Question 4
(a) Illustrate with sketches, four sources of water supply.
(b) (i) What is a ball valve?
(ii) List four types of ball valve
Observation
Most of the candidates were able to:
- illustrate with sketches, four sources of water supply
- list three types of urinals.
However some of them could not explain what is a ball valve.
The required response to question 4(a) is given below:
4(a)A sketch illustrating four sources of water supply:
