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1. Which one of the following directly affects all persons working with electricity in a working environment?
2. Which one of the following is a direct implication of not complying with statutory
regulations?
3. Which one of the following diagram types does not show individual conductors
or cables but shows the sequence of equipment?
4. Which one of the following is the correct drawing scale where a wall, 4m in
length, measures 8cm on a drawing?
5. A circuit installed to supply a fire panel would be identified as:
6. The insulation material of mineral insulated metal sheathed cables is absorbent;
therefore, the terminations must be:
7. Band I and Band II circuits can be enclosed in the same enclosure, provided
that:
8. Which one of the following symbols represents the rating factor for thermal
insulation?
9. Which one of the following is the maximum current carrying capacity for a
single-core 6mm2 70 °C thermoplastic insulated non-armoured cable, enclosed
in conduit on a wall installed for a single-phase circuit?
10. Which one of the following devices is suitable for an installation supplying an X-ray machine in a hospital?
11.Which one of the following is the minimum conduit size suitable for a short
straight run containing the following stranded cables:
4 x 1.5mm2
3 x 2.5mm2?
12. Which one of the following is the conduit capacity factor to be used where a
25mm conduit has 2 bend in a 6m run?
13. What is represented by Zs in the following formula:
Zs=Ze+(R1+R2)?
14. Which one of the following is the purpose of the main protective bonding
conductor?
15. Which one of the following is metal cable trunking?
16. Which one of the following methods of generating electricity uses fossil fuels?
17. Which one of the following is a transmission voltage?
18. In which of the following parts of the electrical distribution network would a stepdown transformer be located?
19. Which one of the following is a suitable use for rainwater harvesting?
20. Which one of the following ‘finishes’ would require an additional coating to ensure protection against corrosion ?
21. Why is cable tray NOT to be used as an ‘earthing conductor’ ?
22. What is the function of ‘compartmented’ trunking ?
23. Where would a ‘fire barrier’ be fitted ?
24. identify the standard correction factor for a BS3036 ‘semi-enclosed’ fuse
25. If a circuit conductor has had no ‘correction factors’ applied, identify the current value that is used to make the final conductor size selection.
26. What name is given to the earth conductor that connects the Main earthing Terminal (MET) of the installation to the Earthing facility from the Electricity Supply Company?
27. Which one of the following is an ‘exposed conductive part’?
28. Which one of the following provides ‘basic protection’?
29. When calculating ‘fault current’, which ‘ohms law’ formula would be used?
30. If three windings in a 3-phase machine are identical to each other, which conductor is not required?
31. A protective device is ‘rated’ at 32A and has a ‘fusing factor’ of 1.5
calculate the ‘fusing current’
32. What protective device provides the function of a miniature circuit breaker usually fitted to protect supply cables?
33. Which one of the following best describes the term ‘Fault Protection’ ?
34. Which one of the following is not an example of an ‘Earth fault’?
35. Which one of the following best describes the operation of a RCD?
36. Which one of the following uses sunlight to produce hot water?
37. What type of trunking is designed primarily for luminaries ?
38. What voltage value is given for the ‘general mass of earth’?
39. Identify the protective device that offers good ‘discrimination’ when protecting circuits with very large inductive loads connected to it
40. Which one of the following is not an example of an ‘short-circuit fault’?
