4. A solid in which all similar atoms are in similar positions relative to their

Question

4. A solid in which all similar atoms are in similar positions relative to their neighbors is said to: A. have long range order B. be non-crystalline C. be amorphous D. all of the above 5. Properties that differ according to the direction of measurement are referred as: A. Isotropic B. Anisotropic C. Aspect ratio D. Viscoelastic 6. Diffusion can occur in A. Solid B. Liquid C. Gaseous D. All materials. 7. Example for strengthening mechanism in single-phase material A. Dispersion strengthening B. Precipitation hardening C. Fiber strengthening D. Strain hardening 8. Driving force for recrystallization process is A. Grain boundary energy B. Stored energy of cold work C. Stacking-fault energy D. All of the above 9. Eutectic product in Fe-C system is called A. Pearlite B. Bainite C. Ledeburite D. Spheroidite 10. In the designation of wrought Al alloys, eg. 3m, what does the first digit-3- refer to? A. The main alloying element B. Carbon percentage of the alloy C. Whether it is an ingot or a billet D. Specific alloy heat treatment

Explanation / Answer

4. D all of the above

5. B anisotropic

6. D all

7. A dispersion strengthening

8. C stacking fault energy

9. A pearlite

10. B carbon percentage of the alloy

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