• Output

Question 1

What do output devices do?

Answer 1

• Output devices take data produced by a computer and turn it into a human readable form.

Question 2

How do operating costs of inkjet printers work?

Answer 2

• Inkjet printers are sold at below production cost.

* Cost of ink cartridges are marked up.

Question 3

How do inkjet printers work?

Answer 3

• Spraying minute dots of ink onto paper to create an image.
• Depending on the resolution of the model, number of colour cartridges used, and the quality of the paper, the final product can vary in quality.

Question 4

What are some advantages of inkjet over laser printers?

Answer 4

• Inkjets are cheaper to buy initially.

Question 5

How do dot matrix/impact printers work?

Answer 5

Print head has a matrix of pins which strike the surface of the paper through an inked ribbon to form letters.

Question 6

What are some advantages of dot matrix printers?

Answer 6

• Can operate in damp or dirty environments.

* Useful where multi part stationary is required

Question 7

What are some disadvantages to dot matrix printers?

Answer 7

• Loud
• Slow
• Final print quality is poor.
• Expensive to buy

Question 8

What are some advantages to laser printers?

Answer 8

• High quality prints
• Fast
• Reliable

Question 9

What do laser printers use?

Answer 9

Dry powdered ink called toner.

Question 10

What do 3-D printers use?

Answer 10

Plastic filament, powdered resin, ceramic or metal powder.

Question 11

What are some applications of 3-D printers in medicine?

Answer 11

• Manufacturing of prosthetic limbs

* Reconstructive or general surgery.

Question 12

How are 3-D printers advantageous in the manufacturing of prosthetic limbs?

Answer 12

• Reduction in cost of manufacturing.

* Greater accuracy in matching limb to individual patient

Question 13

How are 3-D printers advantageous in surgery?

Answer 13

• Surgeons can demo a procedure to ensure the actual surgery is more accurate
• Produce very accurate parts for surgical procedures

Question 14

How are 3-D printers advantageous in manufacturing parts & art?

Answer 14

• Very old items are likely no longer manufacturing, using existing parts as a blueprint allows it to be possible to print new components at a fraction of the cost.
• Prototyping for design, fashion and art can save huge costs

Question 15

What type of device are RFID systems?

Answer 15

Input and Output

Question 16

How do RFID chips work?

Answer 16

• The powered receiver emits radio frequency energy
• Transponder antenna in the tag becomes energised by radio waves.
• Transponder can then send data to the receiver.

Question 17

What are some examples of uses of RFID tags?

Answer 17

• Security Control points
• Shipping and supply chain tracking for goods
• Banking and fast payment systems
• As a potential replacement for barcode systems.

Question 18

What are the two types of RFID tags?

Answer 18

• Passive

* ACtive

Question 19

What are passive tags?

Answer 19

Passive transponders are those with no power source, and which rely on the radio waves from the receiver for their energy.

Question 20

What is a disadvantages of passive tags?

Answer 20

Transponders need to be placed very close to the receiver.