Welding and Fabrication Eng. Craft Practice 2, WASSCE (SC), 2016

Question 3

(a)        With the aid of sketches, explain each of the following flames used in gas
welding:
           
            (i)         oxidising flame;
                        (ii)        carburising flame.
            (b)        State one use of each of the following safety wears:               

(i)         helmet;
(ii)        plain goggles;
(iii)       respirator.
(c)        Name one copper alloy.

Observation

Some of the candidates were not able to correctly sketch oxidising and carburising flames. Most of them could not give neat sketches. The required sketches are shown below.
Carburising Flame

 

 

Oxidising Flame