2019 Forest Utilization Engineering Flashcards by Clyde Louise Arbilo

Early days of logging is best characterized as wasteful but now a days the situation is reverse due to the following.
I. Wood waste goes to mill or factories for remanufacturing
II. Use of more efficient equipment/machine in processing
III. Proper handling
IV. Proper disposal of wood waste
a. I and II
b. I, II, and IV
c. II, III, and IV
d. I, II and III

d. I, II, and III

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A study on the relationship between wood and moisture content, as well as wood and heat, elasticity, sound and light.
a. Wood physics
b. Wood strength
c. Wood chemistry
d. Wood mechanics

a. Wood physics

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_______ is a kind of fungi which does NOT attack the lignin component of wood cell and usually attacks green wood.
a. White rot fungi
b. Brown rot fungi
c. Soft rot fungi
d. Mold fungi

b. Brown rot fungi

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Consideration to insure sustainable and more profit derive in the wood processing business.
I. Secure source of raw material by having a forest concession
II. Adherence to market requirement
III. Continuous process improvement
IV. Play politics
a. I, II, and III
b. IV, and III
c. I, and IV
d. II, IV

a. I, II, and III

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Determine the percentage moisture content of a piece of wood with a green and oven dry weight of 150g and 85g respectively.
a. 76%
b. 10%
c. 25%
d. 60%

a. 76%

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The force sometimes expresses pound square inch of pull required to break the interval bonding of a panel is called ______.
a. Breakeven point
b. Tensile strength
c. Modulus of rapture
d. Modulus of elasticity

c. Modulus of rapture

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The distance that the stock being processed move during a given interval of time is _______.
a. Complete cycle
b. Peripheral cycle
c. Feed rate
d. Orthogonal cycle

c. Feed rate

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A wood with high specific gravity has some advantages such as:
I. Heat generated is high
II. Strength properties is high
III. Absorptive capacity
IV. Pulp yield is very low
Which of the following above statements are considered advantages?
a. II and III
b. I and II
c. I, III, and IV
d. II and IV

b. I and II

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Napthalene and cresylic acid are synthetic material which is best known as ______.
a. Acetate product
b. Sulfonate acid
c. Analgesic acid
d. Antisceptic acid

a. Acetate product

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The measure of the potential lumber content of a log or logs based on a particular cutting and sizes.
a. Log scale
b. Brereton scale
c. Log run
d. Mill run

a. Log scale

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Latex extraction from Canarium spp. trees are called ______.
a. Manila elemi
b. Gutta percha
c. Manila copal
d. Balau

a. Manila elemi

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Growth of destructive fungi in wood materials is dependent on the present of _______.
a. Moisture
b. Low air moisture
c. High temperature
d. High relative humidity

a. Moisture

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_______ is described as internal checking when drying stresses develops and exceed the strength of wood.
a. Honey comb
b. Case hardening
c. Twisting
d. End checking

a. Honey comb

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Longitudinal or axial wood cells that function mainly for food storage is ______.
a. Longitudinal cells
b. Axial cells
c. Parenchyma cells
d. Wood rays

c. Parenchyma cells

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Jointing is an operation where random veneers are ______.
a. Cut into standard size to minimize delay
b. Cut to make the edges straight, clamped, and glued
c. Cut automatically to full size and clipped defective parts
d. Sliced to unite together by lapping the ends

b. Cut to make the edges straight, clamped, and glued

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As a wood utilization expert, what would you recommend to avoid shrinkage or decay of freshly sawn timber?
I. Natural seasoning
II. Artificial seasoning
III. Chemical seasoning
IV. Vacuum seasoning
a. I, IV
b. II, IV
c. II, III
d. I, II

d. I, II

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Bristol board is a paper board used fro drawing purposes and the manufacture of playing cards is made of a mixture of ______.
a. Short and long fiber pulp
b. Sulfite and novelty pulp
c. Sulfite and soda pulp
d. Long and medium length pulp

c. Sulfite and soda pulp

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In wood processing the anisotropic nature of wood affects _______.
a. Chip formation
b. Electrical properties
c. Moisture content
d. Dulling of knives

