MSE 250 NEW FINAL EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED
type of bonding in metals - ANSWER metallic
arrangement of metals - ANSWER crystalline arrangement (orderly)
other characteristics of metals - ANSWER strong, stiff, ductile, resistant to fracture
high thermal and electrical conductivity
kind of bonding in ceramics - ANSWER ionic
characteristics of ceramics - ANSWER strong stiff BUT brittle
insulating
often chemically inert (nonreactive)
kind of bonding in polymers - ANSWER covalent bonding with a carbon chain backbone
characteristics of polymers - ANSWER soft ductile low strength low density
insulating
amorphous arrangement (non-orderly)
what five things can a tensile test measure (SSDTH) - ANSWER strength stiffness
ductility toughness and hardness
TRUE stress and strain is dependent on what? - ANSWER geometry
, Stress is represented by what variable and is on which axis of a stress strain curve? -
ANSWER sigma and y-axis and in MPa
strain is represented by what variable and is on which axis of a stress strain curve? -
ANSWER cursive e thing and x axis
elastic deformation is - ANSWER reversible
plastic deformation is - ANSWER permanent
FCC characteristics (atoms/cell and coordination #) - ANSWER # atoms/cell=4
coordination #=12
SC (simple cubic) characteristics (atoms/cell and coordination #) - ANSWER #
atoms/cell=1
coordination #=6
BCC characteristics (atoms/cell and coordination #) - ANSWER # atoms/cell=2
coordination #=8
substitutional impurity - ANSWER usual lattice sites, same size atoms and crystal
structure
interstitial impurity - ANSWER sits between usual lattice sits, atoms must be smaller that
host atoms
covalent bond difference in electronegativity - ANSWER large
100% VERIFIED
type of bonding in metals - ANSWER metallic
arrangement of metals - ANSWER crystalline arrangement (orderly)
other characteristics of metals - ANSWER strong, stiff, ductile, resistant to fracture
high thermal and electrical conductivity
kind of bonding in ceramics - ANSWER ionic
characteristics of ceramics - ANSWER strong stiff BUT brittle
insulating
often chemically inert (nonreactive)
kind of bonding in polymers - ANSWER covalent bonding with a carbon chain backbone
characteristics of polymers - ANSWER soft ductile low strength low density
insulating
amorphous arrangement (non-orderly)
what five things can a tensile test measure (SSDTH) - ANSWER strength stiffness
ductility toughness and hardness
TRUE stress and strain is dependent on what? - ANSWER geometry
, Stress is represented by what variable and is on which axis of a stress strain curve? -
ANSWER sigma and y-axis and in MPa
strain is represented by what variable and is on which axis of a stress strain curve? -
ANSWER cursive e thing and x axis
elastic deformation is - ANSWER reversible
plastic deformation is - ANSWER permanent
FCC characteristics (atoms/cell and coordination #) - ANSWER # atoms/cell=4
coordination #=12
SC (simple cubic) characteristics (atoms/cell and coordination #) - ANSWER #
atoms/cell=1
coordination #=6
BCC characteristics (atoms/cell and coordination #) - ANSWER # atoms/cell=2
coordination #=8
substitutional impurity - ANSWER usual lattice sites, same size atoms and crystal
structure
interstitial impurity - ANSWER sits between usual lattice sits, atoms must be smaller that
host atoms
covalent bond difference in electronegativity - ANSWER large
