QUESTION 1
(a) State the main purpose of an overflow relief gully.
(1 mark)
(b)   From your knowledge of AS/NZS 3500 Part 2: Sanitary plumbing and drainage, list FOUR
locations where overflow relief gullies must be positioned.
1

2
3
4

(4 marks)

(c)  Prior to the excavation of trenches, certain precautionary actions should be considered with
regard to safety. List FIVE such precautions.
1

2
3
4

5
(5 marks)
Total 10 marks


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