MSE 200 - Test 1 Questions With
Verified Answers
Bonding as a 'cloud of electrons' between two adjacent atoms best describes...
a. covalent bonding
b. ionic bonding
c. metallic bonding
d. all of the above - ANSWER metallic bonding
How many nearest neighbors does an atom have in a body-centered cubic (bcc)
structure?
a. 4
b. 6
c. 8
d. 12 - ANSWER 8
The shortest distance between atoms in a body-centered cubic (bcc) crystal is
in which direction...
a. <100>
b. <110>
c. <111>
d. <210> - ANSWER 111
An impurity atom forms...
a. a substitutional or interstitial point defect
b. an edge or screw dislocation
c. a vacancy
d. none of the above - ANSWER a substitutional or interstitial point defect
Which of the following structures do not contain close-packed planes?
a. face-centered cubic
b. hexagonal close packed
c. simple cubic
d. none of the above - ANSWER simple cubic
, The number of vacancies in a material...
a. increases linearly with increasing temperature
b. increases exponentially with increasing temperature
c. decreases linearly with increasing temperature
d. decreases exponentially with increasing temperature - ANSWER increases
exponentially with increasing temperature
A grain boundary is an example of a...
a. point defect
b. line defect
c. surface defect
d. none of the above - ANSWER surface defect
Two types of point defects are...
a. Schottky and Frenkel
b. FCC and BCC
c. Edge and screw
d. None of the above - ANSWER Schottky and Frenkel
Slip occurs by...
a. vacancy diffusion
b. interstitial diffusion
c. motion of dislocations
d. migration of grain boundaries - ANSWER motion of dislocations
Isotropic properties are exhibited by...
a. polycrystalline materials with random orientation of grains
b. polycrystalline materials with preferred orientation of grains
c. single crystals with any lattice orientation
d. single crystals with particular lattice orientation - ANSWER polycrystalline
materials with random orientation of grains
The units of flux J are...
a. number of atoms/area
b. number of atoms/(area.time)
c. concentration of atoms/area
d. concentration of atoms/(area.time) - ANSWER number of atoms/(area.time)
The rotational symmetry associated with a close packed hexagonal crystal
about the vertical (C-axis) axis is...
Verified Answers
Bonding as a 'cloud of electrons' between two adjacent atoms best describes...
a. covalent bonding
b. ionic bonding
c. metallic bonding
d. all of the above - ANSWER metallic bonding
How many nearest neighbors does an atom have in a body-centered cubic (bcc)
structure?
a. 4
b. 6
c. 8
d. 12 - ANSWER 8
The shortest distance between atoms in a body-centered cubic (bcc) crystal is
in which direction...
a. <100>
b. <110>
c. <111>
d. <210> - ANSWER 111
An impurity atom forms...
a. a substitutional or interstitial point defect
b. an edge or screw dislocation
c. a vacancy
d. none of the above - ANSWER a substitutional or interstitial point defect
Which of the following structures do not contain close-packed planes?
a. face-centered cubic
b. hexagonal close packed
c. simple cubic
d. none of the above - ANSWER simple cubic
, The number of vacancies in a material...
a. increases linearly with increasing temperature
b. increases exponentially with increasing temperature
c. decreases linearly with increasing temperature
d. decreases exponentially with increasing temperature - ANSWER increases
exponentially with increasing temperature
A grain boundary is an example of a...
a. point defect
b. line defect
c. surface defect
d. none of the above - ANSWER surface defect
Two types of point defects are...
a. Schottky and Frenkel
b. FCC and BCC
c. Edge and screw
d. None of the above - ANSWER Schottky and Frenkel
Slip occurs by...
a. vacancy diffusion
b. interstitial diffusion
c. motion of dislocations
d. migration of grain boundaries - ANSWER motion of dislocations
Isotropic properties are exhibited by...
a. polycrystalline materials with random orientation of grains
b. polycrystalline materials with preferred orientation of grains
c. single crystals with any lattice orientation
d. single crystals with particular lattice orientation - ANSWER polycrystalline
materials with random orientation of grains
The units of flux J are...
a. number of atoms/area
b. number of atoms/(area.time)
c. concentration of atoms/area
d. concentration of atoms/(area.time) - ANSWER number of atoms/(area.time)
The rotational symmetry associated with a close packed hexagonal crystal
about the vertical (C-axis) axis is...
