Worksheets9Forest Utilization_18 (1) GL
Total questions: 50
Worksheet time: 25mins
___________ are hardwood species usually grown in temperate countries.
Merbau
Cedar, Fir, Hemlock
Mapple, Oak, Ash
Balsa, Balau, Keruing
What is the condition of cell wall is saturated with water and there is no water in the lumen?
Fiber saturation point
Water dryness
Abnormality of water flow
Deficiency of water flow
Pentachlorophenol is a perspective which is characterize as__________.
Oil borne
Systemic
Organic based
Water borne
Uneven drying of the surface of lumber causes the defect known as_________.
Cellpase
Surface and end checking
Heart shake
Heart check
Industrial cogeneration using wood and agro-residues as fuel gives the following benefits.
I. Increase efficiency of energy conversion and use
II. More decentralized form of electricity generation thus, less transmission losses and investment to grid capacity
III. More employment
IV. Less dependent to electricity energy
I, IV
I, II, III
I, II, IV
III, IV
Wood saccharification simply means
Extraction of hydrated tar from bicarbonate extract
Acid hydrolysis of wood cellulose to produce sugar
Separation of acid liquid for soluble tar
Methyl acetone undergoes further distillation
This hardwood species belongs to the genus Instia.
Kalantas
Dao
Ipil
Betis
To sustain operation of a wood processing plant it is more important that the________ is being insured.
Conversion efficiency
Allowable cut
Capacity utilization
Annual log requirement
Bristol is a paper board manufactured by mixing sulfite and soda pulp is primarily use for__________.
Manufacturing toys
Drawing purposes
Wrapping hard materials
Paper money
A portion of log sawn on two or more series and intended for manufacturing into lumber or veneer is called____________.
Dimension lumber
Flitch
Squared lumber
Cant
This method has several shortcomings which of the following is not considered a shortcoming.
Low productivity
Very cheap to work on
High percentage of waste and high mangrove requirement
Need for extensive planning and grinding
All are considered herbal medicine, EXCEPT one:
Lagundi tablet
Kampupot tablet
Charatia pills
Virgin coconut oil
There are many standard grades of plywood which are determined based on their uses. One of the common use of plywood is for structural and construction and this type of plywood is known as________.
Engineered grade
Appearance grade
Class grade
Export grade
What kind of wood decay usually occur when both the cellulose and lignin in wood is removed?
White rot
Wet rot
Brown rot
Yellow rot
Narra wood is the best distinguished/characterized by the presence of:
Yellowish deposit
Ripple mark
Oily deposit
Chalk-like deposit
Subjecting wood to high temperature will influence the__________.
Warping on the wood density
Lower wood density
Retardation of the development of wood decay
Lower specific decay
An example of dimension lumber is__________.
1" x 4" x 6'
2" x 3" x 6'
1" x 5" x 6'
2" x 5" x 6'
What is the situation when the moisture content in wood neither gain nor loses moisture to the surrounding air?
Absolute humidity
Equilibrium moisture content
Bound water
Fiber saturation point
Resin obtained from Apitong is commonly known as__________.
Manila copal
Balau
Manila Elemi
Gutta percha
Plant which was popularized due to its extract and claimed to have some therapeutic effects in lowering blood sugar.
Ampalaya
Papaya
Lagundi
Banaba
Principal consideration why pine trees are preferred for mine timber.
It is reservoir
Long fiber and does not break easily
It is cheap
It is light in weight
Hydrapulper is an equipment use during_________.
Debarking of logs
Gravity thickening
Repulping
Brown stockwashing
Wood pulp dried and compressed rather than being produced in flexible plies which is commonly used in the form of ceiling acoustic tile.
Ply board
Card board
Chip board
Cement board
Resin is a very important raw material for manufacturing plants and this is extracted from the following plants.
I. Agathis alba
II. Pili
III. Casuaria Sp.
IV. Dipterocarpus sp.
IV, III
I, II, IV
I, II, III
I, IV
_________ is the trade name for wood product in timber classified as dicot.
Hard wood
Soft wood
Gymnosperm
Conifers
For a flat wood slap of homogeneous material, the resistance to heat transfer varies directly as the slab thickness and inversely as the thermal conductivity resistance.
Thermal conductance
Internal resistivity
Heat transfer
Heat rejection
In scientific name Shorea negrosensis, negrosensis is the___________.
Generic name
Specific epithet
Binomial name
Latin name
Tension of wood in hardwood is usually referred to as__________.
Custard wood
Reaction wood
Juvenile wood
Compression wood
What is an example of non-pressure treatment process being applied in wood preservation?
Reuping process
Bethel process
Steeping process
Conry process
Growth ring cells characterized by smaller cavities and thicker walls of trees in temperature countries is__________.
Latewood
Early wood
Annual ring
Springwood
What are the wood classified and characterize as non-porous wood?
Kalantas, Almon, Mahogany
Narra, Tindalo, Kamagong
Apitong, Bitanghol, Bolong-eta
Almaciga, Igem, Benguet Pine
Exterior water proof plywood is bonded with chemical compound known as_________.
Pentachlorophenol
Urea formaldehyde
Boron compounds
Phenol formaldehyde
What is the insect that belongs to the order Isoptera known to be the most destructive insect to wood which causes significant economic losses?
Centipede
Butterfly
Beetle
White ant
A polysaccharide of repeating glucose molecules in wood is________.
Cellulose
Lignin
Extractives
Tyloses
Structural fiber wallboard used in building construction is composed of________ molded or pasted together and usually sized on the surface or throughout.
Layer of veneer
Sawmill waste
Sawdust
Layer of chipboard
The property of any wood material that allows absorption and loss water that affects the wood quality during seasoning is called____________.
Orthotropicity
Absorb capacity
Hygroscopicity
Anisotropicity
Apitong has a _________ when compared from guijo texture.
Glossy texture
Fine texture
Coarser texture
Heavier texture
Depression of the moisture content of wood occurs due to_________.
Dry bulb depression
Due point temperature is reach
Absolute temperature difference of fresh cut and oven dried wood
Difference of dry bulb and wet bulb difference
Cellulose molecules arrange into ordered strands during growth of the tree.
Wood rays
Vessels
Tracheids
Fibrils
Moisture in trees when freshly-cut is often referred as________.
Gum
Dalingdingan
Mangachapui
sap
A woody plant belonging to Moraceae family.
Lanete
agoho
Antipolo
Dita
Used in applying the adhesive mix over the surface of the core veneer or crossbands.
Glue-mixer
Veneer spreader
Glue-spreader
Core coater
A series of markings made by machine knives in dressed lumber is________.
Degrade
Knife mark
Defect
Blemish
Growth of destructive fringe in wood materials is due to the presence of________.
Low air circulation
High relative humidity
High temperature
Moisture
The most preferred wood for furniture and cabinets.
High specific gravity group
Very dense species
Medium and moderate
Low specific gravity
What property of the wood that exhibits different values when tested along the axes in different directions?
Hygroscopic property
Mechanical property
Anisotropic property
Structural property
Low specific gravity woods_______ for furniture making.
Not preferred
Very in demand
Not in demand
Moisture
Resin canal are cavities surrounded by _________ that secrets gum, oil, ect.
Tracheids
Pores
Vessels
Parenchyma cells
__________ is a type of plywood that is capable of with standing prolonged exposure to severe conditions.
Interior type plywood
Multiple-use plywood
Grade C plywood
Exterior-type plywood
Longitudinal sap conducting elements in soft wood is _______.
Tracheids
Vessels
Resin canals
Gum pockets
