Observation

 

 

Question 4a required students to list four types of timber defects that occur during air seasoning.
The expected response is;

 

• bowing;
• springing;
• twisting;
• cupping;
• end shakes/ surface shakes /surface splits;
• end splits.
• checks.

 

Question 4b required candidates to list two types of synthetic resin adhesives. The expected response is:

• epoxy resin;
• polyvinyl acetate;
• acetal resin.
• urea-formaldehyde;
• melamine formaldehyde;
• phenol formaldehyde;
• resorcinol formaldehyde;
• contact adhesives;
• polyurethane glues;
• cyano-acrylic glues.

 

Question 4c required students to state two uses of veneers. The expected response is:

• manufacture of plywood;
• lipping of edges;
• wood bending;
• parquetry;
• marquetry;
• veneer matching.

 

Comments on Question 4

Many candidates listed general defects in timber instead of seasoning defects.