Q3 (a) Plain carbon steels are iron-carbon alloys in which the properties are primarily derived from the presence of carbon. i. Name the THREE (3) types of plain carbon steels. (3 marks) ii. Compare the carbon composition and mechanical properties of any TWO (2) types of plain carbon steels answered in (i). iii. Give ONE (1) limitation of plain carbon steels. (3 marks) (1 mark) iv. Provide the solution to overcome the limitation of plain carbon steels mentioned in (iii). (2 marks) UTeM (b) In material science and engineering, quenching is the most used technique to harden carbon steel by inducing a martensite transformation. i. Describe the quenching procedures MALAYSIA MELAKA (3 marks) ii. Explain the hardening mechanism of carbon steels through quenching process. (3 marks)