ISRO Mechanical & Aerospace 2018 - Question 37

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Topic: Metrology

A hole is of dimension phi 60 (+0.015 / +0.000) and the corresponding shaft is of dimension phi 60 (+0.011 / +0.001). When they are assembled they will form a

  • A. interference fit
  • B. clearance fit
  • C. transition fit
  • D. none of these

Answer: C. transition fit

Explanation: Upper size of hole = 60.015 mm. Upper size of shaft = 60.011 mm. The upper size of the shaft is more than the lower size of the hole (60mm) but less than the upper size of the hole. So the assembled parts make a transition fit.

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