a. Chip formation

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What do you call the agent that causes damage to wood in brackish water?
a. Ambrocia
b. Dry wood termite
c. Marine borer
d. Subterranean termite

c. Marine borer

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Starved joint is one of the defects in bonding two or more pieces of wood material which resulted due to ______.
a. Improper positioning of the piece of wood to be joined
b. Excessive quantity of adhesive
c. Uneven drying of adhesive
d. Unproportion mixture of adhesive

b. Excessive quantity of adhesive

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Psychrometer is an instrument use for measuring the amount of _______ in the atmosphere.
a. Rain
b. Water vapor
c. Moisture
d. Evaporation

c. Moisture

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Increment borer is an instrument used to extract core for purposes of determining the _______ of a tree.
a. Apical growth
b. Lateral growth
c. Age
d. Diameter growth

c. Age

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A lumber with a volume of 1 board ft. has a dimension of ______.
a. 1 x 1 x 1 ft
b. 12 x 12 x 1 ft
c. 12 x 12 x 12 ft
d. 1 x 12 x 1 ft

d. 1 x 12 x 1 ft

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What is that discipline that deals with the study of man at work, aimed at achieving man safety and efficiency?
a. Ergonomics
b. Technology safety
c. Anthropology
d. Operation research

a. Ergonomics

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Due to global warming problem the cutting of naturally grown timber is now banned, thus reducing the supply of lumber in the market. At present _______ is a low cost substitute for lumber produced from timber. a. Plywood b. Coco lumber c. Steel d. Hollow block

b. Coco lumber

A type of debarker applied to large, old growth logs with thick and heavy bark is called ______. a. Ring the barker b. Cambio debarker c. Spud d. Hydraulic debarker

b. Cambio debarker

It is the light colored wood beneath the bark that is susceptible to stain. a. Late wood b. Cambium layer c. Early wood d. Sap wood

d. Sap wood

Thin places in the walls of the vessels that allow sap to pass from one cavity to another in the _______. a. Xylem b. Pits c. Wood ray d. Pores

b. Pits

The first strength property of wood affected by decay is the ______ of the wood. a. Toughness b. Impact bending c. Modulus of elasticity d. Electrical conductivity

a. Toughness

These are substances which are nor considered part of the basis wood structure but merely deposit and is collectively termed as ________. a. Tannin b. Extractive c. Sap d. Hemicellulose

b. Extractive

What machine si used in plywood manufacturing, which cuts the rotary half round and rift veneer? a. Lathe b. Rifter c. Clipper d. Slicer

b. Rifter

Which of the following drying factor in NOT important in the satisfactory operation of a kiln dryer? a. Heat b. Humidity c. Free water circulation d. Air circulation

c. Free water circulation

The usual process of converting wood into charcoal is ______. a. Charring b. Condensable vapor process c. Carbonization d. Crude production

c. Carbonization

Compression failure is one indication that there exist a ______ on end grain of wod. a. Parallel stress b. Lateral stress c. Tension d. Fiber breakage

d. Fiber breakage

What particular measuring principle could you consider to insure accuracy of measuring the volume of irregular shape of wood? a. Dendrometer b. Hypsometer c. Xylometer d. Calorimeter

c. Xylometer

Satisfaction of customer is one consideration for a product to be competitive, however, one aspect which the Department of Trade and Industries are not fully implementing when it comes to wood products is ______ because accordingly it is not among the criteria in determining the criticalness of the product. a. Hardness of lumber b. Drying of lumber c. Pricing of lumber d. Grading and specification of lumber

c. Pricing of lumber

What is the wood component that consists of cellulose and hemicellulose? a. Lignin b. Holocellulose c. Glucose d. Pseudo-cellulose

c. Glucose

In sawmilling a set is provided to avoid friction during cutting. a. Oiling b. Clearance c. Inspection d. Benching

b. Clearance

Softwood destructive distillation similar in principle to that for hardwood but difference existed in _______ I. Product obtained II. Methods of refining of distillates III. In the process IV. In the treatment a. III, IV b. I, III, IV c. III, I, II d. I, II

d. I, II

The fastest way of determining moisture content of wood is through the use of ______. a. Sun drying b. Oven dry method c. Moisture meter method d. Benchmarking

