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DT CLT 2022 Revision > DT CLT 2022 > Flashcards

DT CLT 2022 Flashcards

1
Q

Name 3 types of cutting using a laser cutter.

A

Vector cutting, vector engraving, raster engraving

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2
Q

Describe vector cutting.

A

For cutting shapes out of the material, the laser burns through the entire thickness of the material.

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3
Q

Describe vector engraving.

A

For engraving lines and paths onto the material, a vector file must be used. The laser does not completely burn through the material.

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4
Q

Describe raster engraving.

A

For engraving images onto the surface of the image, similar to a laser printer. A raster file is used such as jpg/png. The laser only burns the surface of the material.

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5
Q

Name 3 advantages of laser cutting.

A

Quick, precise and accurate, leaves a smooth edge so no further finishing is required

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6
Q

Name 3 disadvantages of laser cutting.

A

Machine is expensive, training is needed to use the machine, good ventilation is required as toxic fumes may be produced

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7
Q

Name 3 examples of softwoods.

A

Redwood, spruce, pine

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8
Q

Name 3 examples of hardwoods.

A

Beech, ash, oak

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9
Q

Name 2 advantages of natural timber.

A

Aesthetically pleasing, wood joining techniques are easier

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10
Q

Name 2 disadvantages of natural timber.

A

Prone to warping, irregular properties such as knots and varied grain

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11
Q

Name 3 examples of man-made boards.

A

Plywood, MDF, chipboard

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12
Q

Name 2 advantages of man-made board.

A

Large flat sheets are available without having to join pieces, good dimensional stability

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13
Q

Name 2 disadvantages of man-made board.

A

Cutting man-made boards generates more dust particles than natural timber, edges of man-made boards are unsightly

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14
Q

Name 3 advantages of acrylic plastic.

A

Available in many colors and transparency, can be easily molded into different shapes, UV resistant

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15
Q

Name 2 disadvantages of acrylic plastic.

A

Scratches easily, low heat resistance

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16
Q

Name 2 advantages of plywood.

A

Cost-effective, good dimensional stability

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17
Q

Name 2 disadvantages of plywood.

A

Not waterproof, susceptible to insects and fungus

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18
Q

List 5 methods of metal casting.

A

Sand casting, pewter casting, pressure die casting, gravity die casting, centrifugal casting

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19
Q

What are the top and bottom parts of the container used in sand casting called respectively?

A

Cope and drag

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20
Q

What is the alloy composition of pewter?

A

96% tin and 4% copper

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21
Q

Name the sections of machinery used in pressure die casting.

A

Plunger, pressure chamber, sprue, cavity, ejector die, ejector pins

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22
Q

Name 3 advantages of sand casting.

A

Low cost of mold materials and equipment, suitable for casting large parts, suitable for a wide variety of metals

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23
Q

Name 3 disadvantages of sand casting.

A

Rough surface finish, poor dimensional accuracy, mold cannot be reused

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24
Q

Name 3 advantages of pewter casting.

A

Low cost of mold materials and equipment, intricate shapes can be formed, mold can be reused

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25
Q

Name 2 disadvantages of pewter casting.

A

Pewter is not durable, pewter tarnishes easily

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26
Q

Name 3 advantages of pressure die casting.

A

Excellent dimensional tolerances, high product consistency, mold can be reused

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27
Q

Name 3 disadvantages of pressure die casting.

A

Tooling costs are expensive, size limit of parts that can be cast, not applicable for high melting point metals

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28
Q

Name 3 advantages of gravity die casting.

A

Less expensive than pressure die casting, tighter tolerances compared to sand casting, mold can be reused

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29
Q

Name 3 disadvantages of gravity die casting.

A

Higher costs than sand casting, limited to small simple designs, not applicable for high melting point metals

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30
Q

Name 2 advantages of centrifugal casting.

A

Production of hollow objects with axial symmetry without using a core, impurities separate automatically

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31
Q

Name 2 disadvantages of centrifugal casting.

A

Tooling costs are expensive, inner diameter is inconsistent

32
Q

What does hardening do?

A

Increases the hardness of a metal.

33
Q

What does tempering do?

A

Reduces the brittleness of a metal.

34
Q

How is hardening done?

A

The metal is heated into austenitic crystal phase and then quenched.

35
Q

How is tempering done?

A

The metal is heated to a temperature lower than the critical temperature and held for some time, then cooled.

36
Q

What temperature is used to harden steel?

A

900 degrees Celsius

37
Q

What temperature is used to temper steel?

A

700 degrees Celsius

38
Q

What is intellectual property?

A

An idea that is turned into a physical creation.

39
Q

Name 3 examples of intellectual property.

