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DT > DT > Flashcards

DT Flashcards

1
Q

What’s the Process to make Paper

A

Pulping

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2
Q

What is pulping

A

Boiling up the wood to make pulp

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3
Q

What is the wood pulp called

A

Cellulose Fibres

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4
Q

What Is pulping

A

Turning a raw materials into a useable product

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5
Q

What are 2 ways you can make wood into wood pulp

A

By machine
By Chemicals

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6
Q

What is Mechanical Pulp

A

Cheapest way to produce wood pulp
Low Quality
Used for newspapers
Does not remove Lignin (turns yellow over time

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7
Q

What is chemical pulp

A

Uses less energy
Are dissolved in a chemical by heat and pressure
Removes Lignin

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8
Q

What happens once you have wood pulp

A

It’s bleached and fed into a FOURDRINIER machine

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9
Q

What is Composites

A

A product made from more than one material

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10
Q

What is offset lithography

A

Most commonly used product in the printing industry

The image is transferred onto a flat printing plate

Great for printing more than 1000 copies or more

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11
Q

What is MDF

A

Smooth even finish,easily machined,painted,stained,water/fire resistant forms available

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12
Q

What is Plywood

A

Very strong board

Constructed of layers of veneer glued 90 degrees to each other

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13
Q

What is Block board

A

Similar to plywood but central layer made from strips of timber

Used in heaven structure

E.G shelving and worktops

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14
Q

What is malleable

A

Being able to bend without breaking

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15
Q

What is ductility

A

Being able to be stretched without breaking

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16
Q

What is Elasticity

A

To return to its original condition after being stretched

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17
Q

What is Linear motion

A

Moving one way in a straight line

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18
Q

Reciprocating motion

A

Moving backwards and forwards in a straight line

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19
Q

What is Oscillating motion

A

Moving backwards and forwards in one arc

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20
Q

What is Rotary motion

A

Moving in a circle

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21
Q

What are gears

A

Used to change the direction of motion

Or change the magnitude (size) of the input force

22
Q

Using a Third gear is called

A

Idler gear makes both turn in same direction

23
Q

What are smart materials

A

They change their properties when their environment changed

24
Q

What are Shape Memory Alloys

A

Metal alloys with memory properties

They return to original condition through heating

Nitinol is an SMA

25
Q

What is Thermochromic Pigments

A

Change colour when there’s a change in temperature

26
Q

What is Photochromic Pigments

A

Change colour depending on light levels

27
Q

What are the 6rs

A

Rethink
Refuse
Repair
Reduce
Recycle
Reuse

28
Q

What is Renewable Energy

A

Non finite

Energy that can be replenished

29
Q

Wind energy

A

Wind turbines energy convert into electricity

Pros:No greenhouse gas.Once set up energy is cheap

Cons:Setup cost are high.Turbines are unreliable and unsightly and cause noise pollution

30
Q

Solar energy

A

Convert sun energy into electricity

Pros:No greenhouse gases.Once set up energy is cheap

Cons:No electricity is available in no sunlight.Very expensive

31
Q

Tidal

A

Turbines convert energy from tides and water currents Into electricity

Pros:Always predictable and produce no greenhouse gas

Cons:Costly and can disrupt ecosystems

32
Q

Hydro electric

A

As trapped water is released from dams its kinetic energy is released into electricity

Pros:Once set up HE is cheap.Provides resources during water shortages

Cons:Set up cost are high.When they are built habitats are destroyed

33
Q

Biomass

A

Organic material such as animal waste or crops are burned for energy or processed into biofuel

Pros:Very affordable and renewable if resources we replaced

Cons:Burning biomass released Co2.Using wolf can lead to deforestation

34
Q

What are fossil fuels

A

Are non renewable natural resources formed from the remains of organisms

35
Q

Pros of fossil fuels

A

Generates large amount of energy

Provides a reliable supply of energy

36
Q

Cons of fossil fuels

A

Releases greenhouse gases which cause pollution and contribute to global warming

Will eventually run out

37
Q

What is Built-in obsolescence

A

Products that are not built to past
E.g disposable razors

38
Q

Why is built in obsolescence bad for the environment

A

More materials and energy are used to make replacement product.

39
Q

What is Fair Trade

A

Ensuring that farmers in low income countries get a fair price to their product

40
Q

What is Cooperative

A

A business that is owned and run by its workers or members.

41
Q

What is Crowdfunding

A

Enabling individuals or businesses to promote an idea on a platform,such as a website,to a large audience.People can then choose to invest money in projects they like

42
Q

What is Virtual marketing and retailing

A

The increased use of advertising online such as social media adverts and pay-per-click advertising

43
Q

What is JIT production

A

When products arrive when needed

44
Q

Pros Of JIT

A

Saves space

No need to pay for storage-money

Stock is less likely to go out of date

45
Q

Cons of JIT

A

Delivery could be late
Could deliver wrong part
Increased transport costs

46
Q

What is quality control

A

Checks quality of the product.Mostly done at every stage.

Involves testing materials products or components against the manufacturing.

47
Q

What is Tolerance

A

The required accuracy of a measurement

48
Q

What is a reference point

A

Spoilt where all measurements are taken

49
Q

What are the rules of one point perspective

A

Draw the front face of the object first

Vertical edges are shown as vertical lines

Horizontal edges are shown as horizontal lines

All other lines go to the vanishing point on the horizon

50
Q

What are exploded diagrams used for

A

To show how parts of a product fit together

DT (1 decks)

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