2011 Forest Utilization Engineering Flashcards by Clyde Louise Arbilo

Mold is one of the attacks in wood causing discoloration, this attack is caused by ______
a. Mollusk
b. Martesia
c. Fungi
d. Ambrocia

c. Fungi

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A measure of roundwood stacked 1.2 x 1.2 x 2.4 m.
a. Stack
b. Cord
c. Pile
d. Extractives

b. Cord

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One of the uses of sulfate liquor extract in the process of peeling.
a. Detergent
b. Tanning leather
c. Bleaching agent
d. Fertilizer

b. Tanning leather

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A pulping process which subject the chip wood laterally against a revolving grindstone that reduces the chips to a fibrous mass which after screening and thickening is converted into pulp products.
a. Alkaline process
b. Mechanical process
c. Soda process
d. Sulfate process

b. Mechanical process

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A type of panel made from finely ground wood pulp, held together with a bonding agent and lightly compressed and their density is far less than that of hardboard or particle board.
a. Medium board
b. Block board
c. Perforated board
d. Soft board

d. Soft board

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NaPCP is a derivatives of ______ preservatives.
a. Synthetic
b. Air borne
c. Oil borne
d. Water borne

c. Oil borne

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Most particle boards have a small quantity of paraffin added during manufacturing purpose of which is ______.
a. To keep the board fire retardant
b. Moisture retardant
c. To serve as preservatives
d. To keep the surface shinny

b. Moisture retardant

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In a sawmill set-up that part of carriage used to control the depth of cut during sawing.
a. Dog
b. Cant hook
c. Trimmer
d. Setworks

d. Setworks

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Which of the given species of wood belong to the Fagaceae Family.
I. Mt. Apo Oak
II. Ulaian
III. Pagatpat
IV. Mankono
a, II and IV
b. I and III
c. III and IV
d. I and II

d. I and II

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That accessory of a steam generator where pulverized coal or bunker oil is received.
a. Stocker
b. Furnace
c. Condenser
d. Pre heater

b. Furnace

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Due to alternating humidity and drying which is common in the Philippines, what would you recommend as a remedy to this situation?
a. Subject heater
b. Subject to constant air circulation
c. Install a vapor barrier
d. Regulate the room temperature

c. Install a vapor barrier

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All are sources of Tanin EXCEPT one:
a. Kamachile
b. Pagatpat
c. Bakawan
d. Agoho

d. Agoho

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Include for structural framing in house construction.
a. Decay
b. Splits
c. Manufacturing imperfections
d. Wave

c. Manufacturing imperfections

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Determine the density of a lumber of 20 cu. m. loaded in a truck with a load limit of 9 tons.
a. 400 kg/cu. m.
b. 450 kg/cu. m.
c. 50 kg/cu. m.
d. 45 kg/cu. m.

b. 450 kg/cu. m.

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If the overall heat transmission coefficient of a wall is 0.15 calculate the total heat resistance of the wall.
a. 7.66
b. 6.77
c. 6.66
d. 7.77

c. 6.66

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Woods readily gives off and absorb moisture in the air makes it a _______.
a. Moisture retardant
b. Porous material
c. Water proof material
d. Hygroscopic material

d. Hygroscopic material

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The chief difference between plywood and decorative panel of hardwood and gypsum board are:
I. Plywood is 100% wood
II. Wood grain of hard board and gypsum board panel are either lithographed on the surfaced by a vinyl film overlay
III. Plywood is for interior use only
IV. Gypsum board panel is for external use only
a. I, III
b. II, IV
c. II, III, IV
d. I, II

d. I, II

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Plywood is an offshoot of the ancient art of veneering which dates back more than three thousand years which proven by the artifacts such as:
I. Veneered furniture found in the tomb of pharaohs in Egypt
II. From the tombs of China
III. Common art in Italy and France of the Renaissance period
IV. Found in the Tomb of Japanese Emperor
a. I, II, and IV
b. I and II
c. II, III, and IV
d. III and IV

b. I and II

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An equipment use to debark a log before it is manufactured into lumber is called _______.
a. Peeler machine
b. Roller mill
c. Scraper
d. Srubber mill

c. Scraper

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One use of the by product of the chemical component of wood lignin.
a. Perfume
b. Preservative
c. Herbal medicine
d. Vanillin for flavoring

d. Vaniling for flavoring

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An extract in the process of pulping which is the outcome of the preparation of neutralizing the liquor with lime concentration and separation of the organic and inorganic materials which could be used for tanning leather.
a. Soda ash extract
b. Sulfite liquor extract
c. Sulfide oxide extract
d. Soda lime extract

b. Sulfite liquor extract

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Measure of stiffness or rigidity of a beam or column.
a. Modulus of rupture
b. Modulus of rigidity
c. Static bending
d. Modulus of elasticity

