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Engineering Year 11 Prelim > Module 1: Engineering Fundamentals > Flashcards

Module 1: Engineering Fundamentals Flashcards

1
Q

What are Materials Classed as?

A
  • Metals
  • Polymers
  • Ceramics
  • Composites
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2
Q

What are the Mechanical Properties of Materials?

A
  • Strength
  • Hardness
  • Elasticity
  • Stiffness
  • Plasticity
  • Malleability
  • Ductility
  • Faitugue
  • Notch Toughness
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3
Q

what is Strength?

A

Withstand applied lads without failure

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4
Q

What is Hardness?

A

Resist scratching, abrasion or indentation

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5
Q

what is Elasticity

A

Return to its original shape and dimensions after being subjected to a load.

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6
Q

what is Stiffness

A

Resit elastic deformation under load

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7
Q

What is plasticity

A

Undergo some degree of permanent deformation without rupture

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8
Q

What is Malleability

A

Be hammaered or rolled into thin sheets

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9
Q

What is Ductility

A

drawn out into a thin wiere

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10
Q

what is fatigue

A

The tendency of a material to break when subjected to repeated cyclic loading where the induced stress is well under the elastic limit

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11
Q

What is Notch Toughness

A

A measure of the amount of energy required to cause failure

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12
Q

What the 3 Types of Magnetism

A
  • Diamagnetic : Ionic and molecular materials
  • Paramagnetic: Materials with a single valance election
  • Ferromagnetic: Large amounts of unpaired elections can become permanent magnets
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13
Q

List the Physical Properties of Materials

A
  • Density : P = m/v - Porosity
  • Moisture content
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14
Q

List Properties of Metals

A
  • High Electrical Conductivity
  • High Thermal Conductivity
  • Ductile
  • Tough
  • Strong (Strength)
  • Stiff
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15
Q

What are alloys and why are they used?

A

Alloys are a combination of elements / metals which are created to achieve desired properties such as Hardness

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16
Q

What are Ferrous Metals / Alloys? - Give Examples

A

Metal Alloys that contain greather than 50% iron content. E.g

  • Plain Carbon Steels
  • Alloy Steels
  • Cast Irons
17
Q

What are Non- Ferrious Alloys? - Give Examples

A

Metals alloys that contain less than 50% Iron content e.g.

  • Light alloys of Aluminium, Magnesium, Titanium, Zinc
  • Heavy Alloys of Copper, Lead, Nickel
  • Precious Metals - Gold, Silver, Platnium
  • Heating resting metals - Molybdenum, Tungsten
18
Q

List the properties of Copper

A
  • Excellent Electrical conductivity (used primarly in wiring and motors
  • Ductile
  • Corrosion Resistence (Used in roofing / gutters, cookware)
19
Q

List properties of Aluminium

A
  • Corrosion resistant and light weight (Foil, Cans, CD, Kitchenware)
20
Q

List the Propeties of Brass

A

Alloy of Copper and Zinc (Mostly Copper, known as a copper alloy)

  • Bright Gold like apperance (Decorations)\
  • Used where low friction is required (Locks, Door Knobs, Bearings)
  • Brass Instruments - Mallable with Acoutsitc properties (softer the metal, warmer the sound)
21
Q

List the Properties of Bronze

A

Composed of Tin and Copper

B20 Bronze = 20% Tin 80% Copper

Tougher B8 Bronze = 8% Tin 92%

Copper Ideal for machining into bronze bearings and bushings

  • Malleable
  • Low metal on metal friction Used for Sculptures, Instruments and Medals
  • Corrosion resistant
22
Q

List the Properties of Aluminium Bronze

A

Composed of Copper / Aluminium -High shock resistance

  • Corrosion resistant
  • High Strength / Toughness
  • Good Casting and welding characteristics (Used in machinary tools)
23
Q

What are the different types of Bonds?

A

Primary: Ionic, Covalent, Metallic

Secondary: Van Der Waals, Hydrogen

24
Q

What are Allotopes?

A

Allotropes are different forms of a material due to modified bonding.

25
Q

What are some Allotopes of Carbon?

A
  • Diamond
  • Graphite
  • Graphine
  • Nanotube
  • Fullerene
26
Q

What is the Unit Cell?

A

When metals solidify, their atoms form a crystal lattice. Within this lattice, the atoms are arranged into a certain packing order win what is called the unit cell.

27
Q

Describe the Properties of a BCC Metal Structure

A

BCC = Body Centered Cubic

  • Harder and Less Malleable
28
Q

Describe FCC Metal Structure

A

FCC = Face Centered Cubic

  • High Ductility (less interlocking)
29
Q

Describe The HCP Crystal Stucture

A

HCP = Hexagonal Close Packed

  • Both Characteristics of BCC and FCC
30
Q

Why are metals strong during Compression and Tension?

A

Because they have a crystalline structure when they solidify of either BCC, FCC or HCP

-Regular Crystal Structure

31
Q

What are Non-Crystalline structures refered to?

A

Amophous - Break into unven pieces with irregular edges.

E.g. Glass / some ceramics

32
Q
A

Engineering Year 11 Prelim (1 decks)

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