Metals (General)

Question 1

Steel is made up of…

Answer 1

Iron and carbon

Question 2

Percentage of carbon in mild steel

Question 3

Properties of mild steel

Answer 3

Malleable, ductile

Question 4

Percentage of carbon in medium steel

Answer 4

0.2-0.6%

Question 5

Properties of medium steel

Answer 5

Tougher and harder than mild steel

Question 6

Percentage of carbon in high carbon steel

Answer 6

0.6-1.5%

Question 7

Properties of high-carbon steel

Answer 7

Tough and hard, but brittle

Question 8

Use of mild steel

Answer 8

• car bodies
• machinery
• cables
• nails
• chains

Question 9

Uses of medium steel

Answer 9

• steel girders

- rails

Question 10

Uses of high carbon steel

Answer 10

• cutlery
• tools
• springs

Question 11

Brass is made up of…

Answer 11

Copper and zinc

Question 12

Bronze is made up of…

Answer 12

Copper and tin

Question 13

Pewter is made up of…

Answer 13

Lead, tin, antimony

Question 14

Solder is made up of…

Answer 14

Tin and lead

Question 15

Stainless steel is made up of…

Answer 15

Iron, chromium, nickel

Question 16

Duralumin is made up of…

Answer 16

Aluminium, copper

Question 17

Types of steel

Answer 17

• stainless steel
• chromium steel
• high-speed steel
• manganese steel

Question 18

Uses of brass

Answer 18

• electric plug

Question 19

Uses of bronze

Answer 19

• propellers

Question 20

Uses of pewter

Answer 20

• souvenir

Question 21

Uses of solder

Answer 21

• joining electrical connections

Question 22

Uses of stainless steel

Answer 22

• cutlery

Question 23

Uses of duralumin

Answer 23

• aircraft bodies

Question 24

Stainless steel is made up of…

Answer 24

Iron, carbon, chromium, nickel

Question 25

Chromium steel is made up of...

Answer 25

Iron, carbon, chromium

Question 26

High-speed steel is made up of...

Answer 26

Iron, carbon, tungsten, vanadium

Question 27

Manganese steel is made up of...

Answer 27

Iron, carbon, manganese

Question 28

Properties of stainless steel

Answer 28

- corrosion-resistant | - acid-resistant

Question 29

Uses of stainless steel

Answer 29

- cutlery | - chemical plants

Question 30

Properties of chromium steel

Answer 30

- hard | - corrosion-resistant

Question 31

Uses of chromium steel

Answer 31

- ball bearings

Question 32

Properties of high-speed steel

Answer 32

- very hard | - heat resistant

Question 33

Uses of high-speed steel

Answer 33

- high-speed drills

Question 34

Properties of manganese steel

Answer 34

- very high tensile strength

Question 35

Uses of manganese steel

Answer 35

- rock-breaking machinery | - railway crossovers

Question 36

Conditions for rusting

Answer 36

- water | - oxygen

Question 37

State several rust-prevention methods:

Answer 37

- sacrificial protection | - coating iron in oil/grease/paint

Question 38

Properties of zinc

Answer 38

- reactive metal | - bigger atomic radius than copper

Question 39

Uses of zinc

Answer 39

- galvanisation | - making brass

Question 40

Properties of copper

Answer 40

- good conductor

Question 41

Uses of copper

Answer 41

- electrical wiring | - making alloys

Question 42

Properties of aluminium

Answer 42

- corrosion-resistant - low density - strong

Question 43

Uses of aluminium

Answer 43

- food container | - aircraft bodies

Question 44

Reasons to recycle metals:

Answer 44

- finite resources - discarded metals are not aesthetically appealing - metal is non-biodegradable - land is wasted as landfill - cost of recycling metal is a fraction of the cost of extracting metal - recycling adds job slots + increases employment

Question 45

Characteristics of alloys

Answer 45

- hard+strong - corrosion-resistant - lustrous - disorderly arrangement of atoms, preventing layers from sliding over one another