Sewage Treatment Worker Practice Test 2026 - Free Sewage Treatment Operator Practice Questions and Study Guide

Question: 1 / 400

Which of the following methods is NOT used to test the hardness of a metal?

Mohs Hardness Test

Brinell Hardness Test

Rockwell Hardness Test

Pyrometer

The pyrometer is a device used to measure high temperatures, often in metal processing and manufacturing contexts, but it does not measure the hardness of a metal. Hardness testing refers specifically to methods that assess a material's resistance to deformation, scratching, or indentation. In contrast, the Mohs Hardness Test, Brinell Hardness Test, and Rockwell Hardness Test are all established methods specifically designed to evaluate the hardness of various materials, including metals.

The Mohs Hardness Test ranks minerals based on their scratch resistance, while the Brinell and Rockwell tests involve applying specific loads to determine how much a metal deforms. Therefore, the pyrometer does not fit within the category of hardness testing methods.

Get further explanation with Examzify DeepDiveBeta
Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy