Keywords 7 - Output Devices

Question 1

Peripheral

Answer 1

An external device that is connected to a computer

Question 2

Soft copy

Answer 2

Virtual data and information

Question 3

Hard copy

Answer 3

Physical data and information

Question 4

Footprint

Answer 4

The space taken up by a peripheral

Question 5

Pixel

Answer 5

Means “picture element”; an illuminated dot - many pixels together form a display

Question 6

Resolution

Answer 6

The number of pixels in a display

Question 7

DPI (Dots Per Inch)

Answer 7

Resolution is measured in dots per inch (DPI)

Question 8

CAD (Computer Aided Design)

Answer 8

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

Question 9

CAM (Computer Aided Manufacturing)

Answer 9

A computer controls machinery used to manufacture an object

Question 10

CNC (Computer Numeric Control)

Answer 10

CAM uses CNC to controls the machinery to achieve precision manufacturing

Question 11

DAC (Digital to Analogue Convertor)

Answer 11

A device that converts digital signals to analogue signals

Question 12

Flat panel display

Answer 12

Provides high resolution, bright, flicker-free displays

Question 13

LCD (Liquid Crystal Display)

Answer 13

Provides a low energy display made up of separate red, green and blue coloured crystals arranged together in tiny blocks

Question 14

LED (Light Emitting Diode) display

Answer 14

A more advanced version of a LCD display - pixels are backlit with LEDs

Question 15

LCD projector

Answer 15

Light is passed through 3 separate glass panels (red, green and blue) - for each pixel appropriate colours are blocked or open

Question 16

DLP projector

Answer 16

Millions of tiny mirrors are used to reflect light on to the projection lens.

Question 17

Inkjet printer

Answer 17

Cheap but low quality printing for home use. Ink is sprayed on to the paper with many nozzles.

Question 18

Laser printer

Answer 18

Expensive but high quality printing for commercial use. A powder called toner is used to print the image.

Question 19

3D printer

Answer 19

CAD files are used to create 3D objects, created from many very thin horizontal layers. Polymers, acrylic or plastic are used to create the object, one layer at a time from the bottom.

Question 20

2D CAM machine

Answer 20

A 2D cutting machine e.g. laser cutter, blade cutter (e.g. vinyl cutter) or water jet cutter

Question 21

3D CAM machine

Answer 21

3D cutters cut a 3D object from materials such as wood, MDF, wax, plastic and acrylic. The end result is similar to 3D printing but created in a different way.

Question 22

Speaker

Answer 22

Output device to output sound

Question 23

Actuator

Answer 23

A mechanical output device that produces movement. Actuators can rotate, open, close, push and pull an object.

Question 24

Headphone

Answer 24

Output device to output sound without disturbing other people