ISRO Mechanical & Aerospace 2017 - Question 12

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Topic: Manufacturing

In tolerancing of a part, unless otherwise specified, individual features of size must

  • A. not violate size limits of MMC at any cross section
  • B. not violate an envelope of perfect form at LMC
  • C. not violate an envelope of perfect form at MMC
  • D. None of these

Answer: C. not violate an envelope of perfect form at MMC

Explanation: This is Taylor's principle of gauging. It ensures that a feature at its Maximum Material Condition (MMC) will have perfect form, which is critical for interchangeability.

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