fweh

Question 1

Critical evaluation

Answer 1

-manufacturing capabilities
-budget constraints
-timescale
-target audience
-materials used

Question 2

Ethics organisations

Answer 2

-fairtrade
-FSC (Forestry stewardship council)

Question 3

Ethics definition

Answer 3

balancing behaviour with moral principles when carrying out an activity

Question 4

Plywood definition

Answer 4

layers of glued veneers

Question 5

veneer definition

Answer 5

thin layer of material

Question 6

plywood pros

Answer 6

-can make very large sheets
-not flexible; stronger than other woods

Question 7

plywood cons

Answer 7

susceptible to water damage

Question 8

MDF (medium density fibreboard) definition

Answer 8

sawdust + resin/glue

Question 9

MDF cons

Answer 9

-sawdust = respiratory issues
-low strength

Question 10

MDF pros

Answer 10

-low cost (made of waste material)
-easy to shape
-can be moulded into shape

Question 11

chipboard definition

Answer 11

wood shavings + glue/resin

Question 12

chipboard cons

Answer 12

-not easy to work with; splinters/flakes due + low strength

Question 13

chipboard pros

Answer 13

-low cost (made from waste material)

Question 14

Stock forms types

Answer 14

-regular sections
-mouldings
-dowels
-sheets (2440mm x 1220mm)

Question 15

hardwood definition

Answer 15

deciduous- broad leaf + lose leaves in winter

Question 16

Oak (HW) pros

Answer 16

-excellent strength
-durable

Question 17

oak (HW) cons

Answer 17

-long time to grow; expensive
-difficult to work with

Question 18

mahogany (HW) pros

Answer 18

-easy to work with
-red colour; aesthetics

Question 19

mahogany (HW) cons

Answer 19

-endangered
-very expensive
-illegal/restricted import

Question 20

beech (HW) pros

Answer 20

-very hard

Question 21

beech (HW) cons

Answer 21

-can be expensive
-not moisture resistant

Question 22

balsa (HW) pros

Answer 22

-very light weight
-very easy to shape
-buoyant

Question 23

Balsa (HW) cons

Answer 23

-low strength/weak

Question 24

birch (HW) pros

Answer 24

-low cost
-grows quickly
-nice grain aesthetics

Question 25

birch (HW) cons

Answer 25

-low resistance to rot

Question 26

jelutong (HW) pros

Answer 26

-very easy to work with

Question 27

jelutong (HW) cons

Answer 27

-not good strength -not for structures

Question 28

hardwood list

Answer 28

-oak -mahogany -beech -balsa -birch -jelutong

Question 29

softwood definition

Answer 29

evergreen

Question 30

pine (SW) pros

Answer 30

-durable -easy to work with -low cost -fast growth

Question 31

pine (SW) cons

Answer 31

-prone to warp/crack

Question 32

cedar (SW) pros

Answer 32

-natural oils protect from water

Question 33

cedar (SW) cons

Answer 33

-more expensive

Question 34

larch (SW) cons

Answer 34

-more expensive than cedar

Question 35

larch (SW) pros

Answer 35

-tough + durable

Question 36

soft woods list

Answer 36

-pine -cedar -larch

Question 37

definition strength

Answer 37

withstanding force without bending permanently

Question 38

definition tensile strength

Answer 38

withstanding force when stretched

Question 39

definition compressive strength

Answer 39

withstanding force when being crushed

Question 40

definition durability

Answer 40

withstanding wear and tear/weathering

Question 41

definition flexibility

Answer 41

how easily a material will bend/distort

Question 42

definition elasticity

Answer 42

ability to regain shape after it has been deformed

Question 43

definition plasticity

Answer 43

changing in shape permanently without cracking or bending

Question 44

definition malleability

Answer 44

ability to be easily pressed, spread and hammered into shape (all directions apply)

Question 45

definition ductility

Answer 45

ability to be stretched and permanently deformed without breaking

Question 46

definition brittleness

Answer 46

how easily a material will break without bending (opposite of ductile)

Question 47

definition hardness

Answer 47

resistance to scratching, cutting, denting and wear

Question 48

definition work hardness

Answer 48

when the structure of the metal changes as a result of repeated hammering or strain

Question 49

definition toughness

Answer 49

resistance to sudden shock without breaking or deforming

Question 50

definition impact resistance

Answer 50

resisting denting

Question 51

definition shear

Answer 51

strong sliding forces acting opposite each other (shears)

Question 52

definition stress

Answer 52

any force acting on a material

Question 53

antonym to conductor

Answer 53

insulator

Question 54

definition electrical conductivity

Answer 54

how easily a material allows electricity to flow through it

Question 55

definition thermal conductivity

Answer 55

how easily a material allows heat to flow through it

Question 56

definition chemical resistance

Answer 56

resists chemical attack

Question 57

definition optical

Answer 57

ability to absorb/reflect light

Question 58

how do we store/access energy

Answer 58

batteries/cells, solar cells, mains electricity

Question 59

what does CNC stand for (DT)

Answer 59

computer numerical control (eg laser cutting)

Question 60

what does CAM stand for

Answer 60

computer aided manufacture

Question 61

CAD definition

Answer 61

computer aided design

Question 62

4 types of movement (DT)

Answer 62

-linear -reciprocating -oscillating -rotation

Question 63

ferrous definition

Answer 63

contains iron

Question 64

what is mild steel made of

Answer 64

-iron -0.1%-0.3% carbon

Question 65

mild steel properties

Answer 65

-tough -ductile -1400'c melt point -high tensile strength -poor corrosion resistance

Question 66

what is stainless steel made of

Answer 66

-carbon steel -10%-18% chromium -8% nickel -8% manganese

Question 67

stainless steel properties

Answer 67

-corrosion resistant -1400'c melt point -difficult to cut -durable

Question 68

what is cast iron made of

Answer 68

-iron -2%-6% carbon

Question 69

cast iron properties

Answer 69

-very hard -very brittle -excellent compressive strength -1200'c melt point

Question 70

cast iron uses

Answer 70

-manhole covers -vices

Question 71

stainless steel uses

Answer 71

-cutlery -medical equipment

Question 72

aluminium properties

Answer 72

-malleable -sacrificial oxide layer -thermal/electric conductor -660'c melt point

Question 73

aluminium uses

Answer 73

-aircraft -drink can -foil

Question 74

brass properties

Answer 74

-high corrosion resistance -excellent thermal/electric conductor -much harder than copper -900'c melt point

Question 75

what is brass made of

Answer 75

-65% copper -35% zinc

Question 76

brass uses

Answer 76

-taps -door handles

Question 77

copper properties

Answer 77

-good thermal/electric conductor -1100'c melt point

Question 78

copper uses

Answer 78

-heating pipes -saucepans