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    Material Science/Diffusion Multiple Choice Questions

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    Manish Ga
    This document contains a multiple choice quiz on the topic of material science and diffusion. There are 12 multiple choice questions testing knowledge of concepts like the types of materials diffusion can occur in, common diffusing species, units for diffusivity, factors that influence diffusion rates, and examples of diffusion processes and applications. The questions cover topics such as short-circuit diffusion paths, steady-state diffusion, the influence of temperature on diffusivity, and phenomena used in zone refining processes. Answers to all 12 questions are provided at the end.

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    Material Science/Diffusion Multiple Choice Questions

    Uploaded by

    Manish Ga
    577 views2 pages
    This document contains a multiple choice quiz on the topic of material science and diffusion. There are 12 multiple choice questions testing knowledge of concepts like the types of materials diffusion can occur in, common diffusing species, units for diffusivity, factors that influence diffusion rates, and examples of diffusion processes and applications. The questions cover topics such as short-circuit diffusion paths, steady-state diffusion, the influence of temperature on diffusivity, and phenomena used in zone refining processes. Answers to all 12 questions are provided at the end.

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    MCQ_M5

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    This document contains a multiple choice quiz on the topic of material science and diffusion. There are 12 multiple choice questions testing knowledge of concepts like the types of materials diffusion can occur in, common diffusing species, units for diffusivity, factors that influence diffusion rates, and examples of diffusion processes and applications. The questions cover topics such as short-circuit diffusion paths, steady-state diffusion, the influence of temperature on diffusivity, and phenomena used in zone refining processes. Answers to all 12 questions are provided at the end.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    577 views2 pages

    Material Science/Diffusion Multiple Choice Questions

    Uploaded by

    Manish Ga
    This document contains a multiple choice quiz on the topic of material science and diffusion. There are 12 multiple choice questions testing knowledge of concepts like the types of materials diffusion can occur in, common diffusing species, units for diffusivity, factors that influence diffusion rates, and examples of diffusion processes and applications. The questions cover topics such as short-circuit diffusion paths, steady-state diffusion, the influence of temperature on diffusivity, and phenomena used in zone refining processes. Answers to all 12 questions are provided at the end.

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    Material Science/Diffusion

    Multiple Choice Questions

    Multiple Choice Questions:


    1. Diffusion can occur in ________________ materials. (a) Solid (b) Liquid (c) Gaseous 2. Probably the fastest diffusing species in Fe is (a) H (b) Ni (c) W 3. The value of error function for is (a) - (b) -1 (c) 1 4. The value of error function for 0 is (a) -1 (b) 0 (c) 1 5. The units for diffusivity, D, are (a) m2sec1 (b) m2sec-1 (c) m-2sec-1 6. The following mechanism contributes very little the diffusivity (a) Vacancy (b) Interstitial (c) Substitutional 7. Not an example for short-circuit path (a) Vacancy (b) Dislocations (c) Grain boundaries 8. Example for steady-state diffusion (a) Hydrogen purification by palladium sheet (b) Doping semi-conductors (c) Corrosion resistance of duralumin (d) Decarburization of steel 9. The most influencing factor of diffusivity (a) Diffusing species (b) Temperature (c) Lattice structure 10. The following phenomena are useful in zone-refining process (a) Coring (b) Segregation (c) Both 11. Macro-segregation can be removed by (a) Annealing (b) Hot working (c) Both 12. The following enhances the coring (a) Minute difference between liquidus and solidus (b) Marked difference between liquids and solids (c) Either (d) None (d) All (d) C (d) (d) None (d) m-2sec1 (d) Self-interstitial (d) External surfaces

    (d) Presence of defects (d) None (d) None

    Satish V. Kailas/IISc, Bangalore

    M5/V1/June 04/1

    Material Science/Diffusion

    Multiple Choice Questions

    Answers:
    1. d 2. a 3. c 4. b 5. b 6. d 7. a 8. a 9. b 10. c 11. d 12. b

    Satish V. Kailas/IISc, Bangalore

    M5/V1/June 04/2

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