Question 8
- List the steps involved in using a multimeter to check the status of the mouthpiece of a mobile phone
- What is the resistance range of a functional mouthpiece?
- Name two tools required for troubleshooting and repairing a faulty mouthpiece.
Observation
The expected answers are:
Most candidates performed poorly in this question. They could not list the steps required in 8(a) and could not state the resistance range of a functional mouthpiece as required in 8(b). In 8(c), candidates again showed inability to distinguish between materials and tools.
8(a) Steps involved in using a multimeter to check the status of a mobile phone mouthpiece
- Plug the red and black probes into the appropriate socket on the multimeter.
- Set the multimeter to the appropriate resistance range
- Connect the probes to the terminals of the mouthpiece
- Check the resistance value on the display
(b) Resistance range of a functional mouthpiece is (19 – 23) Ω
(c) Tools for troubleshooting and repairing mouthpiece
- screwdriver
- soldering iron
- multimeter
- rework station
- tweezers