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<=KNEC Craft Certificate in Electrical and Electronics Engineering(Power Option) Module II : Electrical Installation II Past Paper July 2022
Explain each of the following as used in special installations:
(i) Damp situation;
(ii) Division O.
(i) Damp situation;
(ii) Division O.
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Questions List:
1. Define “wiring system”.
2. Explain each of the following factors considered when selecting a wiring system for installation: (i) Cost; ii)Safety.
3. Describe each of the following types of wiring systems: (i) underfloor ducts; ii)Trunking.
4. Figure 1 shows a wiring system. (i) Identify the type of a wiring system; (ii) Name the parts labeled A, B, C and D.
5. State three I.E.E regulation regarding the wiring system.
6. Explain the following types of electricity tariffs: (I) Two parts tariff; (II) Flat rate tariff.
7. Outline three qualities of a good tariff
8. Outline three merits of high power factor to consumers
9. A factory is loaded daily as follows: 250 kW for 2 hours per day 100 kW for 8 hours per day The charge for energy is Ksh 10 per KW of maximum demands plus 10 cents per unit. The factory operates 5 days per week and 50 weeks per year. Determine the: (i) Annual cost of units; (ii) Total annual cost.
10. Draw the layout of supply intake point with a bus bar trunking system supply motor and lighting circuits
11. Explain each of the following as used in special installations: (i) Damp situation; (ii) Division O.
12. Describe ‘fire alarm system’
13. State two applications of a fire alarm in a building
14. Draw a labeled diagram of a relay-based open circuit burglar alarm system
1. Define “wiring system”.
2. Explain each of the following factors considered when selecting a wiring system for installation: (i) Cost; ii)Safety.
3. Describe each of the following types of wiring systems: (i) underfloor ducts; ii)Trunking.
4. Figure 1 shows a wiring system. (i) Identify the type of a wiring system; (ii) Name the parts labeled A, B, C and D.
5. State three I.E.E regulation regarding the wiring system.
6. Explain the following types of electricity tariffs: (I) Two parts tariff; (II) Flat rate tariff.
7. Outline three qualities of a good tariff
8. Outline three merits of high power factor to consumers
9. A factory is loaded daily as follows: 250 kW for 2 hours per day 100 kW for 8 hours per day The charge for energy is Ksh 10 per KW of maximum demands plus 10 cents per unit. The factory operates 5 days per week and 50 weeks per year. Determine the: (i) Annual cost of units; (ii) Total annual cost.
10. Draw the layout of supply intake point with a bus bar trunking system supply motor and lighting circuits
11. Explain each of the following as used in special installations: (i) Damp situation; (ii) Division O.
12. Describe ‘fire alarm system’
13. State two applications of a fire alarm in a building
14. Draw a labeled diagram of a relay-based open circuit burglar alarm system
