Metals

Question 1

Ferrous Metals

Answer 1

Metals that contain iron

Question 2

Examples of Ferrous Metals

Answer 2

Mild steel- used in school workshops and engineering products, tough, rusts easily
Carbon steel- tough and can be hardened and tempered, cuts tools like drills
Stainless steel- tough, resistant to stains and rust, musical instruments and cutlery

Question 3

Examples of Non-Ferrous Metals

Answer 3

Aluminium- ductile, malleable and very light, used for window frames and aircrafts
Copper- conducts electricity and heat, used for kettles and pipes
Zinc- hard, brittle and very weak , used to galvanise steel and coating for screws

Question 4

Tensile Strength

Answer 4

Withstanding force when stretched

Question 5

Compressive Strength

Answer 5

Withstanding force when being crushed

Question 6

Durability

Answer 6

Withstanding wear and tear and withering

Question 7

Flexibility

Answer 7

How easily a material will bend or distort

Question 8

Plasticity

Answer 8

Changing in shape permanently without cracking or bending

Question 9

Elasticity

Answer 9

The ability to regain its original shape after being deformed

Question 10

Malleability

Answer 10

The ability to be easily presses, spread or hammered into shape

Question 11

Ductility

Answer 11

The ability to be stretched and permanently deformed without breaking

Question 12

Brittleness

Answer 12

How easily a material will break without bending(opposite to ductile)

Question 13

Hardness

Answer 13

Resistance to scratching, cutting, denting and wear

Question 14

Toughness

Answer 14

Resistance to sudden shock without breaking or deforming

Question 15

Impact Resistant

Answer 15

Resisting denting

Question 16

Shear

Answer 16

Strong sliding forces acting opposite to each other

Question 17

Stress

Answer 17

Any forces acting on a material

Question 18

Electrical Conductivity

Answer 18

How easily a material allows electricity to flow through it

Question 19

Thermal Conductivity

Answer 19

How easily a material allows heat to flow through it

Question 20

Chemical Resistance

Answer 20

Resists chemical attack

Question 21

Welding

Answer 21

Pieces of metal are melted together along the joints fusing together as they cool.

Question 22

Bolts

Answer 22

Nuts bolts and washers are when a joint needs to be taken apart

Question 23

Pop Rivets

Answer 23

Enable you to complete the joint while holy having access to one side of the work, usually used for joining sheets together

Question 24

Hardening and Tempering

Answer 24

Intense heat is applied and the metal is cooled slowly depending on the carbon in the steel, so when the metal is cooled it is softer and therefore easier to bend or hit. It is then reheated to give the metal its original properties back

Question 25

Sand Casting

Answer 25

Place a pattern in a sand to create a mold, incorporate the pattern and sand in the grating system, remove the pattern and fill the mold with molten metal, allow the metal to cool and break away the sand mold and remove the casting

Question 26

Die Casting

Answer 26

Molten metal is poured into the dye under high pressure and forced through a cavity. Pushed into the shape- similar to injection moulding

Question 27

Pressing and Stamping

Answer 27

Fabrication from a thin sheet of metal into an object that cannot be unbended. Place metal sheet into a blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape, used in aircrafts

Question 28

Milling

Answer 28

Uses rotary cutters to remove material, programmed control that moves up and down vertically on an axis while the table moves horizontally against the milling cutter. Good for high speed and accuracy but expensive

Question 29

Dip Coating

Answer 29

The dipping of metal components into thermoplastic powders

Question 30

Galvanising

Answer 30

Applying zinc coating to steel or iron to prevent it rusting. Most common way is dipping metal components into a bath of molten steel predicting corrosive stub stances from reaching the most delicate part of the metal

Question 31

Smart Alloys

Answer 31

A smart material that can remember its original shape for example copper, zinc and aluminium

Question 32

Non-Ferrous Metals

Answer 32

Metals that do not contain iron