6706 Carpentry and Joinery Unit 115 Timber Defects

What is a 'live knot' in timber?

• A knot in timber that is still attached to the living tree.
• A decorative feature added to timber.
• A knot that is completely removed from the tree.
• A type of wood treatment process.

Which defect is characterised by cracks that occur in the heart wood of the timber?

• Cup shake

• Heart shake

• star shake

• Waney edge

what is meant by the term Waney edge?

• A waney edge is a term used for wood that has been treated with chemicals.
• A waney edge is a type of wood finish that is smooth and polished.
• A waney edge is the natural edge of a piece of wood that includes the bark and irregularities from the tree.
• A waney edge refers to the straight cut edge of lumber.

Which of the following is a seasoning defect in timber?

• Dead Knots

• Splitting
• Fading
• Warping

What does 'cupping' refer to in timber defects?

• Cupping is a method of drying timber.
• Cupping is a type of wood treatment to prevent decay.
• Cupping refers to a distortion in timber where the edges are raised or lowered compared to the center, creating a concave or convex shape.

• Cupping refers to the process of cutting timber into planks.

Which defect is caused by the presence of non-wood materials within the timber?

• Foreign bodies

• Knots
• Splits
• Warping

What is 'case hardening' in timber?

• When the outer layer of the timber dries and hardens faster than the inner layers, causing internal stresses

• A method to treat timber with chemicals for pest resistance.
• A technique to laminate multiple layers of wood together.
• A process that makes the entire timber uniformly hard.

Which defect is characterised by cracks that extend from the middle of the timber outwards?

• • Cup shakes

• Heart shake

• shake

• Waney edge

What is a 'resin pocket' in timber?

• A resin pocket is a method of treating timber for durability.
• A resin pocket is a type of wood defect caused by insects.
• A resin pocket is a localized accumulation of resin in timber.
• A resin pocket is a decorative feature added to timber surfaces.

Which of the following is NOT a natural defect in timber?

• Splits

• Knots

• Bowing

• shakes