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DT > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q

What are fossil fuels?

A

It is a fuel formed by natural processes

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2
Q

What are renewable alternatives to fossil fuels?

A 
Wind
Solar Power
Tidal
Biomass
Hydroelectric
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3
Q

What is good about wind power?

A

It is renewable
It is reliable
It can generate lots of energy

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4
Q

What is bad about wind power?

A

It is expensive to make and service
It is loud, so resident will most likely complain against these
Birds can die due to these and they cannot see them and if they go in they will get chopped

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5
Q

What are the advantages of coal?

A

There is a lot of it on the earth which can last up to 100 years
It produces large amounts of energy

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6
Q

What are the disadvantages of coal?

A

It produces carbon dioxide which contributes to global warming
Damage is caused to the land when mining takes place

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7
Q

What are biofuel and biomass created from?

A

They are created from organic matter which is burned to generate power

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8
Q

What are some examples of biomass fuels?

A

Food, Farm waste, Compost

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9
Q

What are photovoltaic cells?

A

They convert light energy into electric current

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10
Q

What are biofuel and biomass created from?

A

They are created from organic matter which is burned to generate power

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11
Q

What are some examples of biomass fuels?

A

food, farm waste, compost

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12
Q

Where does 11% of the world’s electricity come from?

A

Nuclear Power

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13
Q

What are the different types of potential energy?

A

Chemical Energy
Mechanical Energy
Nuclear Energy

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14
Q

What are the different types of mechanical storages?

A

Compression
Tension
Motion

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15
Q

Which non-stick modern material is used to coat some kitchen equipment?

A

Teflon

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16
Q

What does biodegradable mean?

A

Broken down by water, oxygen, sunlight, bacteria etc…

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17
Q

What is polycaprolactone?

A

It is is a low temperature hand-mouldable polymer

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18
Q

What is Flexible MDF?

A

It allows for the creation of natural curves

19
Q

What are the good things about Titanium?

A

It is

  • light weight
  • tough
  • stiff
  • has a low density
  • Doesn’t react with the human body
  • It is used for broke bones
20
Q

What are the good things about LCD? (Liquid Crystal Display)

A

The screens can be small and lightweight
LCDs do not emit light, so they require black lighting
They have very low power consumption

21
Q

How do self healing polymers heal?

A

They react to stress fractures by releasing a resin into the new crack

22
Q

What is a thermochemistry pigment?

A

A pigment that changes according to temperature

23
Q

What is a composite materials?

A

Something made up of 2 or more materials

24
Q

What does synergy mean?

A

When 2 or more materials make a better material together

25
Q

What is concrete made from?

A

Sement, sand and water

26
Q

What is GRP and give examples of it?

A

It means glass reinforced plastic and some examples are , windows and in sports cars

27
Q

What is CRP and give examples of it?

A

It means carbon fibre reinforced plastic and an example of it is diamond

28
Q

What does detaminate mean?

A

When the layers come apart

29
Q

What does VOC mean and give some reasons why it is bad?

A

Volatile Organic Compound
It stings
It is not good for a out health
It is not good for the planet

30
Q

What does weatherproofing mean?

A

Making an object or structure waterproof

31
Q

What is Gore-tex?

A

It is a waterproof material that only lets water vapour through and not water

32
Q

What is aramid?

A

Particularly tough fibres made denim modified polyamide

33
Q

What is QTC?

A

It is a polymer that contains billions of metal particles that don’t touch each other

34
Q

What does PPE mean?

A

Personal Protective Equipment

35
Q

What is an open loop system?

A

It is a system that has no feedback and is unable to make a decision

36
Q

What is a closed loop system?

A

It is a system that is able a decision using feedback, usually from a sensor

37
Q

What is keviar?

A

It is a heat resistant and strong synthetic fiber

38
Q

What is microencapsulation?

A

Solids, Liquids or gasses are sealed in tiny capsules

39
Q

Good things with microcontroller ICs?

A

These programmable ICs are very adaptable
They can be programmed to perform multiple processes
Reduces the amount of components needed to perform a task

40
Q

What does it mean when an object is moving in a reciprocating motion?

A

Moving back and forth

41
Q

What does it mean when an object is oscillating?

A

Swinging on a curve

42
Q

What does it mean when an object is moving in a linear direction

A

In a straight line

43
Q

What does it mean when an object is moving in a rotary motion?

A

Moving in a circle

44
Q

What are the 4 different types of cams?

A

Eccentric Cam
Heart Shaped Cam
Snail Cam
Pear Cam

DT (4 decks)

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