Question 6
(a) Draw the symbols used to represent the following electrical devices:
(i) Transformer
(ii) Socket outlet;
(iii) lamp;
(iv) fuse.
(b) State three tests carried out on a new electrical installation.
(c) List three types of electrical wiring system.
OBSERVATION
The expected responses were:
(a) Symbols used to represent the following electrical devices:
- Transformer:
- Socket outlet:
- Lamp:
- Fuse:
(b) Tests carried out on a new electrical installation.
- Polarity test
- Earth leakage test
- Continuity test
- Insulation resistance test
(c) Types of electrical wiring system
- Surface
- Conduit
- Trunking
- Ducting
Many candidates attempted this question. Some of them did well.