Question

Which of the following option is not correct for ‘full interchangeability’?

(a) This type of interchangeability is not feasible sometimes

(b) Requires machine which can maintain low process capability

(c) Machines with very high accuracy are necessary

(d) For interchangeable production, this type of interchangeability is not must

This question was addressed to me in class test.

This intriguing question comes from Interchangeability topic in section Limits, Fits and Gauges of Engineering Metrology

Answer 1

Correct answer is (b) Requires machine which can maintain low process capability

Easiest explanation: Full interchangeability is also known as universal interchangeability. Many times, universal interchangeability is not feasible because it requires machine capable of maintaining very high accuracy and high process capability.