(a) Grain size and inter-crystalline structure determine the properties of the metal. Name the three principal components of the microstructures of plain Carbon Steel and differentiate between them (5)

(b) Discuss the changes in the constituents with the addition of carbon in each case mentioning the percentage at which transformation take place. (5)

(c) Enlist the processes used in order to manufacture machinery components from steel Bots. What is forging and explain the types. (6)