Question 3
(a) (i) Name the equipment shown in the sketch above
(ii) Name the parts labelled P, Q, R, S and T
(iii) State the function of the parts labelled P and R
(b) State two factors that determine the choice of gas welding over electric arc welding for a given job.
Observation
The Candidates did really well on the questions under this question number. The part on which they slightly went off the true path was (b); and the solution is as given below.
(b) The factors that determine the choice of gas welding over electric arc welding for a given job are:
- the thickness of the metals to be joined;
- the types of metals to be joined;
- the type of joint needed to be produced;
- the temperature requirement of the joint;
- portability;
- operating cost. Etc