Technology Flashcards

(103 cards)

1
Q

Ferrous

A

Metals which contain iron, is magnetic and rusts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Nonferrous

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Alloy

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Natural-Hardwood

A

Deciduous trees
Grow slower
More expensive
More dense
Close grain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Natural-Softwood

A

Coniferous trees
Grows quicker
Less expensive
Less dense
Wide grain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Man made-manufactured boards

A

Are left over pieces of wood pressed with glue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Disadvantages of natural wood

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Advantages of man-made wood

A

-Available in large sheets
-No natural defects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Disadvantages of man-made wood

A

-Edges need to be finished
-Not as aesthetically pleasing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Strength

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Hardness

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Brittleness

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Toughness

A

The ability to resist breaking or shattering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Durability

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Ductility

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Malleable

A

The ability of a material to be hammered

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Ergonomics

A

how a product interacts with the user

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Aesthetics

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Design process steps

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Design opportunity

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Research

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Design brief

A

A short statement outlining what you hope to achieve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Specification

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Idea generation

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Development
Improve on initial ideas Planning for manufacture Creating a final idea
26
Manufacture
Making the final prototype
27
Testing and evaluation
Testing to see if the product meets the specification Evaluate to find any future improvements
28
Thermoplastic
Can be heated and shaped over and over again
29
Thermosetting
Can only be heated and shaped once
30
Hardening
(Only) high carbon steel is heated until it glows red and is quenched in clean water immediately becoming very hard but brittle
31
Heat treatment
Heating and cooling metals to improve on it physical and mechanical properties without changing shape
32
Tempering (done after hardening)
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
33
Annealing
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
34
Normalising
It’s a heat treatment process to make metal more ductile and still get hard
35
Steps of making a product
Design opportunity Research Design brief Specification Idea generation development Manufacture Testing and evaluation
36
Form
Is the appearance of the product
37
Function
The intended use of a product
38
Form follows function
Thought about form first
39
Function follows form
Thought about function first
40
CAD advantages
Easier to make changes Accurate measurements Can see all angles Share designs easy Send design straight to CAM
41
CAD disadvantages
Expensive Training required
42
CAD what it does
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
Modeling
cheap and quick model to test the function, size, preportions and if the idea works.
44
Modeling benefits
You can see the whole product Test manufacturing technique It’s quicker and cheaper than a full prototype
45
Prototype
It’s a fully functional version of a product made before manufacturing
46
Prototype benefits
Allows to test the function Identify flows before production-saves money Allows you to see how materials will preform
47
What does Working drawings do
communicates all relevant details required to manufacture a product
48
What a working drawing is
2-D line drawings displayed in orthographic with dimensions and materials
49
Line bending steps (thermoplastics only)
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
Former or jig
MDF cut to desired shape Plastic could clamp on to or in between
51
Metal bending steps
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
Vacuum forming steps
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
Blow moulding steps
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
Compress or press moulding steps
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
Laminating steps
1.cut thin strips of wood 2.put glue on the strips 3.clamp them into a mould
56
Polishing
Use polisher to make the material shiny and smoother
57
Painting
Adds colour to wood or metal
58
Water based paints
Offer no weather protection
59
Oil paints
Offer weather protection
60
Vanished
Adds clear layer for weather protection and variety of shiny finishes (Glass, satin matt)
61
Stain
Adds colour to wood but can see grain offers no protection
62
Dip coating
Adds layer of thin plastic to a piece of material
63
Dip coating offers
Weather protection Insulation Doesn’t need redone/topping up Colour Texture
64
Process of dip coating
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
Galvanising
Coat steel in a layer of zinc
66
Galvanising adds
Weather protection, doesn’t need redone
67
Process of galvanising
Prepare cleaning and smoothing Dip metal into molten zinc
68
CNC router
Produces 2D and 3D Used on foam, wood and metal Used for model making moulds
69
Laser cutter
Cuts and engraves thin sheets of plastic, metal and wood Laser beam that cuts the material and doesn’t need clamped
70
3D Printer
Plastic only 3D shapes created can do internal and external pans interlinking parts made limited to size of the bed
71
CNC milling machine
Cute wood, metal and plastic Accurate measurements Cuts complex shapes and curves in a flat piece of material
72
CAM
converts drawings created by CAD into actual products
73
Conductor
Material which allows electrical current to pass through it
74
Metal examples of a conductor
Copper, gold, graphene and graphite
75
Insulator
Material which doesn’t allow electrical current to pass through it
76
Semi-conductor
Material that had both conductive and non-conductive properties-used for resistors
77
Examples of semiconductor
Silicon Germanium
78
Input and examples
Component that detects or gets changed LDR, thermistor and switches
79
Control/process and examples
Component that controls the change or function of a circuit Transistor Thyristor
80
Output and examples
Component that changes or gives something off LED, bulb, buzzer, motor
81
Voltage
Force that makes electrons flow in a conductor
82
Current
Electrical current is a Flow of electrons
83
Resistance
Measure of how easily electrons flow through a conductor
84
Transistor
Electronic switch or an amplifier
85
Transistor legs
Collector Base ~>emitter
86
Transistors activates
When the base leg receives 0.6-0.8 volts
87
Ohms law
Voltage=current x resistance
88
Voltage
V Volts
89
Current
Amps A I
90
Resistance
Ohms Omega
91
Battery
Power source Converts chemical energy to electrical energy
92
Thermistor
Temperature dependent resistor As temp rises the resistance increases
93
Variable resistor
Adjustable resistor Increase or decrease the amount of resistance Controls brightness of a bulb and flow of electricity
94
LDR (Light Dependent Resistor)
Semiconducting Low resistance in light conditions and high resistance when it’s dark
95
Diode
Protects motors and allows current to flow in one direction
96
Resistor
Used to protect LEDs
97
Motor
Output device that produces rotary motion
98
Bulb
Output device that gives of light
99
Buzzer
Output device that gives of sound
100
LED
Diode that emits light when electrons pass through it
101
Mega (M)
1 000 000
102
Kilo (k)
1000
103
Knots
Shows where a branch used to be