ME 3010 Test 1

  1. In metallic bonding, the valence electrons of the metallic materials ___.

    C) are not bound to any particular atom
  2. ___ is the bonding that can be found in neon (Ne).

    C) Van der Waals
  3. An example of a ___ solid solution is found for Cu-25wt%Ni alloy? The atomic radii of Cu and Ni are 1.28 and 1.25A, respectively.

    D) substitutional
  4. Plywood is an example of ___ material.

    B) composite
  5. ___ is the primary bonding that can be found in polyvinyl chloride (PVC).

    A) Covalent
  6. ___ provides magnifications up to approximately 2000x and is a relativiely low-cost instrument.

    C) Optical Microscope
  7. Which of the following molecular structures of polymers show the highest strength?

    A) network
  8. Epoxy is an example of ___. They become permanently hard when heat is applied and do not soften upon subsequent heating.

    C) thermosets
  9. Which of the following does not belong to the three types of primary interatomic bonding?

    A) Van der Waals
  10. The modulus of elasticity is a measure of how ___ the material is.

    D) ductile
  11. Microhardness testing was conducted on two cast irons. Both images were taken at 150x. Which material is stronger?

    D) Specimen #2
  12. Polyethylene is classified as a ___ material.

    A) polymer
  13. Tungsten Carbide (WC) is classified as a ___ material.

    A) ceramic
  14. Which of the following techniques can be used to determine the crystal structures of crystalline materials?

    C) X-Ray Diffraction
  15. The key phase for describing covalent bonding is ___.

    B) sharing electrons
  16. The number of atoms in a FCC unit cell is ___.

    A) 4
  17. If the micron bar in the following micrograph is 15 mm, what is the magnification of the image?

    B) 15,000
  18. Which of the following is not a step involved in the metallographic sample preparation?

    C) Vicker's Hardness Evaluation
  19. Which of the statements regarding Van der Waals bonding is not correct?

    C) Van der Waals bonding is an example of secondary bonding because it does not contribute ot materials properties
  20. The hardness value of which hardness test is based on the depth of penetration rather than the indented area?

    A) Rockwell
  21. Ordinarily, when the strength of a metal is cited for design purposes, the ___ is used.

    A) 0.002 offset yield strength
  22. Which of the following is an example of an "alloy"?

    A) Bronze
  23. The nucleus of an atom contains?

    D) both protons and neutrons
  24. Which crystal structure does the following unit cell drawing represent?

    A) Hexagonal Close-Packed (HCP)
  25. Which of the following hardness tests is a microhardness test?

    D) Vickers
  26. Which of the following is a linear defect?

    D) dislocation
  27. A spheroidite steel with the following microstructure is a ___ composite.

    C) particle-reinforced
  28. 1s22s22p63s23p63d74s2 is the electron configuration of the material of ___.

    D) transition metal
  29. A more recent and extremely useful investigative tool for microstructural observation utilizing electron beams is the ___.

    C) Scanning electron microscope
  30. Atomic mass is the mass of ___ in the nucleus of an atom.

    D) protons + neutrons
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ME 3010 Test 1
Test 1 Study