(4) (a) Sketch each of the following hand tools:
(i) pipe wrench;
(ii) hacksaw.
(b) State two methods of maintaining hand tools.
(c) List four types of pipe used in plumbing work.
This question did not pose any problem to the candidates who attempted it.
(5) (a) Describe each of the following terms used in welding operation:
(i) backfire;
(ii) sustained backfire;
(iii) fusion welding
(b) State two safety precautions to be observed in a plumbing workshop.
(c) Sketch the symbol used to represent each of the following safety
instructions:
- wear eye protection;
- do not extinguish with water.
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