INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the required speed for a high speed rotary tool?

  1. >200,000 rpm

  2. 100,000 rpm

  3. 75,000 rpm

  4. 50,000 rpm

The correct answer is: >200,000 rpm

The required speed for a high speed rotary tool will be greater than 200,000 rpm. This is because high speed rotary tools are designed to operate at extremely fast speeds in order to efficiently cut or grind materials. Option B, 100,000 rpm, may seem like a high speed but it would not be considered high enough for a rotary tool. Options C and D are even lower and would result in slower and less efficient cutting or grinding. Thus, option A, with a speed greater than 200,000 rpm, is the most appropriate choice for a high speed rotary tool.

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