WorksheetsMidterm: MSE
Total questions: 41
Worksheet time: 1hrs 1mins
Which material is the most brittle?
Aluminum
Steel
Copper
Glass
Quartz is what type of material?
Metal
Ceramic
Polymer
Composite
You need to build a prototype of a design and need to choose a material that is strong and able to withstand the outdoor elements. You are not concerned about cost. Which type of material should you choose?
Plastic
Wood
Metal
What does it mean for an object to be brittle?
Able to stretched without losing toughness
Hard and breaks easily
Able to be hammered out of shape without breaking
The compactness of a material
What does it mean for an object to be malleable?
Able to stretched without losing toughness
Hard and breaks easily
Able to be hammered out of shape without breaking
The compactness of a material
Three main classes of materials EXCEPT?
metallic
ceramic
nanometarial
polymeric
Type of material that inorganic, crystalline in nature, good thermal and electrical conductor?
composite material
metallic material
polymeric material
ceramic material
What are considered as the building blocks for engineering materials?
atoms
elements
matters
compounds
What is the hardest materials in nature?
What is Materials all about?
substance of which something is composed or made
earth crust and atmosphere
stone, wood, clay, skins
ALL
In atomic systems, the APF is calculated by assuming that atoms are rigid spheres.
True
False
This refers to any structure made up of ions, molecules, or atoms that are held together in a three-dimensional order.
Polycrystals
Crystalline structure
Non-Crystalline structure
This refers to the number of ions in a crystal lattice that immediately surround an ion of the opposite charge.
Atomic packaging factor
Coordination number
Atomic mass
Non-crystalline/Amorphous Material -do not crystallize and the long-range atomic order is absent.
True
False
This is the basic structural unit or building block of the crystal structure.
Unit cells
Atomic hard sphere model
Lattice
FCC has a coordination number of:
12
0.74
0.68
8
What is an example of a non-crystalline ceramic?
Steel
Glass
Kevlar
Bronze
It involves investigating the relationships that exist between structures and properties of materials.
Biotechnology
Nanotechnology
Materials Engineering
Materials Science
It is a commonly encountered composite material.
Clay
Cement
Plywood
Glass
It is a chemical bond that involves the sharing of electron pairs between atoms.
covalent
ionic
induced dipole
ion-ion
It is the complete transfer of valence electrons between atoms.
covalent
ionic
induced dipole
ion-ion
It has a crystalline structure in which the atoms are arranged in orderly manner.
Composites
Metals
Polymers
Nanomaterials
Greek word for pottery
(a)
It is a combination of two materials with different physical and chemical properties.
Composites
Metals
Polymers
Nanomaterials
A crystal is a solid composed of atoms, ions, or molecules arranged in a pattern that is periodic in HOW MANY DIMENSIONS?
1
2
3
4
An extra lattice point is centered in the exact middle of the cell.
body-centered
end-centered
face-centered
simple primitive unit cell
An extra lattice point is centered in every face of the cell.
body-centered
end-centered
face-centered
simple primitive unit cell
No. of atoms in FCC unit cell
3
2
4
12
No. of atoms in FCC unit cell
3
2
4
12
For a Simple Cubic structure, r is the radius of the atom, a is lattice parameter ; the relationship between r and a
r = 0.5a
r = a/3
r = a/8
r = a3/4
BCC structure has APF
52
68
74
none
FCC structure has coordination number
8
6
12
No. of Bravais lattice in 3 D
12
6
8
14
Basis + Crystal lattice is known as
Crystal structure
Lattice
Basis
None
How do metallic materials exhibit their conductivity properties at the atomic level?
By having atoms arranged in a regular lattice structure.
By having loosely bound valence electrons that can move freely.
By having a high degree of transparency to light.
By having a high resistance to deformation.
Why do atoms form chemical bonds with other atoms?
To decrease their stability.
To increase their potential energy.
To achieve a more stable electron configuration.
To decrease their reactivity.
What distinguishes metallic bonding from covalent and ionic bonding?
Metallic bonding involves the transfer of electrons between atoms.
Metallic bonding results in the formation of discrete molecules.
Metallic bonding involves the delocalization of electrons within a sea of positive ions.
Metallic bonding occurs only between atoms of the same element.
How do the atomic arrangements differ between crystalline and amorphous materials?
Crystalline materials have a random atomic arrangement, while amorphous materials have a highly ordered structure.
Crystalline materials have a repeating and ordered atomic arrangement, while amorphous materials lack long-range order.
Crystalline materials have larger atomic spacing compared to amorphous materials.
Crystalline materials consist of atoms with higher atomic numbers compared to amorphous materials.
What distinguishes hexagonal close-packed (HCP) crystal structures from FCC and BCC structures?
HCP structures have a hexagonal unit cell, while FCC and BCC structures have cubic unit cells.
HCP structures have a higher density of atoms compared to FCC and BCC structures.
HCP structures have fewer slip systems available for plastic deformation compared to FCC and BCC structures.
HCP structures have a simpler atomic arrangement compared to FCC and BCC structures.
How do the arrangements of atoms in face-centered cubic (FCC) and body-centered cubic (BCC) crystal structures differ?
FCC structures have atoms at the corners and in the center of each face, while BCC structures have atoms at the corners only.
FCC structures have atoms at the corners only, while BCC structures have atoms at the corners and in the center of each face.
FCC structures have atoms at the corners and in the center of each face, while BCC structures have atoms at the corners and in the center of the cube.
FCC structures have atoms at the corners only, while BCC structures have atoms at the corners and in the center of the cube.
How does the concept of close-packed structures explain the atomic arrangement in metallic crystals?
Close-packed structures consist of atoms arranged in a lattice with minimal empty space between them.
Close-packed structures feature atoms packed closely together with no empty space between them.
Close-packed structures maximize the distance between adjacent atoms to reduce repulsive forces.
Close-packed structures exhibit a random arrangement of atoms with no specific order.
