engineering recuitment BHEL Engineer Trainee Mock Test 2025 Engineering Materials Science Structure and Properties of Engineering Materials Properties of Materials
Consider the following statements:
1. The quenching of steel results in an increase in wear resistance, strength and hardness.
2. By the process of case hardening, hard wearing resistant surface is produced on mild steel. This is an effective method for low carbon steels because they cannot be hardened by the process of quenching.
3. When a metal is mixed with small atoms of non-metallic element in such a manner that invading atoms occupy interstitial positions in the metal lattice, an interstitial alloy results.
What of the above statements are correct?
1
1 and 2 only
2
1 and 3 only
3
2 and 3 only
4
1, 2 and 3