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QUESTION 5
(a) In relation to drainage systems answer the following questions.
(i) Give the meaning of the term surface water.
(2 marks)
(ii) Give TWO purposes of a retention tank in relation to stormwater drainage.
1
2
(2 marks)
(b) (i) State the purpose of a trade waste interceptor trap.
(2 marks)
(ii) Give TWO examples of where a trade waste interceptor trap must be used.
1
2
(2 marks)
(c) State TWO acceptable systems, other than an absorption trench, that could be used to
dispose of the effluent from an on-site foul water treatment system.
1
2
(4 marks)
Total 12 marks
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(a) In relation to drainage systems answer the following questions.
(i) Give the meaning of the term surface water.
(2 marks)
(ii) Give TWO purposes of a retention tank in relation to stormwater drainage.
1 contain water to be released slowly under control to nuo
2 contain water to be reused for irrigation and flushing toilets
(2 marks)
(b) (i) State the purpose of a trade waste interceptor trap.
(2 marks) intercept and retain any impuritues prior to discharge to the drain
(ii) Give TWO examples of where a trade waste interceptor trap must be used.
1 a restaurant comercial kitchen
2 forecourt in a petrol station
(2 marks)
(c) State TWO acceptable systems, other than an absorption trench, that could be used to
dispose of the effluent from an on-site foul water treatment system.
1 sand mounds (nodak and winscousin)
2 sand filter
(4 marks)
Total 12 marks