tech gcse yr 11 Flashcards

1
Q

3 methods of communication

A

-freehand sketches
-physical mock ups
-mood boards

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2
Q

what is a thermosetting plastic

A

are plastics do not soften on heating

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3
Q

4 thermosetting plastics

A

melamine
polyester resin
epoxy resin
urea formaldehyde

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4
Q

melamine 3 properties

A

-flame resistant
-food hygienic
-electrical insulator

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5
Q

melamine 3 applications

A

-kitchen worktops
-welding gloves
-ashtrays

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6
Q

polyester resin 3 properties

A

-adhesive properties
-electrical insulator
-resistance to water absorption

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7
Q

polyester resin 3 applications

A

-boats
-car bodies
-suitcases

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8
Q

epoxy resin 3 properties

A

-electrical insulator
-adhesive properties
-resistance to water absorption

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9
Q

epoxy resin 3 applications

A

-paints
-coating electrical components
-adhesives

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10
Q

urea formaldehyde 3 properties

A

-adhesive properties
-electrical insulator
-resistance to water absorption

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11
Q

urea formaldehyde 3 aplication

A

-Electrical fittings
-Door handles
-Adhesives

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12
Q

what is a thermoplastic

A

can be heated and reshaped many times

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13
Q

5 thermoplastics

A

-ABS
-PVC
-Nylon
-HIPS
-acrylic

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14
Q

acrylic 3 properties

A

-Coloured or clear
-Relatively hard and durable
-Good electrical insulator

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15
Q

acrylic 3 applications

A

-visors,
-road signs
-bathtubs

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16
Q

HIPS 3 properties

A
  • durable
    -Easy to cut
    -Food hygienic (natural white)
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17
Q

HIPS 3 applications

A

-Disposable plates
-cups
-toys

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18
Q

ABS 3 properties

A

-durable
-Easy to cut
-chemical resistance

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19
Q

ABS 3 applications

A

-Keyboards
-air plane trays
-lego

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20
Q

PVC 3 properties

A
  • durable
    -electrical insulator
  • flame resistance
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21
Q

PVC 3 applications

A

-pipes
-credit cards
-electrical cables

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22
Q

nylon 3 properties

A

-strong
-durable
-Self lubricating

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23
Q

nylon 3 applications

A

-Gears
-airbags
-umbrellas

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24
Q

name 3 hardwoods

A

-beech
-mahogany
-oak

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25
Q

beech 3 properties

A

-Light in colour
- durable.
- easy to work

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26
Q

beech 3 applications

A

-furniture
-toys
-tool handles

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27
Q

mahogany 3 properties

A

-easy to work
-reddish brown
-expensive.

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28
Q

mahogany 3 applications

A

-indoor furniture
-shop fittings
-veneers.

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29
Q

oak 3 properties

A

-light in colour
-Hard to work
-good appearance.

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30
Q

oak 3 applications

A
  • boats,
    -beams
    -veneers.
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31
Q

name 2 softwoods

A

-pine
-cedar

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32
Q

pine 3 properties

A

-Knot free.
-Expensive.
-Pale yellow i

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33
Q

pine 2 applications

A

-knot free furniture
-doors and staircases.

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34
Q

cedar 3 properties

A

-A pale yellow-
-fine texture.
-Light weight

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35
Q

cedar 3 applications

A

-furniture
-boats
-veneers

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36
Q

name 4 manufactured boards

A

-plywood
-chipboard
-MDF
-veneered manu boards

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37
Q

MDF 3 properties

A

-Smooth, even surface.
-Easily machined
-water and fire resistant forms.

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38
Q

MDF 2 applications

A

-Furniture
-interior panelling

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39
Q

Plywood 2 properties

A

-A very strong
-layers glued at 90 degrees to each other.

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40
Q

plywood 2 applications

A

-furniture
-boat building

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41
Q

chipboard 3 properties

A

-chips of wood glued together. –veneered
-covered in plastic laminate.

