Question 3 (20 marks) a) Explain the importance of surface coating of metal parts. (4 marks) b) Surface processing operations are important for the lifespan of a component. Explain how can hot dip galvanising contribute to sustainability? c) Describe the stage of hot dip galvanising process. d) Explain three purposes of surface processing operations. (4 marks) (4 marks) (4 marks) e) One of the way to achieve clean surfaces is through surface processing operations. Describe 2 methods to achieve clean surfaces. (4 marks)

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