Question 4
(a)
(i) Define the term rain cycle.
(ii) Use a sketch to illustrate the rain cycle.
(b)
(i) List three classes of water pipes based on uses.
(ii) Using a neat sketch, describe how the classes of pipes are used for water supply into a building.
Observation
Most of the candidates had difficulty answering this question. They could not give technical definition and explanations of the terms required.
The required responses to question 4 are given below.
(a)
(i) DEFINITION OF RAIN CIRCLE
Rain cycle is the repeated process of evaporation and condensation of
earth’s surface water which results in rainfall.
(ii) A sketch illustrating the rain cycle:
(b) (i) CLASSES OF WATER PIPES BASED ON THEIR USES
- water mains;
- service pipes;
-distribution pipe.
DESCRIPTION OF HOW CLASSES OF PIPES ARE USED FOR WATER SUPPLY INTO A BUILDING;
