Unit 2-A (Metals)

Question 1

What are examples of pure metals?

Answer 1

Copper
Silver

Question 2

What are the properties and characteristics of copper?

Answer 2

Good electrical conductivity
Good heat conductivity
Corrosion resistance
Brittle
Very malleable and ductile

Question 3

What are the properties and characteristics of silver?

Answer 3

Best for electrical and heat conductivity
Expensive
Tarnishes quite quickly
Very malleable, can be bent into intricate shapes

Question 4

What are example uses of copper?

Answer 4

Wire
Saucepans
Pipes

Question 5

What are example uses of silver?

Answer 5

Jewellery
High value tableware
Electrical contacts
Plating cheaper metals
Mirrors

Question 6

What are examples of metal alloys?

Answer 6

Brass
Pewter
Bronze
Low carbon steel
Medium carbon steel
Stainless steel

Question 7

What are the properties and characteristics of aluminium alloy?

Answer 7

Very high strength to weight ratio
Corrosion resistance
Some are harder

Question 8

What are the properties and characteristics of brass?

Answer 8

Brittle
Corrosion resistant
Excellent conductor

Question 9

What is the composition of brass?

Answer 9

63% Copper
37% Zinc

Question 10

What are the properties and characteristics of pewter?

Answer 10

Very low melting point
Ideal for casting

Question 11

What is the composition of pewter?

Answer 11

90% Tin
4% Copper
2% Lead
2% Bismuth

Question 12

What are the properties and characteristics of bronze?

Answer 12

High strength
Resistant to corrosion

Question 13

What is the composition of bronze?

Answer 13

90% Copper
10% Tin

Question 14

What are the properties and characteristics of low carbon steel?

Answer 14

Very tough
Very durable
Can be shaped and cut with traditional tools
Will rust

Question 15

What is the composition of low carbon steel?

Answer 15

99.98% Iron
0.02% Carbon

Question 16

What are the properties and characteristics of medium carbon steel?

Answer 16

Much harder than low carbon steel
Can cut low carbon steel

Question 17

What is the composition of medium carbon steel?

Answer 17

97.5% Iron
2.5% Carbon

Question 18

What is the composition of stainless steel?

Answer 18

84.85% Iron
0.15% carbon
15% chromium

Question 19

What are the properties and characteristics of stainless steel?

Answer 19

Very good resistance to corrosion
Tougher than low carbon steel

Question 20

How are alloys manufactured?

Answer 20

Separate metals are melted
They are combined and then left to cool

Question 21

What are example uses of aluminium alloy?

Answer 21

Engine blocks
Car body panels
Plane parts
Aluminium cans

Question 22

What are example uses of brass?

Answer 22

Fittings inside plugs
Ornaments
Fittings on boats

Question 23

What are example uses of pewter?

Answer 23

Cast ornaments
Jewellery

Question 24

What are example uses of bronze?

Answer 24

Architectural components
Coins
Electrical contacts

Question 25

What are example uses of low carbon steel?

Answer 25

Car bodies Nuts and bolts Nails Frames

Question 26

What are example uses of medium carbon steel?

Answer 26

Cutting tools Blades

Question 27

What are example uses of stainless steel?

Answer 27

Kitchen utensils Cutlery Saucepans Sinks Boat and ship fittings

Question 28

What are the common metal stock forms?

Answer 28

Rod Sheet Bar Tube