Major Developments In Technology

Question 1

Microelectronics

Answer 1

Miniature electronic devices and systems facilitated by the development of the integrated circuit

Question 2

The internet of things

Answer 2

The networking of multiple micro electronic devices using Wi-Fi and the Internet

Question 3

Thermionic valves

Answer 3

Very large but facilitated development of electronic products such as tvs and radios

Question 4

When were transistors developed

Answer 4

1940

Question 5

Intergrated circuits

Answer 5

Multiple transistors and other components on a silicone chip - very small

Question 6

Electronics at start of 19th century

Answer 6

Basic electrical batteries and circuits

Question 7

Improvements caused y the development of intergrated circuits

Answer 7

Research
Communication
Technical drawings
Meetings
Prototypes and models
Testing products
Manufacturing processes

Question 8

Development of the radio

Answer 8

1930s hand crafted with thermionic valves
1940s made from thermosetting plastics
1950s development of transistors- smaller and amplifies radio signal
1960s fashion changed away from wooden look and improved technology meant clearer sound
1970s injection moulded bodies brought down costs
80s+90s silicon chip developed, lighter weight, lcd screens, improved egonomics
Now dab

Question 9

Electro hydraulic forming

Answer 9

Forming complex sheet metal using a single sided forme, done by a shockwave generated by an electrical spark in a tank of water - replaces similar processes that require explosives

Question 10

Fibre injection moulding

Answer 10

Uses glass or carbon fibre pellets. Used in automotive industry

Question 11

Physical vapour deposition

Answer 11

A replacement for electroplating. Works by heating base material so it vapourises when then passes through a vacuum to condense on the target material leaving a thin layer of material

Question 12

Why is glutamate stronger than using solid timber

Answer 12

The careful choice of laminates enables the natural defects found in timber such as knots to be almost eliminated.

Question 13

What is a sintering process

Answer 13

It is used in precious metal clay after it has been shaped. It raises the temperature of the clay into the particles fuse and the binding medium is burned off.

Question 14

What are nanomaterials used for

Answer 14

Additives in sunscreen, cosmetics and nano electronic devices

Question 15

Example of a nano material

Answer 15

Graphing, it consists of a two dimensional form of carbon with a honeycomb like atomic structure. If it is rolled into a tubular form, it displays highly desirable levels of tense strength and hardness combined with heat resistance and high electrical conductivity.

Question 16

Disadvantages of nanomaterials

Answer 16

Lack of recyclability and potential toxicity of some nano materials

Question 17

Why is electrohydraulic forming desirable?

Answer 17

It only needs a one-sided former.
It can produce deep complex and find detailed shapes.
It can deal with a range of materials and thicknesses.
It is a single stage process.
It is very fast.
Material is easily distributed avoiding potential weak points

Question 18

Advantages of laser beam welding

Answer 18

What’s a wide range of materials and is capable of welding dissimilar materials?
The area affected by heat from the laser is narrow therefore minimising distortion.
The world is smooth enough to require no further finishing processes.
It is accurate.
To use filler.
Small thin components can be welded with less likelihood of damage.

Question 19

Disadvantages of laser beam welding

Answer 19

Hi capital costs.
The need for a clean environment.
Additional health and safety considerations