Topic: Metrology and Inspection
As per IT 5, standard tolerance unit (i) is equal to
- A. 0.002 + 0.8 D
- B. 0.8 + 0.002 D
- C. 0.45 * D^(1/3) + 0.001 D
- D. 0.001 * D^(1/3) + 0.45 D
Answer: C. 0.45 * D^(1/3) + 0.001 D
Explanation: The standard tolerance unit 'i', typically expressed in microns (micrometers), is empirically calculated using the formula i = 0.45 * D^(1/3) + 0.001 * D, where D is the geometric mean diameter in millimeters.