21) Which one of the following metals is corrosion-resistant ?
Related Metals MCQ - Machinist(Set-1) with Answers
Hardness is a very important property of the metals and has a wide variety of meanings. It embraces many different properties such as resistance to wear, scratching, deformation and machinability etc. It also means the ability of the metal to cut another metal.
The hardness is usually expressed in numbers which are dependent on the method of making the test.