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Offline LisaS

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Question 6
« on: February 11, 2009, 09:35:51 AM »
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

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