Observation

Candidates were expected to:

(i) use a sectional sketch to illustrate pilot hole, clearance hole, counter bore;

(ii) list two types of solvent used in the production of wood finishes;

(iii) state one function of a solvent in a wood finish.

This solution is shown below: .

(a) Sectional sketch illu strating holes in screwing:  

b (i)       Solvents used in wood finishing:
            -           thinner;
            -           turpentine;
            -           water;
            -           paraffin;
            -           methylated spirit;
            -           kerosene.

  (ii)       Functions of a solvent in a wood finish:

            A solvent:

            -           dissolves a finish with the purpose of thinning the finish;
-           enhances the drying of finishes;
-           quickens the application of finishes.