Observation

 

 Majority of the candidates were able to:
-           specify the type of foundation used on a moderately firm ground and made-up ground;
-           list some tools used in setting out a building;
-           sketch a cross-section through a substructure wall.
However, few of them were not able to:
-           specify the type of foundation suitable for reinforced concrete framed buildings; and a two storey building on a deep marshy clay soil;
-           label the sketch of a substructure wall correctly.

The expected response to question 1 is as given below:

1 (a)     Three  reasons for finishing a floor with a cement sand screed

(i)It is cheap and economical;

(ii)It has the ability to resist indentation;

(iii)It is hard wearing;

(iv)It is very easy to lay or place;

(v)It is easy to produce on site;

(vi)It can be laid to any thickness required;

(vii)It can withstand wearing;

(viii)It is resistant to noise;

(ix)It is resistant to thermal movement;

(x)It is resistant to moisture than wooden floor finish;

(xi)It is easy to clean.

 

(b)

 

(c)       Two safety precautions to be taken in a domestic electrical installation:

1. wires should be sheathed;
2. provision of fuse to check overload;
3. provision of earth wire to check stagnant current;
4. use of correct wire sizes for installation;
5. operatives must wear protective clothing;
6. a competent person should carried out the job.