The annealing process is carried out by heating the steel above the critical range, soaking it for sufficient time to allow the necessary changes to occur, and cooling at a predetermined rate, usually very slowly, within the furnace.
15) The process of heating steel to a specified temperature and then cooling at a controlled rate, to soften the steel and remove internal stresses is called
ISRO Draughtsman-B Mechanical Question Paper - 2019 (Set -1) with Answer KeyFor more MCQ's Click Here
Related ISRO Draughtsman-B Mechanical Question Paper - 2019 (Set -1) with Answer Key
If PCD 240mm , then answer will be 60