Biomedical Engineering Exam: Materials Science - Higher Certificate in Engineering, Exams of Materials science

Download Biomedical Engineering Exam: Materials Science - Higher Certificate in Engineering and more Exams Materials science in PDF only on Docsity! Cork Institute of Technology Higher Certificate in Engineering in Biomedical Engineering – Stage 1 (National Certificate in Engineering in Biomedical Engineering – Stage 1) (NFQ - Level 6) Autumn 2005 Materials Science (Time: 3 Hours) Answer any FIVE Questions Examiner: Mr. James Calvey All questions carry equal marks Mr. D. Tallon Prof. P. McHugh Q1. (a) Iron is said to be a polymorphic element. Explain what this means and discuss the effect it has when iron is mixed with carbon. (10 marks) (b) Explain the difference between crystals and grains when referring to the structure of a metal. (10 marks) Q2. (a) List three mechanical properties of materials and with the aid of a sketch describe one in detail. (10 marks) (b) Distinguish between hot working and cold working of metals and discuss the effect each have on the crystals of the metal. (10 marks) Q3. (a) Fig.1 shows a typical tensile test curve for an engineering material. State what material could have been used in this test. Give reasons for your answer. (10 marks) (b) List three factors that should be taken into account when analyzing tensile test data. (10 marks) Q4. (a) In relation to the testing of materials what is meant by NDT? List four NDT methods. (10 marks) (b) Describe one NDT method that could be used to check for very fine surface cracks on a knee implant casting. Include in your answer: • Principle of operation • Equipment used • Advantages/Disadvantages of technique (10 marks)