Question

What is the coverage factor in a Type-B method?

(a) Any numerical value only

(b) A multiple of sigma only

(c) A numerical value or multiple of sigma

(d) Always equal to one

I have been asked this question in exam.

The query is from Type B Evaluation of Standard Uncertainty topic in section Evaluating Uncertainty in Measurement of Engineering Metrology

Answer 1

Right option is (c) A numerical value or multiple of sigma

Easy explanation: The coverage factor is specified either as one numerical value or may be stated at a multiple of sigma. The uncertainty or we can say standard can be obtained by the dividing the given value by the multiple.