a. Modulus of rupture

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Fire retardant is a kind wood treatment purposely to reduce ______.
a. Heating value
b. Combustibility of wood
c. Ash formation
d. Kindling temperature of wood

b. Combustibility of wood

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Cork is one minor forest product that is obtained from the outer bark of trees under the genera _______.
a. Dipterocarpus
b. Abstonia
c. Quercus
d. Cacia

c. Quercus

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Some plants which are believed to be source of herbal medicine by indigenous people are often causing health problems when used. a. Improper prescription by quack doctors. b. Unsanitary taking causing infection. c. Dosage not determined causing overdosage d. Herbal medicine not effective

d. Herbal medicine not effective

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

b. Clearance

Plywood is an offshoot of the ancient art of veneering which dates back more than three thousand years as proven by: a. Veneered furniture was already introduced during the Medieval age. b. Japan Emperor used veneered plywood in the 16th century. c. Plywood has already been used by the Roman Empire d. Veneered furniture has been found in the tombs of the pharoahs

d. Veneered furniture has been found in the tombs of the pharoahs

Process of submerging wood in a tank of water-soluble preservatives. a. Vacuum treating b. Dipping c. Hot and cold bath d. Osmosis

b. Dipping

Bleaching chemical that is harmful to laminated surface and are very common as household. a. Sodium bisulfate b. Hydrogen peroxide c. Sodium nitrate d. Potassium permanganate

b. Hydrogen peroxide

One consideration in the choice of wood furniture making. a. High density b. Light in weight c. Kiln dried d. High specific gravity

d. High specific gravity

A hardboard used chiefly as exterior siding. a. Patterned hard board b. Perforated board c. Striated board d. Grooved hard board

d. Grooved hard board

As Foresters what do you think is the main purpose of discovering economic use of the lesser use species in the forest. a. Sustainable development through maximization of benefit derive from forest resources b. Biodiversity conservation c. Industrialization of the country d. Educational purpose

a. Sustainable development through maximization of benefit derive from forest resources

A thin sheet of wood sliced or peeled from a log or flitches. a. Laminated wood b, Veneer c. Lumber d. Plywood

b. Veneer

Excessive quantity of adhesive will result to poor bond called ______. a. Uneven drying of adhesive b. Poor positioning c. Starved joint d. Un-proportionate mixture of adhesive

c. Starved joint

The primary purpose of adding extender in adhesive. a, Improve drying effect b. Improve strength c. Improve coagualation d. Reduces cost of glue mix

d. Reduces cost of glue mix

A log has a gross volume of 1.05 cu. m. If the volume of rotten know is 0.105 cu. m., what is the percent defect? a. 10% b. 1% c. 0.1 % d. 100%

a. 10%

People living in a developed country are very much health conscious that is why _______ is very much accepted. a. Faith healer b. Herbal medicine c. Indigenous medicine d. Traditional medicine

b. Herbal medicine

A type of panels made form finely ground wood pulp, held together with a binding agent and tightly compressed. The density is far less than that of either particle board of hard board. a. Gypsium board b. Fiber board c. Soft board d. Cheal board

c. Soft board

In chemical treatment of wood, what part of the wood could easily be treated? a. Heart wood b. Center wood c. Sapwood d. Tracheal part of wood

c. Sapwood

A quartesawn lumber has rings angles ______ with the wide surface of the board. a. 15 to 30 degrees b. 30 to 40 degrees c. 45 to 90 degrees d. 20 to 40 degrees

c. 45 to 90 degrees

To improve proper utilization of wood derived from lumbering to the greatest advantage not just in board and timber but also in _______. a. Characteristic of wood b. Lumbers by-products as well c. Property of wood d. Mechanical property of wood

b. Lumbers by-products as well

Wood fiber or tracheid is essentially a. Cellulose b. Lignin c. Hemicellulose d. Tyloses

a. Cellulose

Which of the following group of commercial trees are hundred percent falling under the classification of hardwood? I. Agoho II. Benguet Pine III. Gubas IV. Binuang a. IV, I b, IV, III c. I, II, III d. IV, II

d. IV, II

What is the density of a wood weight of 200kg, has volume of 20 cu. m. a. 1 kg/cu. m. b. 0.1 kg/cu. m. c. 100 kg/cu. m. d. 10 kg/cu. m.

d. 10 kg/cu. m.

