18 Questions
What is the main factor that determines the quality of the finished lumber product?
The direction of the wood grain
Which part of a tree trunk is where liquid sap passes through from root to crown?
Sapwood
How can the age of a tree be determined?
By counting the annual rings in the tree trunk
What process is crucial in ensuring that lumber achieves excellence in quality?
Drying or seasoning the lumber
What is done to logs to make them suitable for use after being sawed into lumber?
Seasoning or drying
What characteristic of lumber can be classified based on its direction, arrangement, or alignment?
Grain
Which part of a tree is the principal source of lumber?
Trunk
What is the primary function of the cambium layer in a tree?
Developing into wood or bark
Which tree part is responsible for absorbing water and oxygen necessary for plant respiration?
Roots
What is the thick outer part of tree bark called?
Cortex
Which part of a tree is most susceptible to insect attacks?
Pith
In making cork and tannic acid, which part of the tree is used?
Cortex
What does air drying refer to in the context of lumber?
Drying lumber by piling the boards carefully in open air
Which method aims to hasten the rapid evaporation of moisture contained in 'green wood'?
Kiln drying
Why is softwood cheaper than hardwood?
Because softwood is lighter and easier to work on
In lumber classification, which type of trees fall under softwood?
Trees with needlelike leaves that shed
What is the main purpose of leaving a small open space between edges when air drying lumber?
To facilitate quicker evaporation of moisture
How is kiln drying different from air drying when it comes to drying lumber?
Kiln drying uses an oven for drying, while air drying uses open air
Test your knowledge on classifying wood textures based on size, quality, abundance, and width of annual rings. Learn about textures ranging from very fine to coarse, and understand examples like agoho, ipil, narra, and more.
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