Question 3
(3) (a) Sketch each of the following fittings used in plumbing work:
(i) quarter bend;
(ii) sweep tee;
(iii) hexagonal nipple.
(b) Sketch each of the following hand tools:
(i) try square;
(ii) spirit level.
(c) State the functions of the following oxyacetylene welding components:
(i) blowpipe;
(ii) nozzle tip.
Observation
Some of the candidates made wrong sketches, while others made very poor sketches. The required responses to these questions are as follows.
(c) (i) The function of a blowpipe is to bring together correct volume of oxygen
and acetylene, mix them thoroughly and pass them through the nozzle.
(ii) The nozzle tip issues out the gas mixture before it is ignited to give the desired flame.
(iii) The nozzle tip is adjusted to produce required flame to meet the welding process.