Output Devices

Question 1

Peripheral

Answer 1

An external device that is connected to a computer

Question 2

Soft copy

Answer 2

Data and information that is virtual

Question 3

Hard copy

Answer 3

Data and information that is physical

Question 4

Footprint

Answer 4

The space taken up by peripheral

Question 5

Pixel (3 points)

Answer 5

Short for picture element; it is illuminated dot; many pixels together form an image

Question 6

Resolution

Answer 6

The number of pixels in a display

Question 7

Display

Answer 7

An electronic device that outputs information via a screen or projection

Question 8

List primary colours

Answer 8

Red,Green,Blue

Question 9

Colour depth

Answer 9

The degree to which a particular colour can be represented

Question 10

List 3+ and 2- of flat panel displays

Answer 10

+ High resolution
+ Made be at a size ideal for a portable device
+ Low energy requirements
- Easily damaged
- Dead pixels that will spoil the display

Question 11

Two types of flat panel displays

Answer 11

LCD - Liquid crystal displays

LED - Light emitting diode

Question 12

How does an LCD work?

Answer 12

Separate RGB pixels arranged in tiny blocks. The crystals can be made solid or transparent by altering the current

Question 13

When the crystals are liquid….

Answer 13

Light can go through and the pixel is illuminated

Question 14

What is more advanced LED/LCD

Answer 14

LED

Question 15

How does an LED work?

Answer 15

Like LCDs but pixels are backlit with light emitting diodes. LED brighter and direct light

Question 16

What has an uneven brightness across the screen

Answer 16

LED

Question 17

What is thinner and lighter

Answer 17

LED

Question 18

Unless viewing straight may be hard to see

Answer 18

LCD

Question 19

How does a LCD processor work?

Answer 19

3 separate glass panels for each RGB colour, as the light passes individual pixels can be opened to allow the light trough.

Question 20

When are LCD projectors useful?

Answer 20

When contrast and brightness are important

Question 21

How does a DLP projector work?

Answer 21

Uses millions of tiny mirrors to reflect light towards the projection lens

Question 22

Compare the image of a DLP projector to a LCD projector

Answer 22

DLP - excellent colour representaation, less contrast and brightness to LCD.

Question 23

Which projector is smaller?

Answer 23

DLP

Question 24

What base colours do printers use?

Answer 24

1) Cyan
2) Magenta
3) Yellow
4) Black

Question 25

Types of printers (3)

Answer 25

1) Inkjet printer 2) Laser printer 3) 3D printer

Question 26

How does an inkjet printer work?

Answer 26

Ink is sprayed on the paper through the microscopic nozzles

Question 27

Advantages of inkjet printers (2)

Answer 27

1) Cheaper than other printers | 2) Excellent image quality when using photography paper

Question 28

Disadvantages of inkjet printers (4)

Answer 28

1) Use a lot of ink which is expensive 2) Poor image quality on normal paper 3) Difficult to print on both sides 4) Slow in printing

Question 29

How does a laser printer work?

Answer 29

Use laser to create static electricity where the tonner sticks. Uses fusing element to bond tonner to the page

Question 30

How do you call laser printer powder?

Answer 30

Tonner

Question 31

Advantages of laser printers (4)

Answer 31

1) Cheap to run as they cartridges last longer 2) Text printing is good quality 3) Quick at printing 4) Duplex printing reduced paper cost

Question 32

Disadvantages of laser printers (3)

Answer 32

1) Expensive to buy (laser technology) 2) Images on photographic paper is worse than on inkjet 3) Bigger than inkjet

Question 33

What does CAD stand for?

Answer 33

Computer aided design

Question 34

CAD

Answer 34

Software that allows a user to design and create an image of an object

Question 35

What does CAM stand for?

Answer 35

Computer aided manufacturing

Question 36

CAM

Answer 36

A computer controls machinery to manufacture an object

Question 37

What does CNC stand for?

Answer 37

Computer numerical control

Question 38

CNC

Answer 38

The method of control used by CAM

Question 39

How does a 3D printer work?

Answer 39

Digital object is split into tiny horizontal layers. Printer uses material to slowly print each layer on top of the other

Question 40

What materials can a 3D printer use? (3)

Answer 40

1) Polymers 2) Plastic 3) Acrylic

Question 41

Advantages of CAM (3)

Answer 41

1) Items manufactured to a higher precision than by hand 2) High production quality can be kept 3) High quality bespoke items and prototypes

Question 42

Disadvantages of CAM (3)

Answer 42

1) Training is required to use CAM 2) Bespoke items and prototypes may be expensive to produce 3) CAM is expensive to introduce because of hardware and software costs involved

Question 43

What does DAC stand for?

Answer 43

Digital to analogue convertor

Question 44

DAC

Answer 44

A device that converts digital signals to analogue

Question 45

Advantages of a speaker (3)

Answer 45

1) Variety information to be provided to the user 2) Aid disabled user when operating a device 3) Warn large number of people (emergency)

Question 46

Disadvantages of a speaker (2)

Answer 46

1) Built-in speakers - low quality | 2) Sound may disturb the others