Pages in this set

Page 1

Preview of page 1
ANSWER VERSION OF - Analogue to digital converters, sensors, control & monitoring (1)
Here are some examples of past exam questions with answers shown in red:
1) Peter is using a computer in a science experiment. He leaves a sprig of pond weed in water in the sun for an…

Page 2

Preview of page 2
WAIT n Wait for n seconds
Use the program instructions to complete this program sequence for opening the window if the temperature rises
over 60oC [3]
START

READ temperature

IF temperature> 60

MOTOR FORWARD

WAIT 10

MOTOR STOP

END
3) The temperature of the water in a fish tank is…

Page 3

Preview of page 3

READ temperature

IF temperature< 18

THEN HEATER ON

IF temperature> 24

THEN HEATER OFF

END
4) A market gardener uses a computer-controlled system to keep the humidity in a large
greenhouse suitable for growing plants. The system contains these components:
a computer
analogue to digital converters (ADC's)
humidity sensors
actuators…

Page 4

Preview of page 4
Read the room temperature A
Switch off the heating C
Switch on the heating B
b) Give 2 advantages of using a microprocessor to control the heating system in a home [2]
Two answers from:
The microprocessor controlled system will use less fuel than a system without this control because…

Comments

No comments have yet been made

Similar ICT resources:

See all ICT resources »