Question

Which of the following option is incorrect with respect to radius gauges?

(a) Concave radius is an internal radius

(b) Radius gauges are used for final inspection

(c) If the curved surface is external then this radius is known as female radius

(d) Radius gauges are suitable for both fillet and radius measurement

The question was posed to me by my school principal while I was bunking the class.

Origin of the question is Radius Gauges topic in chapter Linear Measurements of Engineering Metrology

Answer 1

The correct choice is (c) If the curved surface is external then this radius is known as female radius

The best I can explain: If the curved surface is external then it is called male radius or simply radius. Term Female radius is used for internal curved surface.