Elect Installation & Maintenance Work 2, WASSCE (SC), 2023

Question 3

 

  1. (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/N

    Quantity

    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]
    (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.

                                                                                                                                        [3 marks]

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