25 - 32% of MC is very favorable for ______. a. Cutting into lumber b. Shaping c. Working into panel d. Fungal growth

d. Fungal growth

Temperate wood species usually have a very distinct growth ring because it is influence by ______. a. La Nina b. Temperate condition c. Four distinct seasons d. El Nino

c. Four distinct seasons

As applied to lumber, the size by which allowance for shrinkage is given. a. Under size b. Normal size c. Binomial size d. Oversize

d. Oversize

A woody plant use for food and with medicinal value. a. Ampalaya b. Banaba c. Lagundi d. Malunggay

d. Malunggay

Medium and moderately high specific gravity woods are the most preferred wood for ______. a, Mind timber b. Poles and piles c. Run away ties d. Furniture

d. Furniture

Particle board and medium density fiberboard are manufactured by using the Mill-waste such as: I. Wood chips II. Splinters III. Flakes and screened sawdust IV. Drift wood a. I, IV b. II, III, IV c. I, II, IV d. I, II, III

d. I, II, III

This wood has a bitter taste. a. Mayapis b. Red Lauan c. Almon d. Batino

d. Batino

One of the consideration in determining the commercial use of wood. a. Affordability b. Workability c. Demandability d. Physical properties

d. Physical properties

Which of the following species is MOST susceptible to blue stain? a. Molave b. Gubas c. Toog d. Apitong

c. Toog

Ways to utilize wood residues in order to generate revenues. I. Biomass fuel for cogeneration II. Foods for animals III. Toys for manufacturers IV. Crafting materials a. II, III, IV b. II, III c. I, III, IV d. I, II

c. I, III, IV

Losses of weight and strength of wood due to irreversible of high temperature is one causes of ______. a. Loss of durability b. Loss of moisture c. Loss of weight d. Degradation of wood substance

d. Degradation of wood substance

If the density of the species is 340 kg/cu. m., find the weight of 12 cu. m. a. 408 kg b. 40.8 kg c. 40,800 kg d. 4,080 kg

d. 4,080 kg

Which of these factors have least influence in the impregnation of timber by preservatives? a. Species of wood b. Anatomy of wood c. Preservative used d. Preparation of timber

d. Preparation of timber

It is the measurement of force required to pull apart a panel; the strength of the bond created by the resin which bond the solid into panel. a. Holding capacity b. Internal bond c. Compact strength d. Exterior bond

b. Internal bond

A measurement of the forces required to pull a panel, the strength of the bond created by the resins which bond the solid into a panel. a. Linear strength b. Internal bond c. Modulus of elasticity d. Screen bond

b. Internal bond

Carbohydrates is the principal component of wood comprising of about ______ percent a. 90 - 100% b. 50 - 60% c. 71 - 75% d. 70 - 80%

70 - 80%

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

d. Yakon

Complex phenolic polymers of irregular structure in wood. a. Lignin b. Cellulose c. Carbohydrates d. Hemicellulose

a. Lignin

The defects of wood that are considered by lumber graders in grading a lumber. I. Knots II. Missing wood III. Racks in wood IV. Discoloration V. Treatability VI. Manufacturing a. II, III, IV b. I, II, V c. I, II, III, IV, VI d. V, VI

c. I, II, III, IV, VI

A dipterocarp species often chosen for poles and piles because the heart wood is easy for the preservatives to penetrate. a. Bagtikan b. Apitong c. White lauan d. Palosapis

b. Apitong

The purpose of removing moisture of wood through seasoning is to improve _______. a. Control of air flow b. Strength c. Serviceability d. Electrical resistance

c. Serviceability

Sulfide oxide extract is a chemical extract resulting from ______ of the liquor with lime concentration which often used for tanning leather. a. Combination b. Separation c. Saturation d. Neutralization

b. Separation

The dominant wall board production method used at the moment involves laying manually selected, planed all round glued wood battens into a mold and then compressing them. This method has several shortcomings. Which of the following is NOT considered a shortcoming? a. Very cheap to work on b. Low productivity c. Need for extensive planning and grinding d. High percentage of waste and high manpower requirement

a. Very cheap to work on

An index of the amount of wood substance a piece contains. a. Strength index b. Texture c. Specific gravity d. Mass index

c. Specific gravity

This property is essential in selecting species for tool handles. a. Toughness b. Luster c. Color d. Grain direction

a. Toughness

Equilibrium moisture content is a condition wherein the timber are considered ______. a. Completely saturated of moisture b. Neither gain or lose moisture c. Completely devoid of moisture d. Reach fiber

b. Neither gain or lose moisture

Use for finishing edge of shelve and cabinets. a. T and G b. Benched strip c. S4S d. Pannel board

b. Benched strip

A 1/4 x 4 x 8 plywood contains how many bd. ft.? a. 16 bd. ft. b. 8 bd. ft. c. 4 bd. ft. d. 32 bd. ft.

b. 8 bd. ft.

