Arizona State Board Nail Technology Practice Exam

How is grit defined in relation to nail files?

1. By the material used in the files

2. By the number of abrasive particles per square inch

3. By the thickness of the file

4. By the manufacturer of the file

The correct answer is: By the number of abrasive particles per square inch

Grit is defined specifically by the number of abrasive particles per square inch on a nail file. This measurement determines the file's abrasiveness and how coarse or fine it is. A lower grit number indicates a coarser file, suitable for filing down thick or hard materials quickly, while a higher grit number refers to a finer file that smooths and polishes the surface of the nails. Understanding this concept is crucial for nail technicians, as using the appropriate grit for a specific purpose is essential to achieving the desired results in nail care services. The other choices relate to aspects of the file but do not accurately define grit in the context of nail files.