railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Heat Treatment Process Annealing
Copper becomes hard and brittle when mechanically worked, but it can be made soft again by annealing. Within what temperature range must you heat it to anneal it?
1
500°F to 600°F
2
700°F to 900°F
3
900°F to 1100°F
4
600°F to 700°F