Timber defects

What can cause defects in site carpentry?

• Insects

• Paint

• Metal

• Plastic

What is a sign of wet rot in timber?

• Wood is extremely hard

• Wood is very soft and pulpy

• Wood is shiny

• Wood is cold to the touch

What causes dry rot in timber?

• Moisture content above 20% and bad ventilation

• Exposure to sunlight

• Lack of insects

• Too much paint

How do fungi spread through timber?

• Forming a mat of cotton wool like threads

• Running

• Jumping from one timber to another

• Flying

What is the most effective form of timber preservation?

• Pressure treatment

• Brush application

• Spraying

• Dipping

What are the typical signs of wet rot?

• Very dark, damp wood

• Bright colored wood

• Wood with stripes

• Wood that is very light

Which of the following is NOT a type of insect that attacks timber?

• Butterfly

• Furniture beetle

• Death watch beetle

• House longhorn beetle

What is woodworm?

• A woodworking tool

• A type of preservative

• A type of fungus

• The larvae of wood boring beetles

What is the purpose of timber preservation?

• To poison the food for fungi & insects

• To make the wood shine

• To make the wood softer

• To change the color of the wood

Which of the following is a method of applying preservatives to timber?

• Freezing

• Baking

• Pressure treatment

• Microwaving