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A - Describe TWO tests that can be used to determine how well a natural draught flue is working.
(1)
(2)
(2 marks)
B - State FOUR factors to be considered in selecting the position for an open flue terminal.
(2 marks)
C - What are TWO of the possible dangers if the heat exchanger of a domestic warm air heating unit has a hole in it.
(2 Marks)
( Total 6 marks )