railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Heat Treatment Process Normalizing
Which of the following is true regarding the Normalizing of steels?
1
It is accomplished by heating at least 55°C below the lower transition temperature followed by air cooling
2
It is accomplished by heating at least 55°C above the lower transition temperature followed by furnace cooling
3
It is accomplished by heating at least 55°C above the upper transition temperature followed by furnace cooling
4
It is accomplished by heating at least 55°C above the upper transition temperature followed by air cooling.