extrusion

Answer: (C)

Casting is the process where a liquid metal is melted, poured into a mold, and allowed to cool and solidify to take the mold’s shape. The mold defines the final geometry, so complex or hollow shapes can be made as the metal freezes inside the cavity. This distinguishes it from methods like forging, which shapes metal by deformation without pouring molten metal into a mold; extrusion, which forces material through a shaped opening to create a constant cross-section; and injection molding, which involves forcing molten material under pressure into a mold (usually plastics or metal powders, not simply pouring molten metal).