Most candidates were able to:

-           state the reasons for bonding blocks in wall construction;
-           state the factors to be considered when selecting materials for wall construction;
-           state the reasons for providing windows in a building;
-           sketch the plan of an open well concrete staircase.

However, few candidates were unable to:

-           state the reasons for bonding in wall construction;
-           label the plan of an open well staircase.

The expected response to question 3 is given below:

1. Reasons for bonding:

1. To obtain strength;
2. To ensure stability;
3. To create an acceptable appearance;
4. To avoid continuous vertical joints.

1. Factors to be considered when selecting a material for wall construction:

-           strength;
-           durability;
-           moisture resistance;
-           cost;
-           thermal and sound insulation impermeability;
-           aesthetics;
-           fire-resistance.

1. Reasons for providing windows in a building:

1. for viewing;
2. for ventilation;
3. for protection against weather;
4. for aesthetic purpose;
5. to let in light.

1. Open well staircase: