Control Device- Quiz

Question 1

Control devices are:

Answer 1

output devices which work together with sensors

Question 2

Define sensors

Answer 2

sensors gather “measurable” data from the environment and input it into a computer. They do not need any human involvment.
Sensors typically gather data such as temperature, pressure, pH etc.

• data gathered by a sensor is input into a computer.
• once the computer has decided what to do with the data it sends instructions to the control device.
• the control device then physically changes something in response to commands received from the computer.

Question 3

what does the control device do?

Answer 3

-the control device then physically changes something in response to commands received from the computer

Question 4

example

Answer 4

• breaks the infrared light sensor on security.
• process- sent to a small computer inside the security light
• the computer sends instructions to an actuator, telling it to switch on the security light.
• output- the actuator switches on the security light

Question 5

define actuator

Answer 5

actuators take instructions from the computer and then make the physical part of the process happen.

actuators respond to instructions sent by a computer.
eg. motors, pumps, switches, and valves

Question 6

example of control devices

Answer 6

motor, buzzer, heater, light/ lamp

Question 7

NB

Answer 7

each of these control devices are switched on and off by an actuator, therefore do not confuse with actuator and the control device.

Question 8

types of sensors, hence control devices

Motor

Answer 8

• automatic washing machines
• dvd player
• air conditions
• controlling robot arms
• spinning disk in hard disk drives
• cooling fan

Question 9

buzzer

Answer 9

microwave ovens

-alarm system

Question 10

heater

Answer 10

central heating systems
washing machine
automatic greenhouse

Question 11

light

Answer 11

security lights

automatic greenhouse