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D.T. > November Mocks 2023 > Flashcards

November Mocks 2023 Flashcards

1
Q

What are hardwoods?

A
  • sourced from deciduous trees
  • slow growing meaning they are expensive
  • good aesthetic property
  • dense and hardwearing
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2
Q

Examples of Hardwood

A

Oak- flooring
Beech- window frames
Mahogany- instruments, illegal logging trade, furniture and very aesthetic (warm tones)
Ash- chairs

  • All of them are tough and durable
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3
Q

What are softwood?

A
  • coniferous trees/ evergreen
  • grows faster than hardwood
  • cheap and readily available
  • absorbent properties
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4
Q

Examples of softwood:

A

Pine
- roofing, window sills
- lightweight
Larch
- construction
-water resistant
Spruce
- instruments as it transmits vibrations
-stiff

All of them are used in construction industry

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5
Q

Hardwood vs Softwood

A
  1. hardwoods are stronger and more hard-wearing than softwoods
  2. Flexible, lighter in weight and less dense
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6
Q

Manufactured Boards

A
  • recycled woods
  • low grade timbers
  • wood pieces are bound with adhesives to make man made- manufactured woods
  • susceptible to moisture
  • rigid, stable
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7
Q

Examples of Man. Boards:

A
  1. MDF
    - dense and tough
    - veneers and finishes
  2. Chipboard
    - good compressive strength
    - edges chip
  3. Plywood
    - rotated layers of wood veneers
    - good water resistance
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8
Q

Properties and uses of mild steel

A

Mild steel is low carbon steel
- tough
- ductile
- ferrous metal so it corrodes easily but is a great conductor
- bicycle frames, bolts, screws

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9
Q

Properties and uses of Aluminium

A
  • soft and malleable
  • light weight
  • non ferrous and good conductor
  • foils
  • cans
  • wires
  • window frames
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10
Q

Properties of Alloys

A
  • 2 or more elements
  • improves physical properties and appearance

1.Brass
2.Steel- cars, tools, electrical appliances
3. Stainless steel- durable, aesthetic, construction, utensils

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11
Q

Properties and uses of Thermosets

A
  • high temperature resistance
  • hard and rigid
  • used for structural applications
  • cannot be reformed once set in shape
  • good for adhesives
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12
Q

Examples of Thermosets

A
  1. UREA FORMALDEHYDE
    - good electrical insulator
    - anti-wrinkling in clothes
  2. POLYESTER RESIN
    - flooring. jewellery
  3. EPOXY RESIN
    - adhesives
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13
Q

Properties and uses of Thermoplastics

A
  • soft and flexible
  • can be remoulded
  • not good in heat
  • aesthetics
  • recyclable
  • used for bottles, sports equip, food packaging and packaging
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14
Q

Examples of thermoplastics

A
  • PETE: bottle
  • HDPE: plastic bag
  • PVC: sports equip
  • LDPE: juice bottles
  • PP: food container
  • HIPS: food container
  • Oher e.g. Acrylic
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15
Q

Properties and uses of Recycled Board

A
  • folding carton and packaging industry
    e.g. cereals
  • can be varied thickness
  • can be recycled
  • strong
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16
Q

Examples of Recycled board

A
  1. Cardboard
  2. Corrugated Cardboard: can be printed on
  3. Foil Lined Board: cartons with liquid
17
Q

Smart materials

A

Smart materials have properties that react to changes in their environment. This means that one of their properties can be changed by an external condition, such as temperature, light, pressure, electricity, voltage, pH, or chemical compounds. This change is reversible and can be repeated many times.

18
Q

Example of Smart Material

A

Shape-memory alloys (SMA) are metal alloys that can remember their shape when heated. These alloys have been utilised on spectacle frames that spring back to shape if they are squashed.

19
Q

Types of Energy

A

Kinetic
Hear
Light
Gravitational
Chemical
Sound
Electrical
Elastic
Nuclear

20
Q

Anthropometrics and ergonomics

A
  • The term ergonomics refers to the relationship between people and the products they use.
  • Anthropometrics: understanding people’s measurements and body shapes, designers can create products that more accurately meet their users’ needs
21
Q

social and cultural impact of design

A

Design that ignores cultural and social factors risks alienating certain demographic groups, perpetuating biases, and reinforcing stereotypes. Experience design must actively seek to create inclusive environments that respect all users’ backgrounds and identities.

22
Q

ACCESSFM

A

aesthetics, consumer, cost, environment, size, safety, function and materials.

23
Q

Orthographic design

A

orthographic projection is a way of representing a 3D object.
most commonly used views are top, front, and right side.

24
Q

SUSTAINABILTY- life cycle assessment

A

An analysis of the environmental impact one object has on the world around it.
increasing resource-use efficiency and decreasing liabilities.
-raw material extraction
- manufacturing
- transportation
- Usage/ retail
- waste disposal
- –

25
Q

SUSTAINABILTY- Circular Economy

A

refuse, reduce, reuse, repurpose, and recycle-existing materials and products as long as possible. In this way, the life cycle of products is extended.

It is based on three principles, driven by design: eliminate waste and pollution, circulate products and materials (at their highest value), and regenerate nature. In this way, the life cycle of products is extended.

26
Q

4x Types of motion

A

linear- one direction in straight line
rotary- back and forth or up and down motion
reciprocating- circular motion around an axis
oscillating- back and forth motion in a curved path

27
Q

Lever

A

provides mechanical advantage (MA)
- has a bar and pivot
- MA= load / effort

28
Q

1st level of Lever

A

1st level:
- seesaw action
- pivot is in between the load and effort.

29
Q

2nd level of lever

A
  • similar to a nutcracker
  • from left to right on scale:
  • left is: effort
  • middle: load
  • right: pivot
30
Q

1st level of lever

A
  • like tweezers
  • from right to left on scale
  • left: load
  • middle: effort
  • end: pivot
31
Q

equilibrium

A

when effort and load on either end of a pivot are equal, equilibrium is created

32
Q

Linkages

A

changes the direction, magnitude of the force
- reverse linkage: changes direction of input motion e.g. push is pull
- parallel motion linkage: keeps direction of input motion same as input
- Bell crank L: input is turned through 90 deg
- Crank and slider: rotary to reciprocating motion
- Treadle: Rotary to oscillating motion

33
Q
A

D.T. (3 decks)

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