QUESTION 2
(a)  The bedding requirements when laying solvent welded uPVC pipe and vitrified clay or
concrete pipes using socket and ring jointing are different.
 (i)  Clearly explain this difference.
 
(2 marks)
 (ii)   Neatly draw a side elevation of a vitrified clay or concrete drain to demonstrate 
this difference.
 
(1 mark)
(b)  From your knowledge of New Zealand Building Code Clause G14 Industrial Liquid Waste,
answer the following questions.
 (i)  Give the meaning of the term industrial liquid waste (trade waste).
(1 mark)

any subtance generated from a trade premise in the course of there activitys
(ii) 
Industrial liquid wastes (trade wastes) that are prohibited from entering a sewage
system fall under THREE categories. State these categories.
  1 prohibited
  2 conditionally acceptable
  3 acceptable
(1 mark)
 (iii)   In controlling the discharge of trade waste, state what and who are being protected.
(1 mark)   
                             The objective of this
provision is to safeguard people
from injury or illness caused by
infection or contamination
resulting from industrial liquid waste
 

(c)  AS/NZS 3500 Part 3: Stormwater drainage states that when the diameter of a site stormwater
connection to a street curb or gutter is larger than DN 100mm, the installation of an inlet pit
may be required.
  Using drawing equipment, draw and label a typical arrangement for an inlet pit with sump
and footpath crossing. Show the position of the property boundary.
       
(4 marks)
Total 10 marks