Question

Which of the following option is correct about bench micrometer?

Statement 1: Friction free motion transfer between anvil and indicator.

Statement 2: Anvil is retractable by trigger control.

(a) Statement 1 is correct

(b) Statement 2 is correct

(c) Both the statements are correct

(d) Both the statements are incorrect

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

I'd like to ask this question from Bench Micrometer topic in chapter Linear Measurements of Engineering Metrology

Answer 1

The correct option is (c) Both the statements are correct

Explanation: There is a mechanism for linear friction free motion transfer between anvil and indicator. This is to achieve high accuracy. Retracting of the anvil is done by trigger control. Work is placed between spindle and anvil after retracting and then released.