| 1. |
Explain
the difference between open and closed loop control systems.
|
(1) |
| 2. |
A
manufacturing company has decided to install mobile robots for
collecting the various production parts and taking them to the
production line. The robots can sense if the shelves are empty
of stock and therefore do not go through the process of trying
to lift nothing. Is this an example of open or closed loop control?
Explain your answer.
|
(2) |
| 3. |
Sensors
may be analogue or digital.Give an example of each of these types
of sensor.
|
(2) |
| 4. |
Robots
are used at an airport to blow warm air onto the runways if the
temperature is below freezing. Sensors are fitted to the robot
so that the computer can activate the blowers automatically.This
is an example of a closed loop system. Why should a closed loop
system be used in this case?
|
(1) |
| 5. |
The
temperature constantly varies. What must happen to the data from
the sensor so that the computer can process it?
|
(1) |
| 6. |
Three
companies are described below. The companies have different
reasons for using automated systems. Copy and complete the sentences
below to give a reason why each company uses an automated system
rather than a manual system. Give a different reason for each
company.
|
|
| |
(a) |
CIC Chemicals
produces chemicals which give off poisonous fumes. An automated
system would be used to handle these because…
|
(1) |
| |
(b) |
Eko Electronics
makes parts for different types of computer. It often gets rush
orders for 1000 parts to be made as soon as possible. An automated
system would be used because…
|
(1) |
| |
(c) |
Peterson’s
Plastics makes cases for hi-fi systems. It needs to make many
cases and each case has to be identical and very well made. An
automated system would be used because… |
(1) |
| |
|
|
|
| |
|
Total |
(10) |
