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QUESTION 6
(a) State the function of each of the following systems fitted to a package burner:
1 Gas control system
2 Air control system
3 Ignition control system
4 Flame control system
(4 marks)
(b) State the THREE steps in the operating sequence of a two-stage automatic safety shut off valve
fitted to an industrial furnace.
1
2
3
(3 marks)
(c) Some appliances contain an overheat switch and a thermostat. Explain their relationship.
(1 mark)
Total 8 marks