Question 6
- State three safety precautions that are observed during the repair of electrical appliances.
- An electric iron plugged into a live socket outlet did not heat up.
- State three likely causes of the fault.
- State two types of test that can be used to investigate the fault.
- List two instruments that can be used for the repair.
Observation
The expected answers were;
(a) Safety precautions to be observed during repair of electrical appliances
- Follow manufacturer’s safety manual / precautions / regulations
- Avoid touching any bare conductor or terminal in any appliance connected to a
voltage source
- Avoid carrying out repair work on any appliance connected to a voltage source.
- Use appropriate tools
- Carry out repairs in a well illuminated environment
- Wear safety goggles and gloves (Personal Protective Devices/ Equipment)
- Avoid repair when wet
(b) (i) Likely causes of electric iron not heating up
- open circuit / blown fuse.
- poor contact
- faulty thermostat
- faulty element
(ii) Types of test to investigate fault
- voltage test
- continuity / open circuit test
(iii) Instruments to be used for the repair
- Screwdrivers
- Voltmeter / multimeter switched to voltage range
- Ohmmeter/ multimeter
- Long nose plier
Many candidates who attempted this question did not do the question well.