MME2503 SEM 3 2013 2014 copy - MME 2503 SPECIAL EXAMINATION...

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MME 2503 1 INTERNATIONAL ISLAMIC UNIVERSITY MALAYSIA KULLIYYAH OF ENGINEERING SPECIAL END OF SEMESTER EXAMINATION SEMESTER III, 2013/2014 SESSION Programme : MATERIALS ENGINEERING Level of Study : UG 2 Time : Date: Duration : 3 Hrs Course Code : MME 2503 Section: 1 Course Title : Engineering Materials This question paper consists of Eight (9) printed pages (including cover page and Appendix) with Four (5) Questions. INSTRUCTION(S) TO CANDIDATES DO NOT OPEN UNTIL YOU ARE ASKED TO DO SO There are FOUR (5) questions in this question booklet. Answer FOUR (4) questions only. 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 SPECIAL EXAMINATION
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MME 2503 2 Q1 (25 marks) a) Sketch the Bohr model atom for carbon atom (3 marks) b) Write the electron configuration for the following elements i. Cu ii. Cr (2 marks) c) Sketch the following in a cubic cell i. (212) ii. (13 2 ) iii. [301] (9 marks) d) Niobium has an atomic radius of 0.1430 nm and a density of 8.57 g/cm 3 . Determine whether it has an FCC or BCC crystal structure. Atomic weight = 92.91 g/mol. (5 marks) e) Explain the mechanism of covalent bonding with one example. (3 marks) f) Show that the atomic packing factor for BCC is 0.68 (3 marks) Q2 (25 Marks) a) Cite three variables that determine the microstructures of an alloy (3 marks) b)
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