Materials Science #1 Fundamentals

Consider the schematic nanostructure depicted below. Which of the following statements is TRUE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown

Each of the phases features a very similar concentration of vacancies.

Consider the schematic nanostructure depicted below. Which of the following statements is TRUE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown.

The microstructure features exactly two components and two different phases.

Which class of material is generally associated with the highest density values at room temperature?

Metals

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of material structure?

Crystalline

What are the Miller indices for the plane shown below?

(243-)

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of material structure?

crystalline

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of a material property?

density

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

021

_________ bonds are responsible for binding atoms together within a molecule of propane, whereas ________ bonds bind separate propane molecules together in a condensed state (liquid or crystal).

Covalent, Van der Waals

Consider the schematic nanostructure depicted below. Which of the following statements is FALSE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown.

The microstructure features exactly two components and two different phases.

What are the Miller-Bravais indices for the plane shown below?

(0001¯)

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

 

012

Which structure is most consistent with a polycrystalline structure?

(d)

Which crystal system(s) listed below has (have) the following interaxial angle relationship?α≠β≠γ≠90∘

 

Triclinic

Which structure is most consistent with an amorphous structure?

(c)

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of material structure?

Single-phase

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of a material property?

Melting Temperature

In metals, there are significantly more vacancies than self-interstitials. true or false?

True

The solute is an element or compound present in the greatest amount. true or false?

false

Materials Science and engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing.

which of the following is the best example of material processing?

Casting

is it possible to produce a perfect crystalline solid that does NOT contain any vacancies? true or false?

False

Consider the schematic nanostructure depicted below. Which of the following statements is FALSE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown.

Both of the phases present features interstitial impurities

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

1¯1¯1¯

What are the Miller indices for the plane shown below?

 

(403¯)

What are the Miller indices for the plane shown below?

(010)

Which crystal system(s) listed below has (have) the following interaxial angle relationship?α=γ=90∘≠β

Monoclinic

Ideally speaking, bonds tend to form between two particles such that they are separated by a distance where _______ net force is exerted on them, and their overall energy is _________.

 

zero, minimized

Which crystal system listed below has the following relationship for the unit cell edge lengths? a=b

Hexagonal

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

 

SC {100}

Which crystal system(s) listed below has the following relationship for the unit cell edge lengths? a≠b

Orthorhombic

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing.

Which of the following is the best example of material processing?

Annealing

Match the electron structure below with the element type it represents.1s22s2sp63s23p64s1

Alkali metal

What are the Miller indices for the plane shown below?

 

(11¯0)

Which class of material is generally considered to be the weakest at room temperature, offering the lowest elastic moduli and tensile strengths?

Polymers

Rhodium has an atomic radius of 0.1345 nm, a density of 12.41 g/cm3 and an atomic weight of 102.91 g/mol. What is rhodium's crystal structure?

 

FCC

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of a material property?

 

Elastic Modulus

Which crystal system(s) listed below has (have) the following interaxial angle relationship?α=β=γ≠90∘

Rhombohedral

What are the Miller indices for the plane shown below?

(012)

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

 

01¯1

Which of the following materials may form crystalline solids?

All of these;

Polymers

Ceramics

Metals

By how many of powers of ten does density vary across all material classes (metals, ceramics, polymers, and composites)?

2

Which crystal system(s) listed below has (have) the following relationship for the unit cell edge lengths? a=b≠c

I. Both B and G

Rhombohedral

Tetragonal

The atomic number of an electrically neutral atom is equal to the number of:

protons

Which structure is most consistent with a glassy structure?

(b)

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

FCC {111}

Which of the following materials/microstructures would be expected to be most similar to a single crystal in terms of structure and properties? Assume the same volume for all options and that grain boundaries are the only crystalline defects present.

Textured polycrystal with about 10,000 grains

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

SC {111}

What are the Miller indices for the plane shown below?

(433¯)

What are the Miller indices for the plane shown below?

 

(110)

The nucleus of an atom contains which of the following?

E. Both A and C

Protons

Neutrons

The atomic mass of an atom may be expressed as the sum of the masses of

Protons and neutrons

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

16¯3¯

The drawing below represents the unit cell for which crystal structure?

 

Face-centered cubic

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

 

2¯10

Two metal specimens, A and B, have ASTM grain size numbers of 3 and 8, respectively. Which specimen has the larger grain size?

Grain sizeA>Grain sizeB

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

4¯30

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

 

120

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

 

SC {110}

_________ bonds are the only primary bonds that are directionally dependent.

 

Covalent

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

BCC {110}

The surface energy of a single crystal depends on its crystallographic orientation with respect to the surface. True or False?

true

What are the Miller indices for the plane shown below?

(103)

The nucleus of an atom contains

Protons

Which of the following is a linear defect(s)?

A screw dislocation

What are the Miller indices for the plane shown below?

(12¯3)

The properties of noncrystalline materials are anisotropic. True or false

False

What are the Miller indices for the plane shown below?

(22¯3)

What is the maximum number of electrons that an M shell may contain?

 

18

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

 

110

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

111¯

When all the electrons in an atom occupy the lowest possible energy states, the atom is said to be in its:

ground state

Which crystal system(s) listed below has (have) the following interaxial angle relationship?α=β=γ=90∘

G. A, B, and E

Cubic, Tetragonal, Orthorhombic

Which structure is most consistent with a non-crystalline structure?

(d)

Which crystal system(s) listed below has (have) the following interaxial angle relationship? α=β=90∘,γ=120∘

Hexagonal

Which crystal system listed below has the following interaxial angle relationship? α=β=γ=90∘

Cubic

Consider the schematic nanostructure depicted below. Which of the following statements is FALSE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown.

Two grain boundaries are depicted.

What type(s) of electron subshell(s) does an L shell contain?

 

s and p

Materials whose constituent particles are bound by which type of are generally expected to have the lowest melting temperatures?

Van der Waals

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

 

FCC {100}

Which crystal system listed below has the following relationship for the unit cell edge lengths? a=b=c

 

Rhombohedral

What is the predominant type of bonding for titanium (Ti)?

 

Metallic

Consider the schematic nanostructure depicted below. Which of the following statements is TRUE regarding this schematic structure? Do not extrapolate the field of view. Consider only what you are shown.

One phase boundary is depicted.

_______ bonding is similar to ionic bonding, except there are no high-electronegativity atoms present to accept any electrons that the present atoms are willing to donate.

Metallic

Of the options provided, what is the crystal structure-crystallographic plane combination represented by the atomic arrangement below?

FCC {110}

By how many orders of magnitude (powers of ten, approximately) does density vary for metals?

1.3

Materials Science and Engineering is the study of material behavior & performance and how this is simultaneously related to structure, properties, and processing. Which of the following is the best example of material processing?

 

Extrusion