Observation

Majority of the candidates were able to:

• state three reasons for providing a ceiling in a roof construction.
• list three methods of finishing an external surface of a sandcrete block wall

However, many of them failed to List the six stages involved in testing a newly laid drain using the water test method

The expected response to question 3(a) is as given below:

Stages involved in testing a newly laid drain using the water test method:

• plug the lower end of the drain;
• fix 1.5m water head cistern to the pipe;
• fill to the required level
• leave it for about 2 hours and check the water level;
• top up the water when required;

check the levels again after an hour where drop of water observed is greater, the pipeline must be inspected for leakages.