Question

Cores are used to:

• A. Make desired recess in castings
• B. Strengthen moulding sand
• C. Support loose pieces
• D. Remove pattern easily

Hint:

Cores help in forming internal features like holes or cavities in a casting that patterns alone cannot produce.

Answer 1

The Correct Option is A

Cores are used in casting processes to form internal cavities or reentrant angles which cannot be produced using the pattern alone.
They are made of sand or other materials and are inserted into the mould cavity before pouring the molten metal.
When the molten metal solidifies around the core, it leaves a void or hollow in the casting corresponding to the core’s shape.
Hence, cores help create recesses, holes, or complex interior features in castings.