can two ppc ever intersect/cut each other?
Yes, two Production Possibility Curves can cross each other. This will happen when the technology used in the production of one good (say Good X) appreciates and the technology employed in the production of the other good (say Good Y) depreciates simultaneously.
In the above diagram, as the technology of Good X appreciates the horizontal intercept slides forward from B to D. Simultaneously, as the technology employed in the production of Good Y depreciates, the vertical intercept of the curve slides downwards from A to C. Therefore, a simultaneous change in the technologies of Good X and Y causes the final PPC to intersect the origin PPC at point E.