ME 3010 Test 1

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85shelbyc
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82019
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ME 3010 Test 1
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2011-04-26 22:28:02
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ME test exam
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Test 1 Study
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  1. In metallic bonding, the valence electrons of the metallic materials ___.

    A) are shared between adjacent atoms
    B) are given up by one atom ot another
    C) weak electrostatic attractions between atomic or molecular dipoles
    D) are not bound to any particular atom
    D) are not bound to any particular atom
    (this multiple choice question has been scrambled)
  2. ___ is the bonding that can be found in neon (Ne).

    A) Van der Waals
    B) Metallic
    C) Ionic
    D) Covalent
    A) Van der Waals
    (this multiple choice question has been scrambled)
  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.

    A) ordered
    B) substitutional
    C) interstitial
    D) vacancy
    B) substitutional
    (this multiple choice question has been scrambled)
  4. Plywood is an example of ___ material.

    A) ceramic
    B) metallic
    C) composite
    D) biomaterial
    C) composite
    (this multiple choice question has been scrambled)
  5. ___ is the primary bonding that can be found in polyvinyl chloride (PVC).

    A) Ionic
    B) Van der Waals
    C) Metallic
    D) Covalent
    D) Covalent
    (this multiple choice question has been scrambled)
  6. ___ provides magnifications up to approximately 2000x and is a relativiely low-cost instrument.

    A) SEM
    B) EDS
    C) X-Ray diffractometer
    D) Optical Microscope
    D) Optical Microscope
    (this multiple choice question has been scrambled)
  7. Which of the following molecular structures of polymers show the highest strength?

    A) network
    B) linear
    C) partially cross-linked
    D) branched
    A) network
    (this multiple choice question has been scrambled)
  8. Epoxy is an example of ___. They become permanently hard when heat is applied and do not soften upon subsequent heating.

    A) carbon nanotubes
    B) elastomers
    C) thermoplastics
    D) thermosets
    D) thermosets
    (this multiple choice question has been scrambled)
  9. Which of the following does not belong to the three types of primary interatomic bonding?

    A) Metallic
    B) Covalent
    C) Van der Waals
    D) Ionic
    C) Van der Waals
    (this multiple choice question has been scrambled)
  10. The modulus of elasticity is a measure of how ___ the material is.

    A) strong
    B) stiff
    C) ductile
    D) tough
    C) ductile
    (this multiple choice question has been scrambled)
  11. Microhardness testing was conducted on two cast irons. Both images were taken at 150x. Which material is stronger?

    A) Need to have the hardness values in order to compare
    B) Specimen #2
    C) Specimen #1
    D) They are the same
    B) Specimen #2
    (this multiple choice question has been scrambled)
  12. Polyethylene is classified as a ___ material.

    A) polymer
    B) ceramic
    C) metallic
    D) composite
    A) polymer
    (this multiple choice question has been scrambled)
  13. Tungsten Carbide (WC) is classified as a ___ material.

    A) ceramic
    B) metallic
    C) polymer
    D) composite
    A) ceramic
    (this multiple choice question has been scrambled)
  14. Which of the following techniques can be used to determine the crystal structures of crystalline materials?

    A) Scanning Electron Microscopy
    B) Energy-Dispersive Spectroscopy
    C) Optical Microscopy
    D) X-Ray Diffraction
    D) X-Ray Diffraction
    (this multiple choice question has been scrambled)
  15. The key phase for describing covalent bonding is ___.

    A) secondary bonding
    B) sharing electrons
    C) free electrons
    D) transferring electrons
    B) sharing electrons
    (this multiple choice question has been scrambled)
  16. The number of atoms in a FCC unit cell is ___.

    A) 8
    B) 4
    C) 6
    D) 2
    B) 4
    (this multiple choice question has been scrambled)
  17. If the micron bar in the following micrograph is 15 mm, what is the magnification of the image?

    A) 15,000
    B) 1,000
    C) 15
    D) 150
    A) 15,000
    (this multiple choice question has been scrambled)
  18. Which of the following is not a step involved in the metallographic sample preparation?

    A) Etching using the right etchant
    B) Grinding/Polishing
    C) Vicker's Hardness Evaluation
    D) Mounting
    C) Vicker's Hardness Evaluation
    (this multiple choice question has been scrambled)
  19. Which of the statements regarding Van der Waals bonding is not correct?

    A) Van der Waals bonding is an example of secondary bonding because it does not contribute to materials properties.
    B) In many plastic materials (e.g., Teflon, PVC), Van der Waals forces provide an extra binding force between the chains of these polymers.
    C) Van der Waals bonding is essentially a weak electrostatic attraction between atomic or molecular dipoles.
    D) Van der Waals bonding can be found in inert gases.
    A) Van der Waals bonding is an example of secondary bonding because it does not contribute ot materials properties
    (this multiple choice question has been scrambled)
  20. The hardness value of which hardness test is based on the depth of penetration rather than the indented area?

    A) Brinell
    B) Vickers
    C) Rockwell
    D) Knoop
    C) Rockwell
    (this multiple choice question has been scrambled)
  21. Ordinarily, when the strength of a metal is cited for design purposes, the ___ is used.

    A) tensile strength
    B) 0.002% offset yield strength
    C) ultimate tensile strength
    D) 0.002 offset yield strength
    D) 0.002 offset yield strength
    (this multiple choice question has been scrambled)
  22. Which of the following is an example of an "alloy"?

    A) Titanium
    B) Tin
    C) Nickel
    D) Bronze
    D) Bronze
    (this multiple choice question has been scrambled)
  23. The nucleus of an atom contains?

    A) both protons and neutrons
    B) neutrons
    C) protons
    D) electrons
    A) both protons and neutrons
    (this multiple choice question has been scrambled)
  24. Which crystal structure does the following unit cell drawing represent?

    A) Hexagonal Close-Packed (HCP)
    B) Body-Centered Cubic (BCC)
    C) Face-Centered Cubic (FCC)
    D) Body-Centered Tetragonal (BCT)
    A) Hexagonal Close-Packed (HCP)
    (this multiple choice question has been scrambled)
  25. Which of the following hardness tests is a microhardness test?

    A) Brinell
    B) Nanoindentation
    C) Rockwell
    D) Vickers
    D) Vickers
    (this multiple choice question has been scrambled)
  26. Which of the following is a linear defect?

    A) grain boundary
    B) interstitial defect
    C) dislocation
    D) substitutional defect
    C) dislocation
    (this multiple choice question has been scrambled)
  27. A spheroidite steel with the following microstructure is a ___ composite.

    A) laminar
    B) fiber-reinforced
    C) particle-reinforced
    D) polymer-matrix
    C) particle-reinforced
    (this multiple choice question has been scrambled)
  28. 1s22s22p63s23p63d74s2 is the electron configuration of the material of ___.

    A) alkaline earth metal
    B) transition metal
    C) alkali metal
    D) halogen
    B) transition metal
    (this multiple choice question has been scrambled)
  29. A more recent and extremely useful investigative tool for microstructural observation utilizing electron beams is the ___.

    A) X-Ray diffraction
    B) Vickers hardness testing
    C) optical microscope
    D) Scanning electron microscope
    D) Scanning electron microscope
    (this multiple choice question has been scrambled)
  30. Atomic mass is the mass of ___ in the nucleus of an atom.

    A) protons
    B) protons + neutrons
    C) valence electrons
    D) protons + electrons
    B) protons + neutrons
    (this multiple choice question has been scrambled)

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