Unit 5B Timber Sources, Origins and Properties of Timbers

What are the two main types of timber finish mentioned in the text?

• Rough sawn and planed all round (PAR)

• Smooth sawn and rough cut

• Polished and varnished

• Kiln-dried and air-dried

Which type of timber is often used for exterior tasks?

• Rough sawn timber

• Planed all round (PAR) timber

• Kiln-dried timber

• Air-dried timber

What is the main purpose of seasoning timber?

• To reduce moisture content

• To increase weight

• To change color

• To make it more flexible

What is the typical moisture content of air-dried timber in the UK?

• Around 18%

• Below 10%

• Above 50%

• Around 30%

What is the main reason kiln-dried timber can be sold sooner?

• Faster drying process

• Heavier weight

• More flexible

• Higher moisture content

What does kiln-drying do besides reducing moisture content?

• Kills bacteria and insects

• Increases weight

• Changes color

• Makes timber more flexible

Why is it cheaper to use veneered boards rather than solid wood planks?

• Veneered boards are lighter

• Veneered boards use less natural timber

• Veneered boards are more colorful

• Veneered boards are thicker

Why could the use of manufactured board be considered more sustainable than solid timber?

• It uses more resources

• It is heavier

• It uses recycled materials

• It is more expensive

What is the appearance of manufactured boards usually like?

• Bright red

• Pale brown

• Dark black

• Shiny silver

What is the main advantage of using the rotary method in veneer production?

• Produces the shortest sheets

• Produces the longest sheets

• Uses less energy

• Is more colorful