Used to identify pipe and fitting sizes in plumbing. Refers to the inside diameter of the pipe which can vary by thickness of the pipe. The outside is a constant size. For copper pipe the outside diameter is always 1/8 larger than the nominal size. Example: 1/2 nominal is always 5/8.
Competency-based learning or Competency-Based Education and Training is an approach to teaching and learning more often used in learning concrete skills than abstract learning. It differs from other non-related approaches in that the unit of learning is extremely fine grained.
Competency-based learning is an educational technique that can be applied in many fields and learning environments. It is an area of pedagogical research and is not adequately understood in one, single learning domain, such as that which follows in this article. The rest of this article focuses one application of competency-based learning in corporate environments and is heavily weighted to a Human Resources perspective.