Question 3
- 
      (a) State five tasks required in carrying out preventive maintenance. 
 [5 marks]
 (b) (i) List three types of wiring systems’
 [3 marks]
 (ii) State five factors that must be considered in choosing a wiring system.
 [5 marks]
 (c) The table below shows the estimates given to an individual for starting an electrical
 business. Study it and answer the following questions.
 S/NQuantity Item description Unit Price (N) Total (N) 1. 5 coils 2.5 mm2 cable 3,500 2. 5 coils 1.5 mm2 cable 2,000 3. 20 nos 26 W bulb 800 4. 5 nos 13 A socket outlet 1,200 5. 5 nos 15 A socket outlet 1,500 6. 10 nos 1 gang 1 way switch 250 7. 5 nos 2 gang 2 way switch 300 8. 100 packets clip 50 Grand Total (i) Complete the table. [5 marks] [3 marks]
 (ii) If an individual has N50, 000 as a start-up capital, how much would be borrowed for the business?
 [1 mark]
 (iii) State three other sources of funds that may be available for the individual to increase the start-up capital.
 [3 marks]
 (iv) Name three books the individual would need for the business.
Observation
Expected  response:
 .          (a)        Tasks required for preventive  maintenance                                                                       
- check/maintain the level of engine oil
- check/maintain radiator water (in use)
- check/maintain the level of electrolyte in the battery
- check/correct partial contacts on the battery terminals
- check/drain water in the fuel tank if any
- check/correct partial contact on the spark plug cap
- check for fuel level
- check/clean battery terminals
- apply grease/lubrication
(b) (i) Types of wiring systems
- cleated
- trunking
- conduit (surface/conceal)
- ducting
(ii) Factors to be considered in choice of wiring system
- safety
- durability
- appearance/aesthetic
- mechanical protection
- plan for future extension
- accessibility
- cost
- type of supply
- type of building
- expected life span
- type of load
(c) (i) Complete Table
| S/N | Quantity | Item Description | Unit Price (N) | Total (N) | 
| 1. | 5 coils | 2.5 mm2 cable | 3,500 | 17,500 | 
| 2. | 5 coils | 1.5 mm2 cable | 2,000 | 10,000 | 
| 3. | 20 nos | 26 W bulb | 800 | 16,000 | 
| 4. | 5 nos | 13 A socket outlet | 1,200 | 6,000 | 
| 5. | 5 nos | 15 A socket outlet | 1,500 | 7,500 | 
| 6. | 10 nos | 1 gang 1-way switch | 250 | 2,500 | 
| 7. | 5 nos | 2 gang 2-way switch | 300 | 1,500 | 
| 8. | 100 packets | clip | 50 | 5,000 | 
| 
 | 
 | Grand Total | 
 | 66,000 | 
                                                                                                                                    
    (ii)   Amount borrowed for business = 66,000 –  50,000 = 16,000                                                 
(iii)  Sources  of Funds
    - loan from  friends/family 
    - grant/gift /donation 
    - personal saving/thrift
    - loan from banks
    - loan from cooperative
(iv)  Books  for business
    - sales  record/book
    - stock inventory/purchase books 
    - cash book
    - invoice 
    - receipt book
    - delivery note 
