A surface treated paint-on wood preservative is

just as effective as pressure treated wood preservative in extending the

service life of timber. True/false?

What

are the requirements for fungi to grow and cause deterioration in wood

The visual grading of timber, using the % area

of knots, provides a reliable way of assessing the strength of timber with good

correlation between % area of knots and the measured strength. True/False?

A timber beam is tested under flexure and found

to have a bending strength of 45 MPa under standard test conditions. Estimate

the flexural strength if the load were maintained for 15 days.

When a sample of wood (approximate moisture

content 70%) is oven dried the tangential shrinkage is determined to be 10%.

Assuming the Fibre Saturation Point (FSP) is 29% what is the tangential

shrinkage that occurs when the moisture content of the wood decreases from 70%

to 6%?

Under which loading condition will a knot have

the least impact on the strength?

What compound is primarily responsible for the

strength of wood loaded under tension perpendicular to the grain?

The greatest shrinkage in green wood takes place

during drying between the fibre saturation point (FSP) and the oven dry state.

True/false?

Which of the following is a reason why wood is

considered to be a highly variable materials?

Which part of the tree has the greatest

resistance to decay?