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mid+term+1 - Louisiana State University Mechanical...

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Louisiana State University Mechanical Engineering Department ME 2733- Materials of Engineering; Spring 2003 (Section 2) Midterm Exam Part I March 25, 2003 Name:_______________________________ Circle the right answer or choose T (True) or F (False) SOLUTIONS 1. Ionic bonding is directional where metallic bonding is not………… T F 2. FCC structure has larger atomic packing factor than HCP structure … T F 3. In ionic bonding the electrically charged ions are formed by sharing electrons ………………………………………...…………….. T F 5. Coordination number in BCC crystalline structure is 8…………………. T F 6. In an FCC crystalline structure [111] is the densest direction and (110) is the densest atomic plane………………………………. T F 7. Which of the following are not point defects: a) self-interstitials b) dislocations c) impurities d) vacancies e) none of the above 8. In an interstitial solid solution each impurity atom substitute one host atom ………………………………………………………….. T
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