Assessment Flashcards
a point when all water is evaporated from cell cavities but the cell walls are still fully saturated with moisture
Fiber Saturation Point
wood that is usually associated with high lumber strength and stiffness has a ________
high density
example of wood with high density
- kamagong
- molave
- apitong
- narra
a surface shrinkage experiences a greatest amount of movement in _________ section
tangential
the quality of wood that changes in size or in its physical property according to the direction in which it is being measured
anisotropy
theory of the physical and mechanical properties of wood and wood based materials
wood physics
a condition by which the moisture content of the wood is balanced with that of the atmospheric moisture condition
equilibrium moisture content
good indicator of the amount of wood substances in a given block of wood
density
it is a solid material from trees or shrubs
wood
the ability of wood to lose and absorb water
hygroscopicity
increased in wood dimension and volume as it gains moisture below FSP, expressed in percent
swelling
formula of %MC
%MC= (Wg- Wo/ Wo) 100
it is the increment of wood added during a single growth period
growth rings
in drying process, it is the first to be removed but the last to fill up the pores when the wood absorbs water or moisture
free water
it significantly affects the physical properties of wood as it leads to decrease in hardness and stiffness
water
the acceptable moisture levels of wood and lumber range from ___________ for interior and 9-14% for exterior
6-9%