Metal Works 2, WASSCE (SC), 2021

Question 3

 

(a)  State two reasons why non-ferrous metals used for beaten metal work.

(b)  State two suitable surface finishing processes each for the following:

  1. aluminum dishes;
  2. bicycle frames;
  3. sheet steel litter bins.

(c)  (i)   State one physical test used to identify cast iron.

(ii) State two uses of mild steel.

.

Observation

 

Most of the candidates who attempted this question could not provide the required
            responses to parts (a) and (c) of the question.
The required responses to these parts are:

Explaining two reasons why ferrous metals are used for beaten metalwork

      • Because they are ductile
      • Because they are malleable
      • Because they are workable
      • Because they are soft

(i) Stating one physical test used to identify cast iron

  • Spark test
  • Filing test
  • Dropping test
  • Cutting test
  •  

    (ii)  Stating two uses of mild steel

    • Motor vehicle parts
    • Bolts and nuts
    • Structural work
    • Roof trusses
    • Ornamental work
    • Agricultural implements