Intro to Millwright Practice Exam

Abrasive stones can be categorized into which of the following?

1. Shapes

2. Colors

3. Grits

4. Sizes

The correct answer is: Grits

Abrasive stones are primarily categorized by their grit size, which refers to the coarseness or fineness of the abrasive material. This characteristic determines how effectively the stone can cut or polish various materials. Grit sizes are standardized, often indicated by a number; for example, a lower number signifies a coarser grit, while a higher number indicates a finer grit. Selecting the appropriate grit size is crucial for achieving the desired finish on the workpiece. While abrasive stones can also be identified by their shapes, colors, and sizes, these aspects do not directly relate to their functional performance in grinding or polishing processes as grit size does. The grit directly impacts the cutting action, surface finish, and overall outcome of the machining or polishing operation, making it the primary categorization for abrasive stones.