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Support => exam support and downloads => Plumbing, Gas fitting and Drainlaying Apprentice Support => Drainlaying Exam November 2007 => Topic started by: LisaS on April 20, 2009, 04:00:14 PM

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Title: Question 1
Post by: LisaS on April 20, 2009, 04:00:14 PM

QUESTION 1
(a)   List FIVE specific requirements that must be met when laying a below-ground sanitary
drainage system.
 1
 
 2
 3
 
 4
 
 5 
 
(5 marks)
(b)  State the main purpose of a silt trap.
 
 
 
 
 
(2 marks)
(c) Trade waste is prohibited from entering the sewage system until it has been treated.
   List THREE categories that prohibited trade waste may be classified under.
 1
 2
 3
 
(3 marks)
Total 10 marks

Title: Re: Question 1
Post by: Plumber on April 20, 2009, 08:51:11 PM

Question1a

1) Right Gradients
2) Approved Bedding Material
3) Correct pipe Size and installation of access points
4) Ventilation
5) Overflow point (gully)
6) Inspection before backfill
7) Protection of drain if penetrating or subject to concrete

Question1b

designed to prevent debris from entering and clogging stormwater drains

Question1c


1) Prohibited
2) Conditionally acceptable
3) Acceptable