Exam_2_Practice

Exam_2_Practice - MSE 201 section: Practice Exam #2 Spring,...

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MSE 201 Practice Exam #2 Spring, 2009 Circle your section: Name (print)__________ ________________________________ Sec. 1 M/W (Yingling) Sec. 2 Tu/Th (Irving) I have neither given nor received unauthorized aid on this test. X________________ (signature) No notes, books, or information stored in calculator memories may be used. Cheating will be punished severely. All of your work must be written on these pages and turned in. To receive full or partial credit on numerical problems, you must show your calculations in step-by-step fashion. Units must be shown when applicable and all plots must have labeled axes . Be sure that you read and answer all parts of each question . Multiple choice questions (3 points each): Carefully circle or write only one answer. 1. Diffusion of Ni impurities (solute) in Cu (solvent) a. is a thermally activated process b. increases in rate with increasing temperature c. requires the presence of vacancies d. all of the above 2. In most metals, interstitial diffusion is more rapid than vacancy diffusion because: a. the diffusing atoms are smaller b. there are more open sites c. it is not more rapid than vacancy diffusion d. both a and b 3. Fick’s second law is used: a. in cases of steady-state diffusion b. when there is a constant concentration gradient throughout the material c. in cases of non-steady-state diffusion d. when there is a constant driving force through the solid 4. Necking in the stress-strain testing refers to: a. fracture without any deformation b. transition from elastic to plastic deformation c. large reduction in cross-sectional area in a localized region d. none of the above 5. Which of the following processes makes a material more ductile?
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Exam_2_Practice - MSE 201 section: Practice Exam #2 Spring,...

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