Question

A ratchet screw in a micrometer is provided to

• A. allow zero adjustment
• B. prevent wearing of screw thread
• C. lock the required measurement
• D. maintain constant pressure on the job specimen

Hint:

The ratchet mechanism in a micrometer prevents measurement errors caused by variations in applied pressure ensuring repeatable results

Answer 1

The Correct Option is D

A micrometer features a ratchet screw that applies constant pressure to a specimen, thus ensuring consistent and accurate measurements unaffected by user hand pressure.