MSE 250 Final Exam Questions With Verified Answers

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MSE 250 Final Exam Questions With
Verified Answers


Why study the principles of materials science? They help us to __ new __ for use in __
applications.
a. develop; materials; engineering
b. discover; forms of matter and energy; scientific
c. develop; forms of atomic particles; scientific
d. develop; forms of materials energy; engineering

e. none of the above. - Answers✔a. develop; materials; engineering
A material's __ and __ affect the ___ of objects made of that material.
a. shape; processing; properties
b. structure; form; properties
c. structure; processing; consequence
d. structure; processing; properties

e. none of the above - Answers✔d. structure; processing; properties
The three major families of materials include __, __ and __.
a. materials; ceramics; polymers
b. metals; ceramics; glasses
c. metals; metalloids; polymers
d. metals; ceramics; polymers

e. metals; plastics; polymers - Answers✔d. metals; ceramics; polymers


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The electrical properties of metals include __ electrical __.
a. good; stiffness
b. poor; strength
c. poor; conductivity
d. good; conductivity

e. infinite; conductivity - Answers✔d. good; conductivity
What are the two kinds of particles in an atomic nucleus?
a. protons; neutrons
b. electrons; protons
c. protons; electrons
d. photons; neutrons

e. photons; protons - Answers✔a. protons; neutrons
The periodic table enables us to characterize trends in the following characteristics of the
elements __, __, __, __, and __.
a. atomic number, weight, size, electronegativity, valence
b. atomic conduction, weight, size, electromobility, valence
c. atomic number, gravity, size, electromobility, talents
d. atomic conduction, weight, size, electronegativity, valence

e. atomic resistance, gravity, size, electromobility, talents - Answers✔a. atomic number, weight,
size, electronegativity, valence
Engineers use the Periodic Table to understand how Solubility impacts __ of materials.
a. phase diagrams and microstructure
b. phases and diagrams
c. electronic structure
d. mechanical properties

e. magnetic properties - Answers✔a. phase diagrams and microstructure
The principal quantum number is commonly designated by the letters __ or the numbers __.
a. (s,p,d,f); (1,2,3,...)
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b. (K,L,M,N,O...); (1,2,3...n)
c. (K,L,M,N,O...); (0,1,2,3...n)
d. (s,p,d,f); (0,1,2,3,...)

e. (a,b,c,d); (1,2,3,...) - Answers✔b. (K,L,M,N,O...); (1,2,3...n)
Atomic-bonding related properties include __, __, and __.
a. melting point; elastic modulus; coefficient of thermal expansion
b. melting point; plastic modulus; coefficient of electrical expansion
c. freezing point; elastic modulus; coefficient of electrical expansion
d. melting point; plastic modulus; coefficient of thermal expansion

e. freezing point; plastic modulus; coefficient of thermal expansion - Answers✔a. melting point;
elastic modulus; coefficient of thermal expansion
The coefficient of thermal expansion of a material correlates with its atomic-bonding __ and __.
a. force well; potential curve
b. kinetic well; force curve
c. force well; kinetic curve
d. thermal well; thermal curve

e. potential well; force curve - Answers✔e. potential well; force curve
The higher the slope of the stress-strain curve, the __ the __ of the material.
a. lower; plasticity
b. lower; stiffness
c. higher; plasticity
d. higher; stiffness

e. higher; fatigue - Answers✔d. higher; stiffness
The coefficient of thermal expansion of E-glass is __ ppm/degree C.
a. 0.0054
b. 5.4
c. 540


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d. 54

e. 5400 - Answers✔d. 54
The three ways that atoms and molecules can arrange themselves results in __, __ or __
structures.
a. atomic; sub-atomic; molecular
b. atomic; amorphous; semicrystalline
c. crystalline; atomic; semicrystalline
d. crystalline; amorphous; atomic

e. crystalline; amorphous; semicrystalline - Answers✔e. crystalline; amorphous; semicrystalline
How many possible Bravais lattices are there?
a. 7
b. 14
c. 21
d. 28

e. 25 - Answers✔b. 14
A crystal structure is a 3-D __ composed of repeating __ such that each __ has an atom or
molecule associated with it.
a. crystal; unit cells; crystal point
b. structure; unit cells; structure point
c. lattice; structure cells; lattice point
d. lattice; crystal cells; lattice point

e. lattice; unit cells; lattice point - Answers✔e. lattice; unit cells; lattice point
The lattice constants that can be used to define any cell are the __ lengths __, and the __ angles
__.
a. two; (a,b); two; (alpha, beta)
b. four; (a,b,c,d); four; (alpha, beta, gamma, delta)
c. three; (a,b,c); three; (alpha, beta, gamma)
d. three; (u,v,w); three; (alpha, beta, gamma)

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