Which of the following grinding procedures results in essentially NO change in the dimensions of the workpiece?

In this context, superfinishing is the procedure that results in essentially no change in the dimensions of the workpiece. The superfinishing process is designed to improve surface finish by using very fine abrasives and a controlled, low-pressure method. This technique removes only a minimal amount of material from the surface, often on the order of micrometers, which helps to enhance the surface quality without significantly impacting the overall dimension of the part.

Both lapping and honing, while also aimed at achieving a superior surface finish, are processes that can result in a more noticeable change in the dimensions of the workpiece. Lapping typically involves a loose abrasive that can remove material more aggressively than superfinishing, potentially altering the dimensions. Honing is a similar process that uses a honing tool to remove material and improve geometry, also affecting the final dimensions of the workpiece.

Thus, superfinishing is the most appropriate choice when discussing grinding procedures that lead to minimal dimensional changes.