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42
Q

chipboard 2 applications

A

-furniture
-DIY work

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43
Q

name 3 ferrous metals

A

-stainless steel
-carbon steel
-mild steel

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44
Q

name 3 non ferrous metals

A

-aluminium
-brass
-copper

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45
Q

stainless steel 1 property

A

Iron, carbon, nickel and chromium

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46
Q

stainless steel 2 applications

A

-cutlery
-surgery tools

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47
Q

carbon steel 1 property

A

-made of carbon and iron

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48
Q

carbon steel 2 applications

A

-cutting tools
-drill bits

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49
Q

mild steel 2 properties

A

-made of carbon and iron
-malleable

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50
Q

mild steel 2 applications

A

-nails
-screws

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51
Q

why do we use alloying

A

to improve metals properties

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52
Q

what is graphene

A

allotrope of carbon

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53
Q

graphene 3 properties

A

-strong
-flexible
-good conductor

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54
Q

graphene 2 applications

A

-solar cells
-battries

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55
Q

annealing process

A

-metal is heated at a specific temperature

-for a set period of time

-leave to cool very slowly

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56
Q

normalising process

A

-same as annealing
-only for ferrous metals

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57
Q

tempering process

A

-heated under its critical point temperature

-then air-cooled

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58
Q

hardening

A

-heat with a torch until cherry red

-quickly cooling by quenching in cold water

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59
Q

what does annealing do to a metal

A

-softens metal
-making it more malleable

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60
Q

what does normalising do to a metal

A

-makes it tough
-making it more ductile

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61
Q

what does tempering do to a metal

A

-makes it less hard
-makes it more tough

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62
Q

what does hardening do to a metal

A

-makes it hard
-more brittle

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63
Q

vacuum forming process (8)

A

-put mould in machine

-put plastic in machine, clamped air tight

-heat plastic

-raise mould

-vacuum sucks air out

-wrapping the plastic around mould

-let it cool

-remove mould

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64
Q

line bending process (3)

A

-mark a dash line

-use a line bender or strip heater to heat area

-bend to desired angle

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65
Q

metal folding process

A

-mark a dash line

-line up the dash line with the top of vice or folding bar

-use scrap wood and a mallet to press metal to desired angle

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66
Q

tenon saw use

A

cutting straight lines in wood

67
Q

scroll and coping saw use

A

cutting curved lines in thin pieces of plastic and wood

68
Q

hack saw use

A

cut through plastic, metals and wood

69
Q

pillar drill use

A

Used to drill larger pieces of material quickly and easily.

thicker materials and/or deeper holes.

70
Q

cordless drill use

A

can be used as screw-drivers

71
Q

flat drill bit use

A

cut clean flat bottomed holes.

72
Q

forstner bit use

A

cut clean flat bottomed holes.

73
Q

counter sunk bit use

A

to ensure that countersunk screws sit flush against the surface

74
Q

hole cutter bit use

A

to cut holes with a larger diameter than a usual drill bit

75
Q

claw hammer use

A

remove nails/screws

76
Q

pin hammer use

A

knocking in small very small nails and panel pins

77
Q

ball peen hammer use

A

striking punches and chisels

78
Q

hand plane use

A

smooths surface of wood

79
Q

chisel use

A

carving, cutting, shaping hard materials

80
Q

pencil use

A

mark out

81
Q

steel rule

A

to measure and draw straight lines

82
Q

engineers square

A

to mark out metal pieces 90 degrees from the edge

83
Q

sliding bevel

A

line is marked across the piece of wood

84
Q

odd leg calipers

A

to scribe a line at a set distance from the edge of piece

85
Q

try square

A

marking out at 90 degrees to an edge

86
Q

centre punch

A

used to create a drill point

87
Q

spring dividers

A

Used to help scribe an arc or a circle on material

88
Q

marking knife

A

cuts grain of wood

89
Q

marking gauge

A

to mark a line parallel to a straight edge

90
Q

bradawl

A

to indent wood

91
Q

engineer markers blue

A

used to mark out metal

92
Q

bandfacer

A

to smooth the edges

93
Q

pedestal polisher

A

to shine and smooth

94
Q

milling machine

A

removes material from a piece

95
Q

lathe

A

to create cylindrical components from materials

96
Q

features of soft soldering 3

A

-lowest temperature
-weakest method
-uses dissimilar metals

97
Q

features of brazing 1

A

-uses dissimilar metals

98
Q

features of welding

A

-highest temperature
-strongest method
-steel only

99
Q

what can you use to join plastic

A

tensol cement

100
Q

wasting of wood

A

-drill
-saw

101
Q

wasting of plastics

A

-saw
-drill

102
Q

wasting of wood

A

-saw
-drill
-chisel

103
Q

what are templates used for

A

to help ensure that information is placed correctly.