c. Moisture meter method

An index use in determining of the amount of wood substances of a piece wood is ______. a. Specific gravity b. Texture c. Mass index d. Strength index

a. Specific gravity

In drying expensive/valuable wood species having large cross section, what is this kind of dryer? a. Solvent dryer b. Solar dryer c. Vacuum dryer d. Conventional kiln

c. Vacuum dryer

Lumber of different species are mixed together in the same kiln charge, what will be the drying schedule to be observed? a. Severed drying temperature at 150 degrees Fahrenheit b. The drying requirements of the species with high specific gravity c. Drying temperature at 100 degrees Fahrenheit d. The drying requirement of the species of low specific gravity

b. The drying requirement of the species with high specific gravity

Product of benzene, and napthalene are usually produces through sulfonation process, such product is better known as ______. a. Acetic acid b. Sodium aldehyde c. Synthetic wood preservative d. Synthetic tanning material

d. Synthetic tanning material

If you are to manufacture a plywood using a veneer cut in a continuous ribbon, how would you manage to cut the veneer in the logs? a. Slicing the veneer from the edge b. Centering the entire bolt in a lathe machine and rotating it against the log c. Rift-cutting of veneer from the logs d. Sawing the veneer from the logs

b. Centering the entire bolt in a lathe machine and rotating it against the log

Viscous method of producing rayon is attained by treating cellulose with strong sodium hydroxide solution and alkali cellulose is formed. When this is treated with carbon disulfide it forms an alkali solution called ________. a. Reaction agent b. Sodium chloride c. Cellulose xanthate d. Silver nitrate

c. Cellulose xanthate

The most common defect in drying wood material is ______. a. Collapse b. Honeycomb c. Surface and end-checking d. Catface

c. Surface and end-checking

A highly purified form of cellulose used in the manufacture of rayon cellophane and plastic is the ______. a. Sulfite pulp b. Mechanical pulp c. Fiber d. Dissolve pulp

d. Dissolve pulp

A furniture manufacturer inquired from a sawmill operator how a log is sawn to display the natural beauty of the wood. The sawmill operator gave the following statements; I. In plain-sawn lumber, the growth rings are tangent or parallel to the wide face; and II. In quartersawn lumber, the wood rays are parallel to the wide surface a. Only statement 1 is true b. Both statements are true c. Only statement 2 is true d. Both statements are incorrect

b. Both statements are true

Ruping process is a pressure treatment process used when _______ of preservatives is desired. a. Maximum quantity b. Limited quantity c. Normal penetration d. Deep penetration

d. Deep penetration

This is known as a miracle tree due to its multiple medicinal use. a. Banaba b. Dita c. Coconut d. Malunggay

d. Malunggay

A deviation that occurs from the anticipated line of cut in sawing rough lumber is called ______. a. Quality control b. Kerf c. Standard deviation d. Sawing variation

b. Kerf

The hemicellulose that was dissolve during mechanical pulping and peroxide bleaching can be harmful in white water. a. Anionic b. Pectins c. Peroxide d. Acid pulp

b. Pectins

Chemical analysis of the wood will enable men to determine _______. a. Difference in the heating value of the different wood species b. Difference in heat resistance c. Difference in moisture content d. Difference in toughness

a. Difference in the heating value of the different wood species

Creep or defamation in a beam usually occur due to _____. a. Maintained load b. Elasticity c. Cyclic load d. Deflection

a. Maintained load

Treating wood to high temperature causes the degradation of wood substance. What would be the irreversible effect in the wood? a. Loss of weight and strength b. Discoloration c. Reduction in dimension d. Loss of moisture

a. Loss of weight and strength

Staining particle board is easy, however, there is a need to observe the proper way of doing it. a. Use thinner to attain the desired amount of mixture and texture b. Use an impregnation machine to insure penetration c. Avoid exposing the stained wood board under the sun d. Use an oil based rather than a water based stain

d. Use an oil based rather than a water based stain.