A

Books, movies, handbag design

40
Q

What are patents?

A

Patents protect the technical working concept behind a product or technology.

41
Q

What are the 2 requirements for a patent?

A

Novel, inventive

42
Q

Name 3 advantages of patents.

A

Provides legal protection over the exploitation of a product by someone else, the patented product is intellectual property and has commercial value, licenses can be appointed to others with potential profitable implications

43
Q

Name 3 disadvantages of patents.

A

Expensive and complicated so attorney is needed, must be renewed every 20 years, highly detailed diagrams are required for successful application

44
Q

Name 7 advantages of injection molding.

A

Efficient and quick, completely automated, high amounts of detail, high consistency, many plastic options, low scrap rates, little post-production needed

45
Q

Name 2 disadvantages of injection molding.

A

Tooling costs are expensive, shape limitations as draft angles must be included

46
Q

What are the three scales of production?

A

One-off, batch, mass

47
Q

Name 2 examples of one-off produced products.

A

Luxury cruise ship, wedding cake

48
Q

Name 2 examples of batch produced products.

A

Pottery, wooden furniture

49
Q

Name 2 examples of mass produced products.

A

Cars, clothing

50
Q

What are the characteristics of one-off production?

A

Increased expense due to specialized production using difficult materials with few economies of scale.

51
Q

Name 2 examples of continuous produced products.

A

PET drink bottles, food and drink cans

52
Q

What is Critical Path Analysis?

A

A project management method used to schedule the most efficient completion of process stages.

53
Q

Name 3 advantages of Critical Path Analysis.

A

Parallel processing opportunities can be exploited for maximum efficiency, unnecessary waiting time can be identified, resource planning efficiency is improved

54
Q

Name 3 disadvantages of Critical Path Analysis.

A

Relies on possibly inaccurate estimates of process durations, difficult to accurately represent highly complex stages, does not account for change in external factors

55
Q

Name 3 goods requirements on the Consumer Rights Act 2015.

A

Satisfactory quality, fit for purpose, as described

56
Q

What is the ‘right to reject goods’ and ‘right to repair or replacement’ in the Consumer Rights Act 2015?

A

Right to full refund within 30 days, right to repair or replacement without proof within 6 months, right to repair or replacement with proof after 6 months.

57
Q

What is the ‘final right to reject’ in the Consumer Rights Act 2015?

A

If a repair or replacement is not possible, the consumer has the right to full or partial refund based on how much the product was used.

58
Q

What makes rubber a suitable material for car tires?

A

Good wear and tear resistance, elastic properties absorb bumps, strong grip for good traction, easy to mold for mass production

59
Q

Name 3 disadvantages of rubber.

A

Poor weather resistance, poor heat resistance, will swell when exposed to oil or fuels

60
Q

Name 3 advantages of pneumatic tires.

A

Lower rolling friction, better ride cushioning, better traction

61
Q

Name 2 disadvantages of pneumatic tires.

A

Flat tires, maintenance and refill

62
Q

Name 2 advantages of solid tires.

A

Immune to punctures, no maintenance needed

63
Q

Name 4 disadvantages of solid tires.

A

Higher rolling friction, worse ride cushioning, worse traction, heavier

64
Q

Name 3 examples of standardized parts.

A

Metric ISO screw threads, light bulbs and fittings, pen ink refill

65
Q

What are standardized parts?

A

Components that can be relied upon to fit correctly when adding or replacing elements of a design.

66
Q

Name 2 advantages of standardized parts.

A

High economies of scale, manufacturer does not need specialized equipment

67
Q

Who founded Bauhaus?

A

Walter Gropius

68
Q

What is the Bauhaus design philosophy?

A

Machine aesthetic approach to ‘form follows function’.

69
Q

Name 3 characteristics of Bauhaus design.

A

Simple geometric shapes, rounded corners and walls, use of tubular steel

70
Q

What method of production does Bauhaus embrace?

A

Mass production to make ‘everyday products’.

71
Q

What aspects of design did Bauhaus influence?

A

Art, architecture, product design, graphic design

72
Q

Name an example of a Bauhaus product.

A

Wassily chairs by Marcel Breuer

73
Q

What was Ludwig Mies van der Rohe known for?

A

German designer known for rectilinear designs crafted in elegant simplicity.

74
Q

What are the characteristics of the ‘International Style’ developed by Mies van der Rohe?

A

Light, planar and rectilinear forms with open interior space and no decoration, often transparent to highlight inner steel structures.

75
Q

Name 2 notable designs by Mies van der Rohe.

A

Barcelona chair and Farnsworth house

DT CLT 2022 Revision (1 decks)

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