Most candidates were able to:
- state three locations on a drainline where an inspection chamber is required;
- list materials used for the manufacture of drain pipes
However, some of them were unable to sketch:
- the conventional symbol for the given electrical fittings;
- a section through a water-closet with a P-trap.
The expected response to question 5 is as given below:
- An inspection chamber is required on a drain line where there is a
- change in direction;
- change in gradient;
- tributary (branch) line and a main line.
- - Asbestos – cement
- Pitch – fibre
- Polyvinyl chloride (P.V.C)
- Glazed – clay
- Cast – iron.
(c)
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