Timber Technology

The classification of timber is:

• Softwood and Hardwood

• Coniferous and Deciduous

• Tropical and Temperate

• Natural and Synthetic

Answer explanation

Timber is classified into Softwood and Hardwood based on the type of tree it comes from. Softwoods come from coniferous trees, while hardwoods come from deciduous trees, making this classification the most accurate.

Common timber defects include:

• Knots, splits, and warping

• Rust and corrosion

• Fading and discoloration

• Cracking and peeling

Answer explanation

Common timber defects include knots, which are growths in the wood, splits that occur due to drying, and warping caused by moisture changes. These defects affect the wood's strength and appearance, making this choice correct.

Fill in the blank: Deciduous refers to the name given to a type of tree that sheds its leaves ________.

• seasonally

• annually

• monthly

• daily

Answer explanation

Deciduous trees are characterized by their ability to shed leaves seasonally, typically in autumn, to conserve water and energy during colder months. Therefore, the correct choice is 'seasonally'.

Which timber is described as 'Pinkish-brown timber with distinct grain and a clean, sweet smell'?

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Answer explanation

The timber described as 'Pinkish-brown timber with distinct grain and a clean, sweet smell' is likely Mahogany. This wood is known for its beautiful color and pleasant aroma, making it a popular choice in furniture and cabinetry.

What is the main use of Oak?

• Furniture, boat building, sports equipment

• High-class joinery, panelling, doors

• Externally for good quality timber buildings, saunas

Answer explanation

Oak is primarily used for high-class joinery, panelling, and doors due to its durability and attractive grain, making it ideal for high-quality interior applications.

Teak timber is known for its:

• Golden-brown color and smooth texture

• Dark-brown color and rough texture

• Light-brown color and grainy texture

• Red-brown color and coarse texture

Answer explanation

Teak timber is prized for its golden-brown color and smooth texture, making it a popular choice for furniture and flooring. The other options do not accurately describe the typical characteristics of teak.

Fill in the blank: The moisture content for carcase timber (joists etc.) should be between ___ per cent.

• 10-20

• 5-10

• 20-30

• 30-40

Answer explanation

The correct moisture content for carcase timber, such as joists, should be between 10-20 percent. This range ensures the timber is adequately dried for structural integrity and minimizes the risk of warping or decay.

Which of the following is a method of seasoning timber?

• Natural seasoning

• Chemical seasoning

• Water seasoning

• Fire seasoning

Answer explanation

Natural seasoning is a method of drying timber using air and sunlight, allowing moisture to evaporate naturally. This process enhances the wood's durability and stability, making it the correct choice for seasoning timber.

Fill in the blank: Internal timber placed directly over, or near, sources of heat should have a moisture content of ___ per cent.

• ___

• 10

• 15

• 20

Answer explanation

Internal timber near heat sources should have a moisture content of 15 per cent to prevent warping and damage. This level balances stability and moisture retention, making it the correct choice.

The purpose of air seasoning in timber technology is to:

• reduce moisture content in wood

• increase the weight of timber

• enhance the color of wood

• make the wood fire-resistant

Answer explanation

The purpose of air seasoning in timber technology is to reduce moisture content in wood, which helps prevent warping and enhances the wood's durability and stability.