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At what measurement is the speed of electric files indicated?

  1. WPM

  2. RPM

  3. PSI

  4. MBH

The correct answer is: RPM

The speed of electric files is indicated in RPM, which stands for revolutions per minute. This measurement conveys how many complete revolutions the file's motor makes in one minute, providing a clear indication of the tool's speed and efficiency. Understanding RPM is crucial for nail technicians as it helps determine the proper setting needed for various tasks, such as filing, shaping, and smoothing nails. A higher RPM allows for quicker filing but also requires greater care to avoid damage, while a lower RPM can be preferred for more delicate work.