Question

How many methods of evaluation of uncertainty are based upon modern approach?

(a) 2 methods namely Type-A and Type-B

(b) 2 methods namely Type-1 and Type-2

(c) 3 methods namely Type-A, Type-B and Type-C

(d) 3 methods namely Type-1, Type-2 and Type-3

I had been asked this question in semester exam.

The origin of the question is Evaluating Uncertainty in Measurement in chapter Evaluating Uncertainty in Measurement of Engineering Metrology

Answer 1

The correct choice is (a) 2 methods namely Type-A and Type-B

The best I can explain: Modern approach is based on Type A method and Type B method. When observations are taken under same measurement conditions, Type A method is used. In type B method of modern approach, the uncertainty in measurement is evaluated by the judgement of the available information.