Question

How is scrap iron separated from a heap of waste materials in factories?

Answer 1

In factories, scrap iron is separated from the heap of waste materials by using big electromagnets fitted to a crane. When such a crane is lowered on to the heap of waste materials, then the scrap iron objects present in the heap, cling to the electromagnet. The crane is then moved up and away to drop these scrap iron objects at a separate place.