Species and specific properties with a certain limit are common as basis of determining their sustainability for a particular piece of work. This is on one way of determining a. Adhere to the customs and tradition b. Maximization to the use of wod c. Proper utilization of wood d. Sustainable use of wood

c. Proper utilization of wood

Properties of wood which make it hard to dry. a. Specific gravity b. Weight c. Porousity d. Density

d. Density

Lignin is the thin element cementing layer between ______. a. Halo cellulose b. Wood cell c. Hemicellulose d. Cellulose

b. Wood cell

Structural fiber wallboard used in building construction is composed of _______ molded posted together and usually sized on the surface or throughout. a. Sawmill waste b. Layer of veneer c. Saw dust d. Layer of chipboard

d. Layer of chipboard

Measured by the load required to embed a 0.444 inch ball to one-half its diameter in the wood. a. Torsion b. Impact bending c. Toughness d. Hardness

d. Hardness

Narrow, tapering wood cell which is closed at both ends. a. Microfibril b. Wood fiber c. Parenchyma d. Wood rays

b. Wood fiber

Specific gravity of wood is an index of the amount of ______. a. Mass index b. Texture index c. Wood substance d. Weight index

c. Wood substance

Mechanical property of a wood that is used to determine its strength/resistance to ______. a. Physical force b. External force c. Chemical effect d. Temperature resistance

b. External force

Tabigi is the source of dye for tanning fish net and clothing and is called ______. a. Indigo b. Ceriops c. Nadir d. Nige

d. Nige

A mode of separating the inferior to that of the superior material is called ______. a. Soundness testing b. Quality determination c, Defect free analysis d. Grading

d. Grading

The most durable of the species listed below: a. Malapapaya b. Mancono c. Malabayabas d. Malikmo

b. Mancono

It is the average dimensional change-shrinking and expansion which can be expected in response to atmospheric or environmental humidity. a. Deflection b. Modulus of elasticity c. None of these d. Linear expansion

d. Linear expansion

Sometimes referred to as horizontal shear. a. Longitudinal shear b. Tensile shear c. Compression shear d. Lateral shear

a. Longitudinal shear

It is an important properties of wood which determine the deflection of flexural members and control the bucking of compression members. a. Modulus of rupture b. Modulus of elasticity c. Tensile stress d. Breaking point

b. Modulus of elasticity

Which of the following factors do NOT influence the yield in carbonization of wood? a. Temperature and heating time b. Species c. Wood density d. Relative humidity

d. Relative humidity

It is often referred to as the percentage of swelling that can be expected under conditions of extreme exposure. a. Water holding capacity b. Hygroscophyl c. Green weight d. Water resistant

d. Water resistant

A superficial fungal growth often in the form of a wooly or furry coating and characterized by the production of colored spores on the surface. a. Wane b. Mold c. Stain d. Dote

b. Mold

Early days of logging is best characterized as waste of fuel but now a days the situation is reused 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 wood handling IV. Proper disposal of wood waste a. I, III, and IV b. I, II, and IV c. I, II, and III d. I and II

c., I, II, and III

A polysaccharide of repeating glucose molecules in wood. a. Cellulose b. Tyloses c. Extractives d. Lignin

a. Cellulose

Substances which have some adhesive properties and are added to reduce costs of glue mix. a. Coagulants b. Minerals c. Extenders d. Fillers

c. Extenders

Decay is usually caused by wood destroying fungi, it is also called ______. a. Deterioration b. Dote and rot c. Decomposing d. Cell weakening

b. Dote and rot

Fatigue progressive damage is wood due to ______ a. Overloading b. Cyclic loading c. Uneven distribution of load d. Uneven drying of wood surface

b. Cyclic loading

The following are considered defects in round logs caused by fungus EXCEPT one. a. Red heart b. Decay c. Blue sap stain d. Scoring

d. Scoring

Growth ring cells characterized by smaller cavities and thicker walls. a. Annual ring b. Earlywood c. Springwood d. Latewood

d. Latewood

The common wood treatment applied on foundation piling of building erected in swampland is to coat the poles with coal tar product such as: I. Asphaltum II. Creosote III. Sodium nitrate IV. Diesel oil a. III, IV b. II, III c. I, IV d. I, II

d. I, II

A wood product made from converted wood fibers bonded into panels under heat and pressure, with a lignin binding. The wood fibers are produced by whirling knives in what the manufacture call as attrition mill. a. Panel board b. Cement board c. Hard board d. Card board

c. Hard board

Growing restriction on fresh water use and waste water emission are bringing change to paper making process that could lead to significant effect in ______. a. Loss of customers b. The closure of paper mill c. Reduction on the paper d. Reduction of productivity and paper quality

d. Reduction of productivity and paper quality

In lumber grading there are more than a hundred different factors to be considered however, there are three major consideration in lumber grading these are: I. Natural defects that are the result of sawing and milling. II. Variation in quality III. Characteristics that the board bears that have resulted from a combination of natural and man-made causes. IV. Lapses of lumber graders a. I, IV b. I, IV, III c. III, IV d. I, II, III

d. I, II, III