Sensors

Question 1

What are the seven types of sensors?

Answer 1

motion/infrared
pressure
light
pH
gas
moisture
sound

Question 2

_____ devices, usually _____, send data readings to the _______ at ___ _______.

Answer 2

input
sensors
microprocessors
set intervals

Question 3

Once data readings are sent to the microprocessor, what may need to happen so that the data can be understood?

Answer 3

It may need to be converted from analogue to digital by an ADC

Question 4

What does the microprocessor do with the data initially? Using what?

Answer 4

it compares data readings against pre-set values it has stored
uses a control program

Question 5

What does the microprocessor do with the data once it is already compared?

Answer 5

it makes a decision as to whether any action is needed

Question 6

What is an example of a decision a microprocessor might have to do?

Answer 6

if more heat is necessary to maintain pre-set value, for example

Question 7

What happens once the microprocessor has made the decision? What parts may this involve?

Answer 7

it will send a signal to an output device to take action
may involve actuator

Question 8

Air conditioning works _____ ways.

Answer 8

both