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October Assessment > Technology > Flashcards

Technology Flashcards

1
Q

Ferrous

A

Metals which contain iron, is magnetic and rusts

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2
Q

Nonferrous

A

Metals which don’t contain iron so are not Magnetic and don’t rust

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3
Q

Alloy

A

A mixture of metals with other elements, to improve upon its properties or working performance

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4
Q

Natural-Hardwood

A

Deciduous trees
Grow slower
More expensive
More dense
Close grain

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5
Q

Natural-Softwood

A

Coniferous trees
Grows quicker
Less expensive
Less dense
Wide grain

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6
Q

Man made-manufactured boards

A

Are left over pieces of wood pressed with glue

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7
Q

Disadvantages of natural wood

A

-natural defects
-knots
-warps, twists, bows and splits
-limited by the size of the tree

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8
Q

Advantages of man-made wood

A

-Available in large sheets
-No natural defects

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9
Q

Disadvantages of man-made wood

A

-Edges need to be finished
-Not as aesthetically pleasing

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10
Q

Strength

A

force is applied to material without it bending, shattering and deforming in anyway

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11
Q

Hardness

A

The ability of a material to resist scratching from wear to tear, bending and indentation

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12
Q

Brittleness

A

Materials can not withstand much stretching and will crack, brake and change shape

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13
Q

Toughness

A

The ability to resist breaking or shattering

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14
Q

Durability

A

The ability to withstand repeated use, wear and tear, weathering and corrosive attack

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15
Q

Ductility

A

The ability of a material to change shape (usually stretching)

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16
Q

Malleable

A

The ability of a material to be hammered

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17
Q

Ergonomics

A

how a product interacts with the user

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18
Q

Aesthetics

A

It’s the appearance of the product (colour, shape and texture)

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19
Q

Design process steps

A

Design opportunity
Research
Design brief
Specification
Idea generation
Development
Manufacture
Testing and evaluation

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20
Q

Design opportunity

A

A problem or scenario you wish to solve by designing a product

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21
Q

Research

A

Looking at existing solutions to identify areas of improvement or design strength

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22
Q

Design brief

A

A short statement outlining what you hope to achieve

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23
Q

Specification

A

A list of specific requirements, the product will do, have or be

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24
Q

Idea generation

A

Coming up with initial ideas and a lot of ideas should be considered

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25
Q

Development

A

Improve on initial ideas
Planning for manufacture
Creating a final idea

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26
Q

Manufacture

A

Making the final prototype

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27
Q

Testing and evaluation

A

Testing to see if the product meets the specification
Evaluate to find any future improvements

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28
Q

Thermoplastic

A

Can be heated and shaped over and over again

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29
Q

Thermosetting

A

Can only be heated and shaped once

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30
Q

Hardening

A

(Only) high carbon steel is heated until it glows red and is quenched in clean water immediately becoming very hard but brittle

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31
Q

Heat treatment

A

Heating and cooling metals to improve on it physical and mechanical properties without changing shape

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32
Q

Tempering (done after hardening)

A

Used to increase toughness of iron based alloys

Heating the metal to some temperature below the critical point for a certain period of time after allowing it to cool in still air

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33
Q

Annealing

A

A metal is heated to a specific temperature/colour and then allow to cool slowly which softens the metal making it easier to cut and shape

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34
Q

Normalising

A

It’s a heat treatment process to make metal more ductile and still get hard

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35
Q

Steps of making a product

A

Design opportunity
Research
Design brief
Specification
Idea generation
development
Manufacture
Testing and evaluation

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36
Q

Form

A

Is the appearance of the product

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37
Q

Function

A

The intended use of a product

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38
Q

Form follows function

A

Thought about form first

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39
Q

Function follows form

A

Thought about function first

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40
Q

CAD advantages

A

Easier to make changes
Accurate measurements
Can see all angles
Share designs easy
Send design straight to CAM

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41
Q

CAD disadvantages

A

Expensive
Training required

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42
Q

CAD what it does

A

Creates drawings or models on the computer

Let’s you see a product in detail, test the product on screen and add realistic appearances

43
Q

Modeling

A

cheap and quick model to test the function, size, preportions and if the idea works.

44
Q

Modeling benefits

A

You can see the whole product

Test manufacturing technique

It’s quicker and cheaper than a full prototype

45
Q

Prototype

A

It’s a fully functional version of a product made before manufacturing

46
Q

Prototype benefits

A

Allows to test the function

Identify flows before production-saves money

Allows you to see how materials will preform

47
Q

What does Working drawings do

A

communicates all relevant details required to manufacture a product

48
Q

What a working drawing is

A

2-D line drawings displayed in orthographic with dimensions and materials

49
Q

Line bending steps (thermoplastics only)

