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.
Simply put, competency-based education measures learning rather than seat time. The traditional higher-education model, the format most of us are familiar with, does the opposite â measuring the time students are in class, usually in credit hours or semester hours.