- Describe the effects of EACH of the following contaminants when found in air required for breathing and diving use:
(a) oil vapour;(4)
(b) water vapour;(4)
(c) overheated oil.(2)
7.(a) Describe TWO possible sources of contamination of compressed air used for breathing.(4)
(b) State THREE contaminants that may be found in compressed air, outlining the effect of the contaminant on the user when the compressed air is used for diving (SCUBA) purposes.(6)
7.(a) Sketch a Chemical Filter tower supplying air suitable for breathing and diving, labelling ALL elements.(4)
(b) Explain the purpose of TWO of the filter elements sketched in part(a).
Explain the maintenance and inspection that should be carried out on SCUBA cylinders.(10)
- Describe, with the aid of a sketch, a three-stage air compressor system, suitable for compressed air diving equipment. (SCUBA).
(10)