Most candidates were able to name and sketch the types of halving joint correctly. However, they failed to:
- state the precautions that should be taken when nailing;
- name types of wood stain;
- state the reasons for staining wood.
The expected response to question 3 is as given below:
3(a) Precautions that should be taken in nailing operations
-Select the proper nail for the job.
-For greatest holding power, always nail the thinner piece of wood to the thicker
-Do not place nails in a straight line as this tends to split the wood.
-When nailing thin materials which split easily, holes to accommodate the nails
should be made with a bradawl.
- Hold the handle of the hammer close to the end.
(b) Halving joints
Sketch of Halving Joints
Dovetail halving T-halving Cross halving joint
(c) (i) Types of wood stain
- water stains
- spirit stains
- oil stains
- chemical stains
(ii) Reasons for staining wood:
- to obtain uniform colour
- to change colour of timber to a desired colour
- to colour a job to match or harmonize with existing colour
- to improve the appearance of cheap wood.