Known for its medicinal value and food supplement. a. Yakon b. Neem tree c. Deta d. Jatropa

a. Yakon

Wood that has subjected to artificial seasoning when compared to natural seasoning considered as ________. a. Adaptable in all type of construction work b. Inferior wood c. Superior wood d. Use is limited

c. Superior wood

_______ is a renewable resources and the most abundant naturally occurring and is a polymeric composite materials. a. Resin b. Particle board c. Wood d. Bagasse

c. Wood

Modulus of rapture is a measure of ________ of a beam or column in timber mechanics. a. Rigidity or stiffness b. Tensile strength c. Compression strength d. Breaking point

d. Breaking point

A very common plant in the Philippines now recognize by the government as source of bio fuel and substitute for the traditional diesel fuel. a. Palm oil b. Jatropa c. Coconut oil d. Castor oil

b. Jatropa

Group of woody plants falling under the category of hardwood. I. Gubas II. Gmelina III. Acacia mangium IV. Douglas fir a. II, III, and IV b. I, II, nad IV c. I and IV d. I, II, and III

d. I, II, and III

What is the breaking strenth of a wooden beam expressed in stress per unit area? a. Static bending b. Fiber stress c. Modulus of elasticity d. Modulus of rupture

d. Modulus of rupture

What is the practical indicator to detect if bacterial growth occurs on wood that is submerged in water? a. Insect growth b. Swelling c. Fungal growth d. Sour smell

d. Sour smell

The following wood species are classified as wood of light color. a. Amugis, malugai, bitaog b. Narra, tindalo, ipil c. Almaciga, dita, lanete d. Kalantas, red lauan, tangulo

c. Almaciga, dita, lanete

Determine the percentage volumetric shrinkage of lumber at green wood condition of 10 cm x 10 cm x 0.5 cm and when dried below its FSP the final dimension became 9.5 cm x 9 cm x 0.48 cm. a. 25% b. 18% c. 20% d. 22%

b. 18%

A carpenter working in a furniture shop complain about the frequent dulling of the planer. What is the wood substance which contribute to the fast dulling of tools? a. Extractive b. Silica c. Tanin d. Resin

b. Silica

_________ is a blackish or brownish oil made by distilling coaltar usually used for treatment or marine piles. a. Cistin b. Creosote c. Boric acid d. Borax

b. Creosote

If there exists a cross grain in wood, this is characterize as ______ grain in that exist in the wood. a. Straight b. Slash c. Spiral d. Rift

c. Spiral

Hot setting adhesive in the manufacture of harvested wood product require a temperature of at least ______ to insure a steady joint. a. 60C to 90C b. 45C to 90C c. 100C d. 20C to 40C

c. 100C

One of the indirect benefits that should be derived from cogeneration. a. Improve food production b. Lessen dependents to electrical energy c. Improve awareness of energy conservation d. Improve environment

c. Improve awareness of energy conservation

Oil fustic is a product of Chlorophora tinctoria a woody plant belonging to the family of ______. a. Moraceae b. Legunienceae c. Fagaceae d. Eupleosbiaceae

a. Moraceae

What is the log volume input of sawmill having a recovery factor of 0.6 with an estimated recoverable lumber of 25,440 bd ft? a. 150 cu. m. b. 520 cu. m. c. 100 cu. m. d. 1,000 cu. M

c. 100 cu. m.

The most destructive stage of wood boring insects. a. Incipient stage b. Larval stage c. Advanced adult stage d. Pupal stage

a. Larval stage

To increase seasonal yield of gum extraction it is a practice to treat the freshly cut portion of the wood bark with a stimulant such as ______. a. Seed b. Acid c. Potassium d. Sugar

b. Acid

A kind of drinks which can use ceriops tangal flavoring. a. Lambanog b. Basi c. Tuba d. Tapoi

c. Tuba

It was observed that there exist discrepancy between the tangential and radial shrinkage across the wood grain resulting to one ofht lumber to dry rapidly compared to the drying properties with that of others. This is due to ______. a. Twisting b. Cripping c. Warping d. Crooking

c. Warping

What is that bark containing yellowish-brown color substance used to convert hides into leather? a. Resin bark b. Tanbark c. Elemibark d. Breablanca bark

