MATE EXAM 1

what type of material sub-classification would a piezoelectric material fall into?

smart materials

Match the material classification/sub-classification to the corresponding example

• titanium

• NaCl

• carbon fiber reinforced plate

• artificial bone

• magnetic recording media

• shape memory alloy

• metals - titanium

• ceramics - NaCl

• composites - carbon fiber reinforced plate

• bio-materials - artificial bone

• polymers - magnetic recording media

• smart materials - shape memory alloy

Match order prefixes for A, Mm, nm, Gm

A - 1×10^-10

Mm - 1×10^6

nm - 1×10^-9

Gm - 1×10^9

What is different about the angstrom when compared to other SI prefixes?

SI prefixes can be used for any unit, but angstroms are specific to meters.

order SI prefixes from largest to smallest:

pico, giga, micro, milli, mega

pico<micro<milli<mega<giga

list elements from largest to smallest: copper, barium, molybdenum, sulfur

barium>molybdenum>copper>sulfur

list elements based on atomic radius from smallest to largest: strontium, cobalt, aluminum, chlorine

strontium>cobalt>aluminum>chlorine

name the bonding using electronegative of:

• C-C

• Na-Br

• Mn-Co

• N-O

• C-C : covalent

• Na-Br: ionic

• Mn-Co: metallic

• N-O: covalent

name the bonding using electronegative of:

• Ni-Ni

• K-F

• C-Si

• Fe-Ni

• K-Cl

• Ni-Ni : metallic

• K-F : ionic

• C-Si : covalent

• Fe-Ni : metallic

• K-Cl : ionic

Which has the highest melting point?

A

Which has the lowest melting point?

D

Which has the shortest equilibrium bond length

B

Which has the largest equilibrium length?

C

what type of bond is both directional and dictated by the shapes of orbitals?

covalent

what bond type is both non-directional and limited by like charge repulsion?

ionic

which bond type is non-directional and leads to highly dense packing?

metallic

what specific secondary bond is weakest, and due to temporary electron clod asymmetry in non-polar atoms and molecules?

induced dipole bonds

Which specific type of secondary bonding occurs between to polar molecules, and is especially effective when hydrogen is involved?

permanent dipole bonds

what type of atomic packing is this?

amorphous

what type of atomic packing is this?

polycrystalline

how many crystal systems and Bravais lattices are there?

7 crystal systems and 14 Bravais lattices

what is the miller indices?

[-1 1 -1]

what are the miller indices?

[0 1 1]

what are the miller indices?

[-1 1 0]

what are the miller indices?

[1 2 -2]

what are the miller indices?

[0 -1 1]

what are the miller indices?

(1 1 1)

what are the miller indices?

(1 -1 2)

what are the miller indices?

(-1 1 -1)

what are the miller indices?

(-1 -1 1)

what are the miller indices?

(1 0 1)

what are the miller indices?

(1 1 0)

how many atoms in metallic BCC unit cell?

2

how many atoms in metallic FCC unit cell?

4

how many atoms in non-extended metallic HCP unit cell?

2

What metallic structure(s) have APF of 0.74

FCC & HCP

match defect with proper dimensionaility

• crack

• phase-boundary

• mixed dislocation

• vacancy

• crack - 3D

• phase-boundary - 2D

• mixed dislocation - 1D

• vacancy - 0D

match each to proper dimensionality:

• screw dislocation

• interstitial vacancy

• twin boundary

• void

• screw dislocation - 1D

• interstitial vacancy - 0D

• twin boundary - 2D

• void - 3D

match defect to proper dimensionalitiy:

• pore

• edge dislocation

• substitutional vacancy

• grain boundary

• pore - 3D

• edge dislocation - 1D

• substitutional vacancy - 0D

• grain boundary - 2D

You add some salt to a glass of water and all the salt is dissolved into a solution. There are ___ phase(s) and ___ component(s) in this solution.

1, 2

which of the stress strain curves shows highest yield stress?

D

which of the stress strain curves shows highest toughness?

A

which of the stress strain curves shows lowest toughness?

C

which of the stress strain curves shows highest elastic modulus?

D