104
Q

what are jigs used for

A

to ensure the process can be repeated accurately and to a high quality

105
Q

how to prepare metal

A

clean in by using wire wool then a file and then wet and dry paper

106
Q

how to prepare wood

A

sand it

107
Q

reasons for finishing wood
function
aesthetic
ergonomic

A

function- protection
aesthetic-enhances appearance
ergonomic-change texture

108
Q

reasons for finishing metal
function
aesthetic
ergonomic

A

function- prevents corrosion
aesthetic- enhances appearance
ergonomic-prevents wear

109
Q

what is a smart material

A

a material whose physical properties change in response to an input

110
Q

two examples of smart materials

A

self cleaning windows
thermochromic pigments

111
Q

2 advantages of CAD
computer aided design

A

-consistent high quality drawing

-Designs can be viewed from all angles and with a range of materials

112
Q

2 disadvantages of CAD
computer aided design

A

-expensive to set up
-needs a skilled workforce

113
Q

2 advantages of CAM
computer aided manufacture

A

-Fast and accurate production
-Machines can run constantly

114
Q

2 disadvantages of CAM
computer aided manufacture

A

-expensive

-Computers and machines can fail

115
Q

CAM machines 3

A

-laser cutter
-milling machine
-3D printers

116
Q

how to make PCB boards (7)

A

-design PCB layout

-use UV light box to transfer the layout

-develop the layout using sodium hydroxide or developer

-rinse with water

-etch away unwanted cooper in an etch tank with ferric chloride

-rinse with water

  • drill holes in a PCB drill
117
Q

2 safety precautions for making PCB board

A

-dont look at UV
-rubber gloves for etching

118
Q

reasons for using PCB

A

make the electrical connections connect the components together.

119
Q

example of electronic control systems 3

A

circulation pumps
compressors
manufacturing systems

120
Q

current units

A

amps

121
Q

voltage units

A

volts

122
Q

resistance units

A

ohms

123
Q

OHMS law

A

V=IxR

124
Q

V=
I=
R=

A

Volts
Amps
Ohms

125
Q

define conductor

A

let electricity pass through them

126
Q

define insulator

A

does not let electricity pass through them

127
Q

define semiconductor

A

will only allow electricity to move easily through it under some conditions

128
Q

3 examples of conductors

A

copper
gold
silver

129
Q

3 examples of insulators

A

plastic
rubber
wood

130
Q

3 examples of semiconductors

A

arsenic
boron
carbon,

131
Q

what is meant by the term resistance

A

opposition to the flow of current

132
Q

what is the use of resistors in circuits

A

to control the flow of electric current

133
Q

toggle switch description

A

-simple on/off switch

134
Q

rocker switch description

A

-switch that has a piece which rocks back and forth in response to pressure to open and close a circuit

135
Q

slide switch description

A

switch that is a slider that slides from position to position

136
Q

micro switch description

A

can switch fully open or closed in response to small movements.

137
Q

membrane switch

A

-thin plastic layers with conductor tracks printed on

138
Q

why do we use potential dividers to control voltage in circuits

A

To generate an adjustable potential difference

139
Q

how do resistors protect LED

A

limits the current to the LED which stops it from getting too much current

140
Q

function of a thyristor

A

electronic component that can
be used to create a latching circuit

141
Q

function of a transistor

A

controlls the flow of current

142
Q

hazards of producing electric circuits with PCB or breadboards

A

Resistors +semiconductors overheat,

capacitors pop

too much voltage can result in shock

143
Q

2 examples of mechanical control systems

A

-pulleys
-levers

144
Q

4 types of motion

A

-rotary
-linear
-oscillating
-reciprocating

145
Q

3 examples of rotary motion

A

car wheel
gears
spinning top

146
Q

1 example of linear motion

A

-train

147
Q

2 examples of oscillating motion

A

-swing
-pendulum

148
Q

2 examples of reciprocating motion

A

-sliding door
-pump

149
Q

hazrds of mechanical control systems

A

slippery surface

150
Q

what is a pneumatic system

A

a system that uses compressed air to transmit and control energy

151
Q

4 examples of pneumatic system

A

Air brakes
Dentistry
Pneumatic silencers
Brakes on buses and trucks

152
Q

what does the term instroke mean

A

the internal spring returns the piston rod to its retracted position

153
Q
A
153
Q
A
153
Q
A
154
Q

what does the term outstroke mean

A

compressed air entering through a port at one end of the cylinder extends the piston rod

155
Q

function of a 3/2 valve

A

to control the single acting cylinder

156
Q
A
156
Q
A
157
Q

explain use of shuttle valve

A

ensure that the compressed air is only able to flow in one direction

157
Q

describe how a flow regulator is used for speed control

A

reduces and restricts the amount of flow

157
Q

hazards of pneumatic

A

pressure hazards

158
Q

3 example of computer control applications

A

Washing machines.
Microwaves.
Dishwashers.

159
Q
A