Chapter 2

Question 1

What are fossil fuels?

Answer 1

It is a fuel formed by natural processes

Question 2

What are renewable alternatives to fossil fuels?

Answer 2

Wind
Solar Power
Tidal
Biomass
Hydroelectric

Question 3

What is good about wind power?

Answer 3

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

Question 4

What is bad about wind power?

Answer 4

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

Question 5

What are the advantages of coal?

Answer 5

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

Question 6

What are the disadvantages of coal?

Answer 6

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

Question 7

What are biofuel and biomass created from?

Answer 7

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

Question 8

What are some examples of biomass fuels?

Answer 8

Food, Farm waste, Compost

Question 9

What are photovoltaic cells?

Answer 9

They convert light energy into electric current

Question 10

What are biofuel and biomass created from?

Answer 10

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

Question 11

What are some examples of biomass fuels?

Answer 11

food, farm waste, compost

Question 12

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

Answer 12

Nuclear Power

Question 13

What are the different types of potential energy?

Answer 13

Chemical Energy
Mechanical Energy
Nuclear Energy

Question 14

What are the different types of mechanical storages?

Answer 14

Compression
Tension
Motion

Question 15

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

Answer 15

Teflon

Question 16

What does biodegradable mean?

Answer 16

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

Question 17

What is polycaprolactone?

Answer 17

It is is a low temperature hand-mouldable polymer

Question 18

What is Flexible MDF?

Answer 18

It allows for the creation of natural curves

Question 19

What are the good things about Titanium?

Answer 19

It is

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

Question 20

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

Answer 20

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

Question 21

How do self healing polymers heal?

Answer 21

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

Question 22

What is a thermochemistry pigment?

Answer 22

A pigment that changes according to temperature

Question 23

What is a composite materials?

Answer 23

Something made up of 2 or more materials

Question 24

What does synergy mean?

Answer 24

When 2 or more materials make a better material together

Question 25

What is concrete made from?

Answer 25

Sement, sand and water

Question 26

What is GRP and give examples of it?

Answer 26

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

Question 27

What is CRP and give examples of it?

Answer 27

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

Question 28

What does detaminate mean?

Answer 28

When the layers come apart

Question 29

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

Answer 29

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

Question 30

What does weatherproofing mean?

Answer 30

Making an object or structure waterproof

Question 31

What is Gore-tex?

Answer 31

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

Question 32

What is aramid?

Answer 32

Particularly tough fibres made denim modified polyamide

Question 33

What is QTC?

Answer 33

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

Question 34

What does PPE mean?

Answer 34

Personal Protective Equipment

Question 35

What is an open loop system?

Answer 35

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

Question 36

What is a closed loop system?

Answer 36

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

Question 37

What is keviar?

Answer 37

It is a heat resistant and strong synthetic fiber

Question 38

What is microencapsulation?

Answer 38

Solids, Liquids or gasses are sealed in tiny capsules

Question 39

Good things with microcontroller ICs?

Answer 39

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

Question 40

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

Answer 40

Moving back and forth

Question 41

What does it mean when an object is oscillating?

Answer 41

Swinging on a curve

Question 42

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

Answer 42

In a straight line

Question 43

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

Answer 43

Moving in a circle

Question 44

What are the 4 different types of cams?

Answer 44

Eccentric Cam Heart Shaped Cam Snail Cam Pear Cam