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IMP WOOD > WOOD > Flashcards

WOOD Flashcards

1
Q

What is wood?

A

The principal strengthening and nutrient-conducting tissue of trees and other plants, one of the most abundant and versatile natural materials

Wood is produced by many botanical species, including both gymnosperms and angiosperms, and is available in various colors and grain patterns.

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2
Q

List three properties of wood.

A
  • Strong in relation to its weight
  • Insulating to heat and electricity
  • Desirable acoustic properties
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3
Q

True or False: Wood is a material that has been in service since humans appeared on Earth.

A

True

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4
Q

What are the two categories of wood-producing plants?

A
  • Gymnosperms
  • Angiosperms
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5
Q

What type of wood do gymnosperms produce?

A

Softwoods, such as pine and spruce

Gymnosperms are cone-bearing trees.

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6
Q

What type of wood do angiosperms produce?

A

Hardwoods, such as oak, beech, teak, and balsa

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7
Q

What is the economic importance of wood?

A

It can be sustainably managed as a renewable resource, providing jobs and supporting economic development.

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8
Q

What are roundwood products?

A
  • Poles
  • Posts
  • Certain mine timbers
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9
Q

What is the main sawn wood product?

A

Lumber

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10
Q

Fill in the blank: The yield of lumber in a sawmill varies from about _____ percent.

A

30 to 70

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11
Q

What is veneer?

A

A thin sheet of wood of uniform thickness, commonly 0.5–1.0 mm

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12
Q

What are the three methods of producing veneer?

A
  • Rotary-cut
  • Sliced
  • Sawn
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13
Q

What is plywood?

A

A panel product manufactured by gluing layers of wood together with grains crossed at right angles.

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14
Q

What are the advantages of plywood over natural wood?

A
  • Dimensional stability
  • Uniformity of strength
  • Resistance to splitting
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15
Q

What is molded plywood?

A

Plywood manufactured in curved form, used for boats, furniture, and other products.

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16
Q

What is laminated wood?

A

Wood built by the parallel gluing of lumber boards in various sizes and shapes.

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17
Q

What is particleboard made from?

A

Particles of wood glued together, including flakes, shavings, and splinters.

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18
Q

What are the two types of fiberboard?

A
  • Insulation board
  • Compressed (hardboard)
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19
Q

What is medium-density fiberboard (MDF)?

A

A new compressed product manufactured in a range of thicknesses, less dense than hardboard.

20
Q

True or False: Veneers are primarily used for plywood and furniture.

A

True

21
Q

What type of adhesive is commonly used in plywood production?

A

Thermosetting synthetic resins, such as phenol-formaldehyde and urea-formaldehyde.

22
Q

What is wood?

A

Wood is the principal strengthening and nutrient-conducting tissue of trees and other plants, and one of the most abundant and versatile natural materials.

23
Q

What types of plants produce wood?

A

Wood is produced by many botanical species, including both gymnosperms and angiosperms.

24
Q

What are the properties of wood?

A

Wood is strong in relation to its weight, insulating to heat and electricity, and has desirable acoustic properties.

25
Q

What feeling does wood impart compared to other materials?

A

Wood imparts a feeling of ‘warmth’ not possessed by competing materials such as metals or stone.

26
Q

How has wood been used throughout history?

A

Wood has been in service since humans appeared on Earth and maintains a place in most of its traditional roles despite technological advancements.

27
Q

What are some common products made from wood?

A

Common products include lumber, furniture, plywood, wood-based panels, pulp, and many chemical products.

28
Q

What is the role of wood in plants?

A

In botanical terms, wood conveys water and dissolved minerals from the roots to the rest of the plant, stores food created by photosynthesis, and furnishes mechanical support.

29
Q

How many species of plants produce wood?

A

An estimated 25,000 to 30,000 species of plants produce wood, but only 3,000 to 4,000 species produce wood suitable for use as a material.

30
Q

What are the two categories of wood-producing plants?

A

Wood-producing plants are categorized into gymnosperms and angiosperms.

31
Q

What types of wood do gymnosperms and angiosperms produce?

A

Gymnosperms produce softwoods, such as pine and spruce, while angiosperms produce temperate and tropical hardwoods, such as oak, beech, teak, and balsa.

32
Q

Is the distinction between hardwood and softwood always accurate?

A

The distinction implied by hardwood and softwood is not true in all cases; some hardwoods, like balsa, are softer than some softwoods, like yew.

33
Q

What is wood?

A

Wood is a material of great economic importance, found throughout the world and can be sustainably managed as a renewable resource.

34
Q

How does wood contribute to the economy?

A

Wood provides jobs and supports economic development through its harvesting, transportation, processing, trade, and use.

35
Q

What are roundwood products?

A

Roundwood products include poles, posts, and certain mine timbers, which are used for various supports and foundations.

36
Q

What is lumber?

A

Lumber is the main sawn wood product, typically larger than 10 cm in width and thickness, suitable for heavy constructions.

37
Q

What is the process of converting logs to lumber?

A

The conversion involves breaking logs down into boards of various thicknesses through resawing, ripping, and crosscutting.

38
Q

What is the yield of lumber in a sawmill?

A

The yield varies widely from about 30 to 70 percent, depending on machine types, log diameter, and wood quality.

39
Q

What is veneer?

A

Veneer is a thin sheet of wood, commonly 0.5-1.0 mm thick, used primarily for plywood and furniture.

40
Q

How is plywood made?

A

Plywood is made by gluing layers of wood together with alternating grain directions for strength and stability.

41
Q

What are the advantages of plywood?

A

Plywood offers dimensional stability, uniform strength, resistance to splitting, and decorative value.

42
Q

What is laminated wood?

A

Laminated wood is created by parallel gluing of lumber boards, often used for load-carrying members like beams.

43
Q

What is particleboard?

A

Particleboard is manufactured from particles of wood glued together, using residues from sawmills and other industries.

44
Q

What is fiberboard?

A

Fiberboard is made of wood fibers, held together by physical forces or resin adhesives, and comes in insulation and compressed types.

45
Q

What is medium-density fiberboard (MDF)?

A

MDF is a type of fiberboard manufactured in various thicknesses, less dense than hardboard, and can be machined like solid wood.

IMP WOOD (2 decks)

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