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