Timber 2.01

Question 1

What is the name of the most common defect in wood?

Answer 1

knots

Question 2

Name defects induced by climatic and technical influences in wood?

Answer 2

Shrinkage deformations:
-bow
-cup
-twist
Cracks:
-shrinkage
-lighting shake
-freeze crack

Question 3

Name defects induced by biological influences in wood?

Answer 3

-resin canals
-discoloration
-insect attack
-any living organism attack

Question 4

How does the most inner part of the core and the stem is called?

Answer 4

pith

Question 5

How does the cellular tissues and woody fibers arrange in indistinct concentric circles are called?

Answer 5

annular rings or growth rings

Question 6

Explain the term fiber saturation point.

Answer 6

the state in which the cells walls are saturated but the cell cavities are free of water. ( normally 25-30%)