1. materials (metals and material properties)

Question 1

What are the two main types of metals?

Answer 1

Ferrous and non-ferrous metals

Question 2

What are the characteristics of ferrous metals?

Answer 2

• contain iron
• magnetic
• metals that corrode quickly if not treated with a suitable surface finish

Question 3

What are the characteristics of non-ferrous metals?

Answer 3

• do not contain iron
• much more corrosion resistant than ferrous metals
• they are generally more expensive then ferrous metals

Question 4

What are ferrous metals?

Answer 4

any metal that contains iron and will rust

Question 5

What are non-ferrous metals?

Answer 5

metals that do not contain iron and will not rust

Question 6

What are examples of ferrous metals?

Answer 6

• mild steel
• carbon steel
• cast iron
• wrought iron

Question 7

What are examples of non-ferrous metals?

Answer 7

• aluminium
• copper
• tin
• zinc

Question 8

What are examples of alloys?

Answer 8

• brass
• bronze
• duralumin
• pewter

Question 9

What are the properties of aluminium?

Answer 9

• light weight
• light grey in colour
• can be polished to a mirror like appearance
• rust resistant

Question 10

What are the properties of mild steel?

Answer 10

• heavy
• dark grey in colour
• rusts very quickly in exposed

Question 11

What are the properties of stainless steel?

Answer 11

• heavy
• shiny appearance
• very resistant to wear/rust

Question 12

What are the properties of cast iron?

Answer 12

• re-melted pig iron with some quantities of other metals
• strong in compression
• brittle

Question 13

What are the properties of copper?

Answer 13

• reddish brown metal
• soft
• excellent conductor of heat and electricity

Question 14

What are the properties of brass?

Answer 14

• yellow metal
• hard
• alloy

Question 15

What is a composite material?

Answer 15

A mix of 2 different types of material to get the best qualities from each

Question 16

What are 2 examples of composite materials?

Answer 16

• carbon fibre
• GRP fibreglass

Question 17

What are the properties of carbon fibre?

Answer 17

• expensive in comparison to other materials
• very good strength to weight ratio

Question 18

What are the uses of carbon fibre?

Answer 18

• manufacture of high end sports cars
• sports equipment

Question 19

What does GRP stand for?

Answer 19

glass reinforced plastic

Question 20

What are the properties of GRP?

Answer 20

• lightweight
• good thermal insulation properties
• high strength to weight ratio

Question 21

What is GRP composed of?

Answer 21

• strands of glass which are woven to form a flexible fabric
• the fabric is normally placed in a mould and polyester resin is added

Question 22

What are the 6 material properties?

Answer 22

1. strength
2. elasticity
3. ductility
4. malleability
5. hardness
6. toughness

Question 23

What is the strength of a material?

Answer 23

the ability of a material to stand up to forces being applied without it bending, breaking, shattering or deforming in any way

Question 24

What is the elasticity of a material?

Answer 24

the ability of a material to absorb force and flex in different directions, returning to its original position

Question 25

What is the ductility of a material?

Answer 25

the ability of a material to change shape, deform, usually by stretching along its length

Question 26

What is the malleability of a material?

Answer 26

the ability of a material to be reshaped in all directions without cracking

Question 27

What is the hardness of a material?

Answer 27

the ability of a material to resist scratching, wear and tear and indentation

Question 28

What is the toughness of a material?

Answer 28

a characteristic of a material that does not break or shatter when recieving a blow or under a sudden shock

Question 29

What are alloys?

Answer 29

metals made from a mix of 2 metals

Question 30

What is brass made of?

Answer 30

copper and zinc