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Application MICR Touchscreen Sensor

Reading numbers found on a cheque
Inputting the temperature directly in an
industrial process
Selecting a choice on an ATM
Inputting moisture levels in a greenhouse
directly
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· What is meant by the two terms ‘OCR’ and ‘OMR’?
· OCR………………………………………………………………………………
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· OMR………………………………………………………………………………
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[4 marks]
· Compare the relative advantages and disadvantages of using OCR and OMR as
a method of inputting data from a paper questionnaire.
OCR OMR
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[4 marks]
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· A supermarket uses barcodes on all its items. When a customer goes to check
out, a number of input and output devices may be used. Name two input devices
and two output devices. Give different use for each named device.
Input device 1 …………………………………………………………………………
Use…………………………………………………………………………………………
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Input device 2 …………………………………………………………………………
Use…………………………………………………………………………………………
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Output device 1 …………………………………………………………………………
Use…………………………………………………………………………………………
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Output device 2 …………………………………………………………………………
Use…………………………………………………………………………………………
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· Give two advantages to the supermarket manager and two advantages to
customers of using barcodes on all items.
Manager
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Customer
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· This barcode is known as a QR code:

· What does ‘QR’ mean? ……………………………………………………..[1 mark]

· Give two benefits of using QR codes.
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· Explain how a tourist could use QR codes at an airport to help plan their holiday.
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· 3-D printers use various ways to produce solid objects. Explain each of the
following terms:
· Additive……………………………………………………………………………
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· Direct 3-D printing ……………………………………………………………...
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· Binder 3-D printing …………………………………………………………….
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 · A car enthusiast has bought a car made in 1921. Unfortunately, none of the parts
for the car are still made.
Explain how 3-D technology could be used to create any part for this car.
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· Describe three other uses of 3-D printers.
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· Give one use for each of the following input devices:
Input device Application
Trackball
Joystick
Concept keyboard
Remote control
Microphone
[5 marks]
· Give three examples of devices operated by actuators in control applications.
For each named device, give a use in a control application.
Device 1 ………………………………………………………………………………………....
Use…………………………………………………………………………………………………
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Device 2 ………………………………………………………………………………………....
Use…………………………………………………………………………………………………
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Device 3 ………………………………………………………………………………………....
Use…………………………………………………………………………………………………
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· Describe three ways in which photographs can be transferred from a digital
camera to a computer.
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· Most smartphones also have cameras fitted as a standard feature. Give two
reasons why many people still prefer to use a digital camera rather than take
photos using their smartphone.
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· Most modern televisions and computer screens are LCD and use LED back-lit
technology.
Give three advantages of using LED back-lit technology rather than the older
CCFL (fluorescent lamp) technology.
· ……………………………………………………………………………………
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· Explain the term ‘OLED’.
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· Give two benefits of using OLED technology rather than LCD.
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· Describe suitable different applications that use of the following named sensors:
Sensor Application
Temperature

Pressure

Acoustic/sound

pH

Humidity/moisture

[5 marks]
· Direct Data Entry (DDE) is used to input data into a computer, removing the need for
manual data entry. Give the most appropriate input device for the following data items:
· Data written in special ink at the bottom of bank cheques.……………………...
· Information on the labels of products (such as a can of soup).………………...
· Shaded boxes or lozenges on a paper-based questionnaire.…………………...
· Debit and credit card details input at an ATM.…………………………………….
[4 marks]
· Seven statements about input/output devices are given below. By ticking () either the
True or False column, indicate which statements are true and which are false.
Statement True False
Webcams record images before being transmitted
Light pens only work with CRT monitors
Graphics tablets allow drawings to be modified prior to input
Data from microphones can be directly processed by a
computer
Optical mice use light to transmit data directly to the computer
Ergonomic keyboards are much smaller than standard
QWERTY keyboards
Driving (steering) wheels use sensors to detect left/right
movement to give the sensation of steering
[7 marks]
· Describe i the use and ii the operation of the following devices:
· RFID
· Use………………………………………………………………………………
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· Operation…………………………………………………………………………
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· Contactless card reader
· Use………………………………………………………………………………
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· Operation…………………………………………………………………………
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· 3-D printers produce solid objects. When data is sent to a 3-D printer, it goes through a
number of stages. The stages are shown below. By writing the numbers 1 to 5, put the
following stages in the correct order:
Description of stage Order of stage
3-D printer is now set up to allow the solid object to be ‘printed’
Finalised drawing is imported into 3-D printing software that prepares data
in a format understood by the printer
Object removed from the 3-D printer and any unwanted material is cut or
washed away to produce a final solid object
Design is made using CAD software or blueprint downloaded from the
internet
Solid object is now build up layer by layer; each layer is 0.1mm thick and
printing can take several hours
[5 marks]
· Complete the table by identifying the most appropriate output device for each use:
Description of use Name of device
Produce high quality ‘one-off’ printing, such as a photograph
Produces continuous stationery and multi-part printouts
Produces high quality printing where high volume is also
required
Produces very large printouts, such as an A0 drawing
[4 marks]
· A chemical process is being monitored by temperature and pH sensors and by a
microprocessor. A header is used to raise the temperature and a valve is controlled to
admit acid whenever the pH rises above 5.0. The following diagram is a schematic of the
process. Name each of parts numbered 1 to 6.
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· Discuss the relative advantages and disadvantages of using:
· Laser printers
· Inkjet printers
· Dot matrix printers
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