finals_quiz bee Flashcards
Which of the following is not an objective of wood seasoning?
a. Decrease thermal and electrical resistance
b. Reduce weight for easy transportation and handling
c. Reduce bond failure in glued-wood products
d. Enhance resonance quality of wood for acoustic applications
A. Decrease thermal and electrical resistance
This refers to the immersing of wood in a water borne preservative for a few seconds or minutes
DIPPING
An oldest, traditional and simplest method of seasoning wood.
AIR SEASONING
It is a thin slices of wood and sometimes bark, usually thinner than 3 mm that typically are glued onto core panels.
VENEER
Which of the following best describes solar seasoning?
a. The hot air circulates between the timber logs
b. The temperature and humidity is artificially controlled.
c. A slower and gentler form of kiln drying
d. The timber is loaded into the kiln and remains in place throughout the drying process.
C. A slower and gentler form of kiln drying
A broad, interdisciplinary field focusing on the chemical and biochemical aspects of trees and products.
WOOD CHEMISTRY
The purest form of cellulose known in nature.
COTTON
It is approximately 0.5 – 1% of the wood substance.
ASH
The process of submerging wood in a tank of preservative in water solution.
STEEPING
A process used when maximum absorption of the preservative is desired.
FULL-CELL PROCESS
A plywood is a product made up of small particles of wood or fibrous agricultural materials bonded together with synthetic resin. It is also an assembled wood product usually made up of 2 or more layers of veneers held together by adhesives.
a. Both statements are true.
b. Both statements are false.
c. The first statement is true while the second statement is false.
d. The first statement is false while the second statement is true.
D. The first statement is false while the second statement is true.
The following are the components of plywood except:
a. Particleboard
b. Core veneer
c. Face veneer
d. Back veneer
A. Particleboard
An assembled wood product usually made up of two or more layers of veneers held together by adhesives
PLYWOOD
A technique used to connect two pieces of wood end-to-end.
SPLICE
There are four types of particleboard density. The low, medium, high and extra-high density particleboard.
a. Both statements are false.
b. The first statement is true while the second statement is false.
c. Both statements are true.
d. The first statement is false while the second statement is true.
C. Both statements are true
Which of the following is the high density particleboard?
a. 640 – 800 kg/m3
b. >1,100 kg/m3
c. 400 – 600 kg/m3
d. 880 – 1000 kg/3
D. 880 – 1000 kg/3
It refers to sheets of varied densities made from refined wood fibers or other ligno-cellulosic materials with the primary bond deriving from the arrangement of fibers and their inherent adhesive properties.
FIBERBOARD
A product made up of small particles of wood and/or fibrous agricultural materials bonded together with synthetic resin
PARTICLEBOARD
It refers to veneer faces and a core consists of particleboard or hardboard.
a. Comply
b. Blockboard
c. Battenboard
d. All veneer plywood
A. COMPLY
Interior glue-bond uses phenol formaldehyde resin adhesives. The bond used should withstand all weather and water exposures.
a. The first statement is false while the second statement is true.
b. Both statements are true.
c. The first statement is true while the second statement is false.
d. Both statements are false.
d. Both statements are false.
According to FAO 1991, the following are the various categories of NWFPs except:
a. Animal-derived products
b. Food
c. Industrial chemicals and Biochemicals
d. Fiber
a. Animal-derived products
Rattan is characterized by the presence of thorns or spines, hairs and bristles in the plant parts. Accordingly, Palasan is not the most widely used among the native rattans
a. The first statement is false while the second statement is true.
b. The first statement is true while the second statement is false.
c. Both statements are true.
d. Both statements are false.
b. The first statement is true while the second statement is false.
Which of the following best describes Buri?
a. It is an erect, solitary palm with a height ranging from 15-25m and a trunk diameter of about 25cm.
b. It belongs to the Arecaceae family.
c. It has 2 known varieties which can be distinguished by the color of petioles.
d. It has the lowest population along the native palms naturally growing in the Philippines.
c. It has 2 known varieties which can be distinguished by the color of petioles.
It refers to a tall shrub reaching a height of 1.5 to 3 m and the leaves are pinnately arranged with 16 – 24 sometimes 16 – 24 leaflets.
a. Akapulko
b. Buri
c. Rattan
d. Anahaw
a. Akapulko
Pine species is a source of naval stores in the Philippines. Naval stores is a resinous products obtained from conifers which includes oleoresin, rosin and turpentine.
a. The first statement is true while the second statement is false.
b. Both statements are true.
c. The first statement is false while the second statement is true.
d. Both statement are false
b. Both statements are true.
Which of the following best describes Benguet pine?
I. It has three needles as compared to Mindoro pine which has only two.
II. A medium tree reaching 25m in height and a diameter of about 80cm (Talisay).
III. A medium to large sized tree reaching a height of more than 20m and a diameter of 90cm (Minodoro pine).
a. I only
b. I, II and III
c. II and III
d. III only
a. I only
Biomass is a wood that is burned for energy (Wood fuel). It is used to refer to wood and wood-derived materials used for energy purposes which may be in solid, liquid or gaseous form (Wood energy).
a. The first statement is true while the second statement is false.
b. Both statements are true.
c. Both statements are false.
d. The first statement is false while the second statement is true.
c. Both statements are false.
Which of the following describes woody biomass?
I. It is a stored sunlight energy that can be converted to electricity, fuel, heat and fertilizer.
II. It is derived from trees.
III. It can be classified into construction scrap, sawmill residues and forest residues.
a. I and II b. 1, II and III c. I and III d. II and III
D. II and III
Gasification is a thermochemical process in which biomass at high rate is turned directly from a solid into a gaseous fuel called syngas. Syngas is a mixture of carbon monoxide, hydrogen and some methane.
a. The first statement is true while the second statement is false.
b. Both statements are false.
c. The first statement is false while the second statement is true.
d. Both statements are true.
D. BOTH STATEMENTS ARE TRUE
A thermal degradation of organic components in biomass in the absence of oxygen.
PYROLYSIS
