Mr Ridley 😍😍

Question 1

Why are electronics drawn as symbols?

Answer 1

Drawn as symbols for easy recognition worldwide

Question 2

How do speakers work?

Answer 2

A diaphragm is moved with electromagnets. This makes the air move, creating sound waves

Question 3

Why are exploded drawings used

Answer 3

Exploded drawings are used to show positions of parts relative to each other

Question 4

Where are exploded diagrams used?

Answer 4

Exploded diagrams are often supplied with products to enable consumer to identify and order parts

Question 5

How have new technologies occurred?

Answer 5

Through improvements in materials and manufacturing processes

Question 6

3 examples of new technologies in phones

Answer 6

Lithium ion batteries
Touch screens
Cameras with high-quality image

Question 7

Rechargeable batteries

Answer 7

Lithium ion
Small and lightweight
Around 1000 recharges

Question 8

Touch screens

Answer 8

Mutual Capacitance Screen; MCS

3 points of contact

Question 9

What to do with rechargeable batteries?

Answer 9

Contain harmful metals
Should never be thrown away
Either: recycle or return to manufacturer
WEEE directive

Question 10

Aluminium

Answer 10

Light
Malleable 
Conductive
Corrosion resistant
Expensive
Difficult to weld

Question 11

Stainless steel

Answer 11

Ferrous
Tough
Malleable
Corrosion Resistant
Expensive

Question 12

What’s an alloy?

Answer 12

An alloy is a mixture of at least 2 elements where at least 1 is a metal

Question 13

Why are alloys used

Answer 13

Alloys have properties superior to the base metals

Question 14

What are electrical components assembled on?

Answer 14

Electrical components are assembled on Printed Circuit Board

Question 15

Describe soldering on Printed Circuit Board?

Answer 15

Soldering iron touches the track
Next, solder is added and touches the copper track
The result is a smooth shiny finish

Question 16

What is the frame of the phone made from?

Answer 16

Thermoplastic or an alloy

Question 17

Where would injection moulding be used in a phone?

Answer 17

Back cover

Question 18

Advantages of injection moulding

Answer 18

Complex shapes
Produced in high volumes
Wide variety of colours
Other details can be added to injection moulded parts, unlike with vacuum forming

Question 19

Disadvantages of injection moulding

Answer 19

Expensive setup costs

Some shapes are impossible

Question 20

3 things which make thermoplastics good to use

Answer 20

Can be recycled
Electrical insulators
Good surface finish

Question 21

Why is HIPS used?

Answer 21

Can withstand high impact
Tough
Won’t bend
Can be recycled

Question 22

Why is ABS used for the exterior of the case?

Answer 22

Tougher than HIPS
Can withstand higher impacts than HIPS
Durable
Resists chemicals
Lightweight
BUT expensive
Glossy finish

Question 23

How is CNC used?

Answer 23

To produce complex shapes in metals from very accurate CAD drawings for phone cases

Question 24

Describe Press Forming

Answer 24

Thin sheet metal pressed using dies and formers

Question 25

Describe spot welding

Answer 25

2 pieces of sheet metal are held between electrodes. An electric current is passed between them. Steel is simultaneously heated and pressed together forming a welded joint.

Question 26

What would die casting be used for?

Answer 26

Making the phone case

Question 27

Anodising

Answer 27

A tough, hard-wearing coating of aluminium. Can come in a wide range of colours

Question 28

What does Bluetooth do?

Answer 28

Bluetooth allows people to connect and communicate with a range of nearby devices