MatE272_Practice Exam #1

MatE272_Practice Exam #1 - MatE 272 Fall 2003 Exam 1 Last...

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MatE 272 Fall 2003 Exam 1 Last Name_____________________ First Name_____________________ Use PENCIL and fill in correct answer Questions 1-18 worth 5 pts each Questions 19-22 worth 10 pts each Answer H is “I don’t know” worth 1 pt each 1. A B C D E F G 2. A B C D E F G 3. A B C D E F G 4. A C D E F G 5. A B C D E F G 6. A B C D E F G 7. A B C D E F G 8. A B C D E F G 9. A B C D E F G 10. A B D E F G 11. A B D E F G 12. A B C D E F G 13. A B C D E F G 14. A C D E F G 15. A B C D E F G 16. A B C D E F G 17. A B C D E F G 18. A B D E F G 19. A B C D E F G B C D E F G 21. A B C D E F G 22. A B C D E F G Table  1 Met al        St ruct ure  Ato mic Radius    (Å) Lead FCC 1.75 0  Gold 1.44 2  Sodium BCC 1.86 0 Alumin um 1.43 1  Tungst en 1.37 1  Chromiu m 1.25 0 Copper 1.27 8 Cobalt HCP 1.25 3 Barium 2.17 0 Iron  ( α ) 1.24 1 Vanadium 1.32 0 Figure 2 Figure 1 Handy Constant’s k = 8.62 x10 -5 eV/atom-K R = 8.13 J/mol-K N A = 6.023x10 23 atoms/mole H H H H H H H H H H H H H H H H H H H H H H Mg Pb
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Questions 1-11 (5 pts each) You may need to use data located on the cover/answer sheet 1. The tensile strength of the metal depicted in Figure 1 is approximately, A) 1400 MPa B) 1000 MPa C) 1930 MPa D) 1200 MPa E) 20,000 MPa F)   1790 MPa 2. The linear density of the <001> in and ideal metallic HCP crystal structure is? A) 0.61 B) 1.00 C) 0.75 D) 0.58 E) 0.40 F) 0.25 3. The diffusion coefficient for aluminum in silicon is D Al in Si =3x10 -16 cm 2 /sec at 300K. What is a reasonable value for D Al in Si at 600K in cm 2 /sec?
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MatE272_Practice Exam #1 - MatE 272 Fall 2003 Exam 1 Last...

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