MME2503 SEM 1 2013 2014 copy - MME 2501/2503 INTERNATIONAL...

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MME 2501/2503 1 INTERNATIONAL ISLAMIC UNIVERSITY MALAYSIA KULLIYYAH OF ENGINEERING END OF SEMESTER EXAMINATION SEMESTER I, 2013/2014 SESSION Programme : MATERIALS ENGINEERING Level of Study : UG 2 Time : 03:00 pm 06:00 pm Date: 3 th of Jan. 2014 Duration : 3 Hrs Course Code : MME 2501 / MME 2503 Section(s): 1, 2, 3, 4, 5, 6 Course Title : Engineering Materials / Materials Science and Engineering This question paper consists of Nine (9) printed pages (including cover page and Appendix) with Five (5) Questions. INSTRUCTION(S) TO CANDIDATES DO NOT OPEN UNTIL YOU ARE ASKED TO DO SO Answer any Four (4) out of Five (5) questions provided. Answers should be clear and intelligible. Justify your answer with simplification of intermediate steps for full marks. No book, notes and programmable calculator are permitted Total Marks for this paper is 100. Any form of cheating or attempt to cheat is a serious offence which may lead to dismissal
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MME 2501/2503 2 Q1 (25 Marks) a) List two (2) measuring techniques that may be taken to increase the resistance of fatigue of a metal alloy. (2 marks) b) A cylindrical specimen of aluminum having a diameter of 12.8 mm and a gauge length of 50.800 mm is pulled in tension. Using the load elongation characteristic data shown in Table Q1, answer the following questions: Table Q1: Load elongation characteristic Load (N) Length (mm) 0 50.800 7,330 50.851 15,100 50.902 23,100 50.952 30,400 51.003 34,400 51.054 38,400 51.308 41,300 51.816 44,800 52.832 46,200 53.848 47,300 54.864 47,500 55.880 46,100 56.896 44,800 57.658 42,600 58.420 36,400 59.182 Fracture i) Plot the data as engineering stress versus engineering stain. (3 marks) ii) Compute the modulus of elasticity. (2 marks) iii) Determine the yield strength at a strain offset of 0.002.
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