ISRO Mechanical & Aerospace 2009 - Question 68

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The blank size of the gear of 3 mm module and 40 number of teeth is

  • A. 120 mm
  • B. 123 mm
  • C. 126 mm
  • D. 129 mm

Answer: C. 126 mm

Explanation: Blank diameter = Addendum Circle Diameter = $D + 2m = mZ + 2m = 3(40) + 6 = 126$ mm.

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