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cmt wood > wood > Flashcards

wood Flashcards

1
Q

fibrous substance

A

wood

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2
Q

provides mechanical protection

A

outer bark

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3
Q

produced by photosynthesis are translocated from leaves to roots

A

inner bark

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4
Q

layer bet. bark and wood

A

cambium

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5
Q

living wood (roots to leave)

A

sapwood

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6
Q

extending from the pith to sapwood

A

heartwood

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7
Q

softcore, near center

A

pith

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8
Q
A
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9
Q

sheets of ribbons

A

medullary rays

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10
Q

grows by addition inwards

A

endogenous

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11
Q

grows by addition outwards

A

exogenous

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12
Q

divides to develop larger branches. harder and more valuable

A

hardwood

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13
Q

straight trunk smaller branches. softer and less durable

A

softwood

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14
Q

right handed direction

A

interlocked-grained wood

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15
Q

result of sawing

A

diagonal-grained wood

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16
Q

fibers take a spiral course

A

spiral-grained wood

17
Q

fibers run parallel to the axis

A

straight-grained wood

18
Q

fibers collectively form of waves or undulations

A

wavy-grained wood

19
Q

irregularity occuring in or on timber

A

defect

20
Q

portion of a branch that has been surrounded by subsequent growth

A

knot

21
Q

separation along the grain that occurs bet. rings of annual growth

A

shake

22
Q

separation of wood that occurs accross annual rings

A

check

23
Q

separation of wood caused by tearing apart of the wood cells

A

split

24
Q

perpendicular to flat face

A

bow

25
Q

perpendicular to edge

A

crock

26
Q

straight line accross the width

A

cup

27
Q

distortion caused by turning or winding

A

twist

28
Q

bark or lack of wood

A

wane

29
Q

result of heavy tools or things that dropped accidentally

A

torn grain

30
Q

cut through the planning of machine

A

chip mark

31
Q

any dry; crushed easily

A

dry rot

32
Q

caused by fungi; convert into grayish brown powder

A

wet rot

33
Q

moisture content is mor that 25%; fungi attack make it discolored

A

sap stain

34
Q

fungi attack the heartwood

A

heart rot

35
Q

sawn parallel

A

plain sawn lumber

36
Q

sawed so that wide surfaces extend approx.

A

quarter sawn lumber

37
Q

removing moisture

A

seasoning

38
Q

traditional method

A

air drying

39
Q

using a large chamber or oven

A

kiln drying

cmt wood (1 decks)

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