Question

What is not a use of rocker-arm components in automatic gauging system?

(a) Amplify motion

(b) Enable probe to reach very difficult areas

(c) Enable positioning of part

(d) Transfer movement from datum through not more than one pivot points

This question was posed to me in an interview for internship.

My doubt stems from Automatic Inspection Machines in chapter Testing and Calibration of Gauges and Dynamic Measurement of Engineering Metrology

Answer 1

Correct choice is (d) Transfer movement from datum through not more than one pivot points

The explanation: Rocker-arm components could be used for more accuracy to transfer movement from the datum through one or more pivot points to the probe. Advantage of such a system amplifies the motion, enables probe to areas which are difficult to reach, and enables positioning of part.