MTE 271 EXAM QUESTIONS WELL ANSWERED CORRECTLY LATEST UPDATE 2026
Metals and Alloys - Answers These materials have good electrical and thermal conductivities,
relatively high strength, high stiffness, ductility or formability, and shock resistance. These materials
are particularly useful for structural or load bearing applications
Ceramic - Answers This material is generally an inorganic nonmetallic material, does not conduct heat
well and must be heated to very high temperatures before melting. Also this material is very strong
and hard, but also very brittle
Polymers - Answers These materials are typically organic materials, are typically good electrical and
thermal insulators, and generally have very good strength to weight ratios. They are generally not
suitable for high temperature applications
False - Answers An engineer is designing a plane. There is a choice of aluminum or a composite
material. The composite weights half that of aluminum. Choosing the composite will not affect fuel
costs. True/False?
Weight/Volume - Answers Density is a ratio of
Quantum - Answers The Pauli Exclusion Principle states that within each atom, no two electrons can
have the same four __________ numbers
Primary Bonds - Answers Metallic, Covalent, and ionic bonds are known as__________?
The atomic number of an atom is the number of protons per atom - Answers What is the atomic
number of an atom?
False - Answers The valence of an atom is the number of electrons in an atom that do not participate
in bonding in chemical reactions. True/False?
Nucleus - Answers Most of the mass of the atom is contained within the __________
electrical neutrality - Answers Crystal structures with ions must have _________
(number of atoms/cell)((4π/3)(radius on atom)^3) - Answers The equation for determining the
packing factor of a cell with only one type of atom is _______________.
Coordination Number - Answers The _________ is the number of atoms touch a particular atom, or
the number of nearest neighbors for that particular atom
. simple cubic, face-centered cubic, body-centered cubic - Answers Which of the following choices
includes the names for all three cubic crystal Bravais lattices.
allotropic - Answers The term ________ refers to pure elements with more than one crystal structure
polymorphic - Answers The term ________ is used for compounds with more than one crystal
structure
covalent bonds - Answers Bonds that are formed by the sharing of valence electrons among two or
more atoms are ___________?
cation - Answers In ionic bonds the atom that contributes an electron and had a positive charge as a
result is called _________
anion - Answers The atom in ionic bonding that accepts an electron and has a negative charge as a
result is called the _______
lattice points - Answers A lattice is a collection of points named ________, which are arranged in
periodic pattern so the surroundings of each point in the lattice are identical
False - Answers The ratio of sizes of the ionic radii of anions and cations in a cell has no influence on
the manner of packing of that cell. True/False
high/high - Answers Materials with high binding energy have also have __________ strength and
__________ melting temperature.
Interstitial sites - Answers In all crystal structures, there are small holes between the usual atoms into
which smaller atoms may be placed. These locations are called __________
True - Answers Covalently bonded materials frequently have complex structures in order to satisfy
the directional restraints imposed by the bonding. True/False
Allotropic - Answers The term ________ refers to pure elements with more than one crystal structure
Polymorphic - Answers The term ________ is used for compounds with more than one crystal
structure
False - Answers The ratio of sizes of the ionic radii of anions and cations in a cell has no influence on
the manner of packing of that cell. True/False
Interstitial sites - Answers In all crystal structures, there are small holes between the usual atoms into
which smaller atoms may be placed. These locations are called __________.
Face-centered cubic - Answers The fluorite structure is ________ Bravais lattice
Metals and Alloys - Answers These materials have good electrical and thermal conductivities,
relatively high strength, high stiffness, ductility or formability, and shock resistance. These materials
are particularly useful for structural or load bearing applications
Ceramic - Answers This material is generally an inorganic nonmetallic material, does not conduct heat
well and must be heated to very high temperatures before melting. Also this material is very strong
and hard, but also very brittle
Polymers - Answers These materials are typically organic materials, are typically good electrical and
thermal insulators, and generally have very good strength to weight ratios. They are generally not
suitable for high temperature applications
False - Answers An engineer is designing a plane. There is a choice of aluminum or a composite
material. The composite weights half that of aluminum. Choosing the composite will not affect fuel
costs. True/False?
Weight/Volume - Answers Density is a ratio of
Quantum - Answers The Pauli Exclusion Principle states that within each atom, no two electrons can
have the same four __________ numbers
Primary Bonds - Answers Metallic, Covalent, and ionic bonds are known as__________?
The atomic number of an atom is the number of protons per atom - Answers What is the atomic
number of an atom?
False - Answers The valence of an atom is the number of electrons in an atom that do not participate
in bonding in chemical reactions. True/False?
Nucleus - Answers Most of the mass of the atom is contained within the __________
electrical neutrality - Answers Crystal structures with ions must have _________
(number of atoms/cell)((4π/3)(radius on atom)^3) - Answers The equation for determining the
packing factor of a cell with only one type of atom is _______________.
Coordination Number - Answers The _________ is the number of atoms touch a particular atom, or
the number of nearest neighbors for that particular atom
. simple cubic, face-centered cubic, body-centered cubic - Answers Which of the following choices
includes the names for all three cubic crystal Bravais lattices.
allotropic - Answers The term ________ refers to pure elements with more than one crystal structure
polymorphic - Answers The term ________ is used for compounds with more than one crystal
structure
covalent bonds - Answers Bonds that are formed by the sharing of valence electrons among two or
more atoms are ___________?
cation - Answers In ionic bonds the atom that contributes an electron and had a positive charge as a
result is called _________
anion - Answers The atom in ionic bonding that accepts an electron and has a negative charge as a
result is called the _______
lattice points - Answers A lattice is a collection of points named ________, which are arranged in
periodic pattern so the surroundings of each point in the lattice are identical
False - Answers The ratio of sizes of the ionic radii of anions and cations in a cell has no influence on
the manner of packing of that cell. True/False
high/high - Answers Materials with high binding energy have also have __________ strength and
__________ melting temperature.
Interstitial sites - Answers In all crystal structures, there are small holes between the usual atoms into
which smaller atoms may be placed. These locations are called __________
True - Answers Covalently bonded materials frequently have complex structures in order to satisfy
the directional restraints imposed by the bonding. True/False
Allotropic - Answers The term ________ refers to pure elements with more than one crystal structure
Polymorphic - Answers The term ________ is used for compounds with more than one crystal
structure
False - Answers The ratio of sizes of the ionic radii of anions and cations in a cell has no influence on
the manner of packing of that cell. True/False
Interstitial sites - Answers In all crystal structures, there are small holes between the usual atoms into
which smaller atoms may be placed. These locations are called __________.
Face-centered cubic - Answers The fluorite structure is ________ Bravais lattice
