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%?

What compound is primarily responsible for the

strength of wood loaded under tension perpendicular to the grain?

Under which loading condition will a knot have

the least impact on the strength?

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?