Timber

What are the characteristics of local timber? (multiple answer)

• Treatment

• Moisture Content

• Strength

• Cracks

• Density

What are the nature defects in timber?

• Knots

• Cracks

• Warps

What are the manufacturing defects in timber?

• Knots

• Preservation

• Shakes

What is the process of timber drying?

• Sun Drying

• Kiln Drying

What are the different types of preservatives for timber?

• Coal Tar Creosote

• Tar Oil

• Petroleum Oil

• Water-Borne Preservative

• Boric Acid

What are the common wood products?

• Plywood

• Glue Layered Timber

• Frosted Board

• Particle Board

Timber is a traditional material used on Malaysia and can be divided into two (2) categories which are:

• Hardwood and Softwood

• Heart-wood and Self-wood

• Heat-wood and Cool-wood

• Hand-wood and Cream-wood

Which drying method is superior for moisture removal?

• Air drying

• Kiln Drying

There are four (4) classifications of defects on timber that you have learnt. Hence, the defect shown on timber in the figure is classified as:

• Natural defects

• Chemical defects

• Conversion defects

• Seasoning defects