MEGR 3161 QUIZ
materials science and engineering MSE is about
a how to make a specific component
b the relationship between microstrcuture and the properties of materials, and based on
this relationship how to process and material for desired properties and performance
c how to process a material for desired properties - Correct Answers -B the relationship
between microstructure and the properties of materials, and based on this relationship
how the process and material for desired properties and performance
The key components of Materials Science and Engineering include?
a processing-structure-properties-performance
b composition, processing, microstructure, mechanical properties
c structure and properties of materials - Correct Answers -a processing-structure-
properties-performance
For structural applications of a material, the most important properties of concern are?
a mechanical properties such as electrical modulus yield strength, tensile strength, etc
b physical properties such as electric conductivity, thermal conductivity, etc.
c chemical properties such as corrosion resistance. - Correct Answers -a mechanical
properties such as electrical modulus yield strength, tensile strength, etc
The primary types of materials of technological importance are the following
a metals, ceramics, and polymers
b metals, biomaterials, semiconductors, composites, etc - Correct Answers -a metals,
ceramics, and polymers
there is only one classification scheme for materials
true/false - Correct Answers -false
The electron in an atom can have any amount of energy
true/false - Correct Answers -false
The electron of a hydrogen atom can only stay in the K-shell (n=1)
true/false - Correct Answers -false
Choose the correct answer for NaCl
, a Na is electropositive
B Cl is electropositive - Correct Answers -a Na is electropositive
For metals, the larger the bonding energy (Eo)
a the lower the melting point
b the higher the melting point - Correct Answers -b the higher the melting point
At equilibrium distance between atom A and B for the compound AB
a the interatomic force is the lowest and the potential energy is zero
b the interatomic potential energy is the lowest and the interatomic force is zero -
Correct Answers -b the interatomic potential energy is the lowest and the interatomic
force is zero
The three primary bonds in materials are
a ionic covalent and metallic
b ionic covalent and vanderwasals
c vanderwaals covalent and metallic - Correct Answers -a ionic covalent and metallic
metallic bonds are directional
true/false - Correct Answers -false
covalent bonds are
a directional
b nondirectional - Correct Answers -directional
for metals, the larger the bonding energy (Eo)
a the lower the melting point
b the higher the melting point - Correct Answers -b the higher the melting point
For two different elements to form a covalent compound, their electronegativities must
be
a similar
b very different. - Correct Answers -a similar
the properties of a single cyrstal are usual
a isotropic
b anisotropic - Correct Answers -b anisotropic
if we do X-ray diffraction on an amorphous materials, we have
a sharp and well defined peaks
b broad bumps - Correct Answers -b broad bumps
The most common lattice structure for metals are
a BCC FCC HCP
b Simple Cubic BCC FCC HCP
c Tetragonal BCC FCC HCP - Correct Answers -a BCC FCC HCP
materials science and engineering MSE is about
a how to make a specific component
b the relationship between microstrcuture and the properties of materials, and based on
this relationship how to process and material for desired properties and performance
c how to process a material for desired properties - Correct Answers -B the relationship
between microstructure and the properties of materials, and based on this relationship
how the process and material for desired properties and performance
The key components of Materials Science and Engineering include?
a processing-structure-properties-performance
b composition, processing, microstructure, mechanical properties
c structure and properties of materials - Correct Answers -a processing-structure-
properties-performance
For structural applications of a material, the most important properties of concern are?
a mechanical properties such as electrical modulus yield strength, tensile strength, etc
b physical properties such as electric conductivity, thermal conductivity, etc.
c chemical properties such as corrosion resistance. - Correct Answers -a mechanical
properties such as electrical modulus yield strength, tensile strength, etc
The primary types of materials of technological importance are the following
a metals, ceramics, and polymers
b metals, biomaterials, semiconductors, composites, etc - Correct Answers -a metals,
ceramics, and polymers
there is only one classification scheme for materials
true/false - Correct Answers -false
The electron in an atom can have any amount of energy
true/false - Correct Answers -false
The electron of a hydrogen atom can only stay in the K-shell (n=1)
true/false - Correct Answers -false
Choose the correct answer for NaCl
, a Na is electropositive
B Cl is electropositive - Correct Answers -a Na is electropositive
For metals, the larger the bonding energy (Eo)
a the lower the melting point
b the higher the melting point - Correct Answers -b the higher the melting point
At equilibrium distance between atom A and B for the compound AB
a the interatomic force is the lowest and the potential energy is zero
b the interatomic potential energy is the lowest and the interatomic force is zero -
Correct Answers -b the interatomic potential energy is the lowest and the interatomic
force is zero
The three primary bonds in materials are
a ionic covalent and metallic
b ionic covalent and vanderwasals
c vanderwaals covalent and metallic - Correct Answers -a ionic covalent and metallic
metallic bonds are directional
true/false - Correct Answers -false
covalent bonds are
a directional
b nondirectional - Correct Answers -directional
for metals, the larger the bonding energy (Eo)
a the lower the melting point
b the higher the melting point - Correct Answers -b the higher the melting point
For two different elements to form a covalent compound, their electronegativities must
be
a similar
b very different. - Correct Answers -a similar
the properties of a single cyrstal are usual
a isotropic
b anisotropic - Correct Answers -b anisotropic
if we do X-ray diffraction on an amorphous materials, we have
a sharp and well defined peaks
b broad bumps - Correct Answers -b broad bumps
The most common lattice structure for metals are
a BCC FCC HCP
b Simple Cubic BCC FCC HCP
c Tetragonal BCC FCC HCP - Correct Answers -a BCC FCC HCP
