Question 7
(a) calculate the percentage moisture content of a piece of timber which has a wet weight of 45g and dry weight of 40g.
(b) Draw the plan of each of the following types of roof:
(i) gable end;
(ii) hipped end.
(c) Sketch the cross-section of a 3-ply plywood.
Observation
Some candidates were able to:
- calculate the percentage moisture content of a piece of timber which has a wet weight of 45g and dry weight of 40g;
- Sketch the cross-section of a 3-ply plywood
However, most of them failed to draw the plan of each of the following types of roof:
- gable end;
- hipped end.
The expected response to question 7 is as given below:
(a) Calculation of Percentage moisture content of a piece of timber:
Data: wet weight = 45%
Dry weight = 40g
(b) Drawing the plan of the following:
(i) gable end roof;
(ii) hipped end roof.
(c) Sketch of a cross-section of a 3-ply plywood.
