hardness test
nounUK /ˈhɑːdnəs tɛst/
US /ˈhɑːrdnəs tɛst/
A hardness test is a way to find out how hard or soft something is.
The scientist did a hardness test on the rock to see how strong it was.
OTHER MEANINGS
2. A test that measures how resistant a material is to being scratched or dented.
The hardness test showed the metal could take a lot of pressure.
3. A procedure used in engineering to check the quality of a material.
Engineers ran a hardness test on the new parts before using them.
4. A way to compare how tough different rocks or minerals are.
A simple hardness test can tell you if a stone is diamond or glass.