Few candidates were able to:
explain the reasons for washing pit sand for concrete work; sketch a section through a formwork; label the given part of the formwork.
However, majority of the candidates failed to sketch the section through a formwork for a beam.
The expected response to question 1 is as given below:
- (a) Reasons for washing pit sand for Concrete Work
- To ensure that the sand is free from impurities.
- To ensure proper adhesion.
- To ensure adequate hydration of cement in the concrete mix.
- To remove harmful substances
- (b) Section through a formwork for a beam