Question

Which of the following is true for Eden-Rolt Millionth Comparator?

(a) Utilise both mechanical and optical magnifications

(b) Only mechanical magnification

(c) Only optical magnification

(d) Only electrical magnification

The question was posed to me in final exam.

This key question is from Uses of Comparators in chapter Comparators of Engineering Metrology

Answer 1

The correct answer is (a) Utilise both mechanical and optical magnifications

To elaborate: Eden-Rolt Millionth is a comparator which utilizes both optical and mechanical magnification that means it can utilize advantages of both optical and mechanical comparators hence it is a highly sensitive comparator. Design of this comparator is economical and simple.