A

1.Mark bend line-dashed line-steel ruler, tri square, marker

2.the dashed line gets lined up with the wire of the line bender

3.wait until the plastic is heated and flexible

4.bend to desired angle

5.let it cool while holding it in the angle

50
Q

Former or jig

A

MDF
cut to desired shape
Plastic could clamp on to or in between

51
Q

Metal bending steps

A

1.mark the bend line-dashed line-scriber, blue marker, engineer square

2.place into vice

3.use a scrap block of wood and a mallet and tap metal until it reaches desired angle

52
Q

Vacuum forming steps

A

1.get the mould and place it on top then lower it down

2.get the plastic and place it on top then lock it in

3.start to heat the plastic when it’s floppy bring the mold up and activate the vacuum pump

4.let it cool the take it out and remove the mould

53
Q

Blow moulding steps

A

1.plastic is inserted into the mould

2.is squeezed by mould and air is blown into it

3.it expands to fill the mould

4.finished product

54
Q

Compress or press moulding steps

A

1.a mould is made in two halves
2.sheet of plastic is placed between
3.then heated and pressure applied
4.enabling the plastic to take a new shape

55
Q

Laminating steps

A

1.cut thin strips of wood
2.put glue on the strips
3.clamp them into a mould

56
Q

Polishing

A

Use polisher to make the material shiny and smoother

57
Q

Painting

A

Adds colour to wood or metal

58
Q

Water based paints

A

Offer no weather protection

59
Q

Oil paints

A

Offer weather protection

60
Q

Vanished

A

Adds clear layer for weather protection and variety of shiny finishes
(Glass, satin matt)

61
Q

Stain

A

Adds colour to wood but can see grain offers no protection

62
Q

Dip coating

A

Adds layer of thin plastic to a piece of material

63
Q

Dip coating offers

A

Weather protection Insulation Doesn’t need redone/topping up
Colour Texture

64
Q

Process of dip coating

A

1.Prepare the surface by cleaning away any oil/grease
2.Heat the metal
3.dip heated metal into plastic powder and remove
4.allow metal to melt/cool

65
Q

Galvanising

A

Coat steel in a layer of zinc

66
Q

Galvanising adds

A

Weather protection, doesn’t need redone

67
Q

Process of galvanising

A

Prepare cleaning and smoothing
Dip metal into molten zinc

68
Q

CNC router

A

Produces 2D and 3D

Used on foam, wood and metal
Used for model making moulds

69
Q

Laser cutter

A

Cuts and engraves thin sheets of plastic, metal and wood
Laser beam that cuts the material and doesn’t need clamped

70
Q

3D Printer

A

Plastic only

3D shapes created can do internal and external pans interlinking parts made limited to size of the bed

71
Q

CNC milling machine

A

Cute wood, metal and plastic
Accurate measurements
Cuts complex shapes and curves in a flat piece of material

72
Q

CAM

A

converts drawings created by CAD into actual products

73
Q

Conductor

A

Material which allows electrical current to pass through it

74
Q

Metal examples of a conductor

A

Copper, gold, graphene and graphite

75
Q

Insulator

A

Material which doesn’t allow electrical current to pass through it

76
Q

Semi-conductor

A

Material that had both conductive and non-conductive properties-used for resistors

77
Q

Examples of semiconductor

A

Silicon
Germanium

78
Q

Input and examples

A

Component that detects or gets changed
LDR, thermistor and switches

79
Q

Control/process and examples

A

Component that controls the change or function of a circuit
Transistor
Thyristor

80
Q

Output and examples

A

Component that changes or gives something off
LED, bulb, buzzer, motor

81
Q

Voltage

A

Force that makes electrons flow in a conductor

82
Q

Current

A

Electrical current is a Flow of electrons

83
Q

Resistance

A

Measure of how easily electrons flow through a conductor

84
Q

Transistor

A

Electronic switch or an amplifier

85
Q

Transistor legs

A

Collector
Base
~>emitter

86
Q

Transistors activates

A

When the base leg receives 0.6-0.8 volts

87
Q

Ohms law

A

Voltage=current x resistance

88
Q

Voltage

A

V
Volts

89
Q

Current

A

Amps
A
I

90
Q

Resistance

A

Ohms
Omega

91
Q

Battery

A

Power source
Converts chemical energy to electrical energy

92
Q

Thermistor

A

Temperature dependent resistor

As temp rises the resistance increases

93
Q

Variable resistor

A

Adjustable resistor
Increase or decrease the amount of resistance
Controls brightness of a bulb and flow of electricity

94
Q

LDR (Light Dependent Resistor)

A

Semiconducting
Low resistance in light conditions and high resistance when it’s dark

95
Q

Diode

A

Protects motors and allows current to flow in one direction

96
Q

Resistor

A

Used to protect LEDs

97
Q

Motor

A

Output device that produces rotary motion

98
Q

Bulb

A

Output device that gives of light

99
Q

Buzzer

A

Output device that gives of sound

100
Q

LED

A

Diode that emits light when electrons pass through it

101
Q

Mega (M)

A

1 000 000

102
Q

Kilo (k)

A

1000

103
Q

Knots

A

Shows where a branch used to be

October Assessment (14 decks)

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