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ME 3010 Test 1
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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) are not bound to any particular atom
D) weak electrostatic attractions between atomic or molecular dipoles
C) are not bound to any particular atom
___ is the bonding that can be found in neon (Ne).
A) Covalent
B) Metallic
C) Ionic
D) Van der Waals
D) Van der Waals
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) vacancy
B) ordered
C) substitutional
D) interstitial
C) substitutional
Plywood is an example of ___ material.
A) ceramic
B) composite
C) biomaterial
D) metallic
B) composite
___ is the primary bonding that can be found in polyvinyl chloride (PVC).
A) Metallic
B) Ionic
C) Van der Waals
D) Covalent
D) Covalent
___ provides magnifications up to approximately 2000x and is a relativiely low-cost instrument.
A) X-Ray diffractometer
B) Optical Microscope
C) EDS
D) SEM
B) Optical Microscope
Which of the following molecular structures of polymers show the highest strength?
A) branched
B) network
C) linear
D) partially cross-linked
B) network
Epoxy is an example of ___. They become permanently hard when heat is applied and do not soften upon subsequent heating.
A) elastomers
B) thermoplastics
C) thermosets
D) carbon nanotubes
C) thermosets
Which of the following does not belong to the three types of primary interatomic bonding?
A) Van der Waals
B) Ionic
C) Covalent
D) Metallic
A) Van der Waals
The modulus of elasticity is a measure of how ___ the material is.
A) tough
B) strong
C) stiff
D) ductile
D) ductile
Microhardness testing was conducted on two cast irons. Both images were taken at 150x. Which material is stronger?
A) Specimen #1
B) Specimen #2
C) Need to have the hardness values in order to compare
D) They are the same
B) Specimen #2
Polyethylene is classified as a ___ material.
A) polymer
B) metallic
C) composite
D) ceramic
A) polymer
Tungsten Carbide (WC) is classified as a ___ material.
A) polymer
B) composite
C) metallic
D) ceramic
D) ceramic
Which of the following techniques can be used to determine the crystal structures of crystalline materials?
A) Optical Microscopy
B) Energy-Dispersive Spectroscopy
C) X-Ray Diffraction
D) Scanning Electron Microscopy
C) X-Ray Diffraction
The key phase for describing covalent bonding is ___.
A) sharing electrons
B) secondary bonding
C) free electrons
D) transferring electrons
A) sharing electrons
The number of atoms in a FCC unit cell is ___.
A) 4
B) 2
C) 6
D) 8
A) 4
If the micron bar in the following micrograph is 15 mm, what is the magnification of the image?
A) 150
B) 15
C) 1,000
D) 15,000
D) 15,000
Which of the following is not a step involved in the metallographic sample preparation?
A) Etching using the right etchant
B) Mounting
C) Grinding/Polishing
D) Vicker's Hardness Evaluation
D) Vicker's Hardness Evaluation
Which of the statements regarding Van der Waals bonding is not correct?
A) In many plastic materials (e.g., Teflon, PVC), Van der Waals forces provide an extra binding force between the chains of these polymers.
B) Van der Waals bonding can be found in inert gases.
C) Van der Waals bonding is an example of secondary bonding because it does not contribute to materials properties.
D) Van der Waals bonding is essentially a weak electrostatic attraction between atomic or molecular dipoles.
C) Van der Waals bonding is an example of secondary bonding because it does not contribute ot materials properties
The hardness value of which hardness test is based on the depth of penetration rather than the indented area?
A) Rockwell
B) Brinell
C) Vickers
D) Knoop
A) Rockwell
Ordinarily, when the strength of a metal is cited for design purposes, the ___ is used.
A) 0.002% offset yield strength
B) 0.002 offset yield strength
C) tensile strength
D) ultimate tensile strength
B) 0.002 offset yield strength
Which of the following is an example of an "alloy"?
A) Nickel
B) Bronze
C) Tin
D) Titanium
B) Bronze
The nucleus of an atom contains?
A) protons
B) electrons
C) neutrons
D) both protons and neutrons
D) both protons and neutrons
Which crystal structure does the following unit cell drawing represent?
A) Body-Centered Cubic (BCC)
B) Face-Centered Cubic (FCC)
C) Body-Centered Tetragonal (BCT)
D) Hexagonal Close-Packed (HCP)
D) Hexagonal Close-Packed (HCP)
Which of the following hardness tests is a microhardness test?
A) Nanoindentation
B) Vickers
C) Brinell
D) Rockwell
B) Vickers
Which of the following is a linear defect?
A) interstitial defect
B) substitutional defect
C) dislocation
D) grain boundary
C) dislocation
A spheroidite steel with the following microstructure is a ___ composite.
A) particle-reinforced
B) fiber-reinforced
C) polymer-matrix
D) laminar
A) particle-reinforced
1s
2
2s
2
2p
6
3s
2
3p
6
3d
7
4s
2
is the electron configuration of the material of ___.
A) alkali metal
B) halogen
C) transition metal
D) alkaline earth metal
C) transition metal
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
Atomic mass is the mass of ___ in the nucleus of an atom.
A) protons + electrons
B) protons + neutrons
C) protons
D) valence electrons
B) protons + neutrons
Author
85shelbyc
ID
82019
Card Set
ME 3010 Test 1
Description
Test 1 Study
Updated
2011-04-27T02:28:02Z
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