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<=KNEC Craft Certificate in Electrical and Electronics Engineering(Power Option) Module II : Electrical Installation II Past Paper July 2021
Consumer has a maximum demand of 1200kVA at 0.82 power factor lagging. The annual load factor is 65%. The tariff is Ksh 120 per KVA of maximum demand plus Ksh 2 per limit. Determine the annual electricity bill
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Questions List:
1. State four merits of steel conduit wiring system
2. Explain each of the following factors considered when selecting a wiring system for a particular application (i) Flexibility; (ii) Appearance; (iii) Operating conditions.
3. State two IEE regulations requirements regarding trunking wiring systems
4. Illustrate the underfloor duct wiring system with an inspection box
5. State two advantages of plastic conduits over metallic conduits
6. List four control equipment at the consumer’s intake supply point for a three phase supply.
7. Draw a labeled diagram showing termination of three phase supply energy meter
8. Outline four qualities of a good electricity tariff
9. Consumer has a maximum demand of 1200kVA at 0.82 power factor lagging. The annual load factor is 65%. The tariff is Ksh 120 per KVA of maximum demand plus Ksh 2 per limit. Determine the annual electricity bill
10. Differentiate between division 0 and division 1 in relation to special installations
11. List five types of construction material that cause corrosion
12. Explain ‘intrinsically safe circuit’ in relation to special installation
13. State three types of sounders used in alarm systems
1. State four merits of steel conduit wiring system
2. Explain each of the following factors considered when selecting a wiring system for a particular application (i) Flexibility; (ii) Appearance; (iii) Operating conditions.
3. State two IEE regulations requirements regarding trunking wiring systems
4. Illustrate the underfloor duct wiring system with an inspection box
5. State two advantages of plastic conduits over metallic conduits
6. List four control equipment at the consumer’s intake supply point for a three phase supply.
7. Draw a labeled diagram showing termination of three phase supply energy meter
8. Outline four qualities of a good electricity tariff
9. Consumer has a maximum demand of 1200kVA at 0.82 power factor lagging. The annual load factor is 65%. The tariff is Ksh 120 per KVA of maximum demand plus Ksh 2 per limit. Determine the annual electricity bill
10. Differentiate between division 0 and division 1 in relation to special installations
11. List five types of construction material that cause corrosion
12. Explain ‘intrinsically safe circuit’ in relation to special installation
13. State three types of sounders used in alarm systems
