railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Heat Treatment Process Normalizing
During normalizing process of steel, the specimen is heated _______.
1
above the upper critical temperature and cooled in still air
2
below the upper critical temperature and cooled in still air
3
below the lower critical temperature and cooled in still air
4
above the upper critical temperature and cooled in the furnace