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QUESTION 2 a) Using examples from two or three major incidents, show how the material failure triangle can be used during design of process plant equipment to minimise the likelihood of failures occurring. b) Using a sketch of a typical stress-strain curve, confirm how the Youngs Modulus, 0.2% Proof Stress and the Uitimate tensile strength of material are determined graphically from the tensile test data. c) How does crystallographic structure affect macroscopic material properties? Glve examples of materials from each of the three main crystallographic structures that highlight how the behaviour at the atomic level can influence engineering decisions on material selection. d) One critical safety system that can prevent damage to process plant equipment in the event of over-pressurisation is the relief and flare system. Set out the basic functions of the flare system and the main elements contained in every flare system design