b. Tanbark

Was emulsion is use as a sizing agent in the manufacture of particle board purposely to ________ absorption of liquid substance. a. Reduce b. Increase c. Avoid d. Prevent

a. Reduce

What is the reciprocal or electrical conductivity of wood? a. Accessibility b. Resistivity c. Reciprocity d. Diffusability

b. Resistivity

What would be the basis to change the kiln schedule of a board in kiln drying? a. Average MC of all sample b. Average MC of 3 wettest sample c. MC of the wettest sample d. Average MC of 3 driest sample

b. Average MC of 3 wettest sample

What are the disadvantages in using wood as railroad ties when compared to other railroad ties material? I. It is subject to attack, by wood destroying fungi IIl. It is subject to check and split in seasoning III. Not environmentally friendly IV. Cause degradation to the forest a. II, III, and IV b. I, II, and IV c. I and II d. I, II, and III

c. I and II

What are the parts of the plant when extraction of dye could be performed? I. Bark, leaves II. Wood, root III. Rhizome and fruit IV. Fruiting bodies found in the wood a. II, IV b. I, IV c. I, II, III d. II, III, IV

c. I, II, and III

When load is maintained in a wooden beam _____ takes place. a. Creep b. Load limit c. Deflection d. Break point

a. Creep

What kind of wood defect lowers the quality of wood but DOES NOT have major effect on the strength of the wood? a. White rot b. Stain c. Decay d. Brown rot

b. Stain

______ is a slender wood structural member used to support element in wall and partition. a. Truss b. Purlin c. Rafter d. Stud

d. Stud

Softening wood by hot water or stream to increase its pliability is a result of ______ wood? a. Equalizing b. Stabilizing c. Conditioning d. Plasticizing

d. Plasticizing

It is the average number of pounds per square inch of pressure required to cause the panel to break across the face of the wood. a. Modulus of elasticity b. Compressor stress c. Tensile strength d. Modulus of rapture

c. Tensile strength

Teak wood is preferred for ship building because of ________ property. a. Toughness b. Low shrinkage c. Light weight d. Resistance to shock

b. Low shrinkage

How would you describe the cutting done by a carpenters hand plane? a. Lateral cutting b. Side cutting c. Slide cutting d. Orthogonal cutting

d. Orthogonal cutting

What do you call the treatment applied to a wooden material purposely to reduce combustibility? a. Insecticide b. Fire retardant c. Polyethylene glycol d. Fungicide

b. Fire retardant

Bamboo in general area of two types, erect and ______. a. Spreading b. Creeping c. Clumping d. Climbing

c. Clumping

What do you call the orderly arranged cellulose molecules found in wood plants? a. Primary cell wall b. Microfibrils c. Warty layer d. Middle lamella

b. Microfibrils

The process which could prolong the life of a wood product which eliminates the need for toxic preservatives is known as ______ a. Bernouli process b. Thermo process c. Chempolis process d. Thermodynamic process

b. Thermo process

Cellulose is the principal chemical constituent of wood characterize by long slender strands is known as ______. a. Monomer b. Fiber c. Lignin d. Fibrils

b. Fiber

When the specific gravity of wood is high it is likely to display the following characteristics. I. Heat generated will be high II. Strength properties will be high III. Pulp yield will be high IV. Not susceptible to insect attack is high V. Not subject to warping Which of the above statement characterize wood of high specific gravity? a. I, II, III b. II, III, IV c. I, II, V d. III, IV, V

a. I, II, III

_________ at any given dry bulb temperature (DBT) can be converted to actual air humidity. a. Air temperature b. Wet bulb depression c. Air humidity d. Dry bulb temperature

b. Wet bulb temperature

The methods of extracting tannins from shredded wood are ______. I. Decoction II. Autoclave III. Open tank diffusion IV. Percolation a. III, II b. I, IV c. I, II d. III, IV

c. I, II

The number one agribase export earnings in 2005 is oil and dessicated coconut, a product from coconut and it is due to its economic use such as ______. I. Medical II. Vegetable oil III. Use for soap manufacturing IV. It cures all kinds of sickness a. I, II, III b. II, IV c. I, II, IV d. II, III, IV

a. I, II, III