What was the main benefit of the interchangeable parts created by eli whitney? 1)a heavily damaged part could be repaired and used in any other machine. 2)the same parts could be used to replace broken parts in the same type of machine. 3)the same person could work in different types of factories without many skills. 4)once a part of a machine was damaged, it could still function without repairs. 5)the same machine could function in different factories, regardless of its function.