Question 4
(a) State the difference between a communication pipe and a service in cold water
supply system.
(b) Sketch a cross-section through a soak-away pit with gravel filling.
(c) sketch each of the following electrical symbols:
(i)bell;
(ii)two-way switch;
(iii)socket outlet.
(d) List two finishes that are applied to the internal surfaces of a sandcrete blockwall.
Observation
Most candidates were able to:
- sketch each of the following electrical symbols:
- bell;
- two-way switch;
- socket outlet.
- List two finishes that are applied to the internal surfaces of a sandcrete blockwall.
However, few of them failed to:
(i)State the difference between a communication pipe and a service in cold water
supply system.
- paint;
- wall tiles;
- wood panels;
- plastering;
- mosaic tiles;
- facing bricks;
- p.v.c. wall panels;
- tyrolean.
Sketch a cross-section through a soak-away pit with gravel filling.
The expected response to question 4 is as given below:
(a) Difference between communication pipe and service pipe:
Communication pipe is that part of service pipe vested in the water company while service pipe is a pipe which is directly subject to pressure from a main, sometimes called the rising main, inside the building.
(d) finishes that are applied to the internal surfaces of a sandcrete blockwall: