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GCSE Tech > Specialist - Timber > Flashcards

Specialist - Timber Flashcards

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1
Q

What does availability mean

A

The ease of sourcing and purchase

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2
Q

Why is bulk buying timber good

A

Reduces transportation costs
Often the goods will be cheaper if bought in bulk

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3
Q

What is unit cost

A

The cost of one unit of the material

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4
Q

What is total cost

A

The cost of all the materials purchased

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5
Q

What are some ways to change the colour of wood

A

Staining or painting

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6
Q

What does FSC stand for

A

Forest Stewardship council

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7
Q

What is the job of FSC

A

ensures the responsible management of forests, so they are felled responsibly and sustainably

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8
Q

How can woods be used in recycling

A

Made into MDF or similar composite boards

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9
Q

What is torsion

A

A twisting force applied to boths ends of a material

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10
Q

What is shear

A

Forces acting on the material in opposite directions, causing it to split

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11
Q

What is tension

A

A pulling force on the material

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12
Q

What is compression

A

An inward pushing force on the material

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13
Q

What is bending

A

Forces at an angle - particularly in sheet materials

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14
Q

What are some measures taken to woods, to stop timber from warping due to moisture or other conditions

A

Metal brackets which hold the wood in place

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15
Q

Why are hardwoods less likely to warp than softwoods

A

Because they are more dense and have a closer grain

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16
Q

What is the tensile strength of wood

A

Very high due to grain and structure

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17
Q

What an affect tensile strength of wood

A

water

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18
Q

What is the compression strength of wood

A

Excellent, it is very good at withstanding compression

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19
Q

What is the main factor which weakens all aspect of woods strength

A

Moisture

20
Q

What is the bending strength of wood

A

Liable to snap, however certain factors, such as heat or steam, can soften the grain enough to allow the wood to bend and set

21
Q

What is kerfing

A

Creating slots in the wood with a straw, allowing the wood to bend, and applying glue to the slits

22
Q

How can you increase the torsional strength of timber

A

By using metal brackets

23
Q

What are the 6 R’s, used to reduce the negative environmental impact of wood

A

Reduce, Reuse, Refuse, Recycle, Repair, Rethink

24
Q

What actions are B and Q taking to reduce the negative environmental impact of wood production

A

Giving away free wood, which would normally be discarded

25
Q

How is wood filler made

A

By using sawdust from soft wood and combining it with woodglue

26
Q

Which continent has seen an increase in forestry and trees

A

asia

27
Q

What is meant by mature timber

A

trees that is the correct age for timber

28
Q

How long do softwoods take to mature

A

10-15 years

29
Q

What is a company that uses soft wood

A

IKEA

30
Q

What is a company that uses hard wood

A

Oak furniture land

31
Q

What does debarking mean

A

The removal of bark from a tree

32
Q

What does PAR stand for and mean

A

Planed all round, a process done to wood planks to smooth them out

33
Q

What does rough sawn mean

A

Where the timber has not been planed, only sawn

34
Q

Which is better, rough saw or PAR

A

rough saw is cheape, but PAR takes varnish and finishes better

35
Q

What does seasoning mean

A

Drying wood so it can be used

36
Q

What are the two methods of seasoning

A

Air drying
Kiln drying

37
Q

How long does air drying take

A

1 year

38
Q

What is kiln drying

A

Using heat and pressure to remove moisture from wood, as well as killing bacteria and insects which could harm it

39
Q

What is the typical moisture content of wood when it is first felled

A

Over 50 percent

40
Q

What is the moisture content needed for exterior use of timber

A

20 percent

41
Q

What is the moisture content needed for interior uses of timber

A

15 percent (10 if it will be subject to lots of heat)

42
Q

How does plywood increase strength

A

By laminating the sheets so as the grains are running parallel to each other, which greatly increases in their strength

43
Q

Which boards are made using lamination techniques

A

Plywood and blockboard

44
Q

What are 3 forms which woods come in

A

Boards
Square sections
Dowel
Sheets

45
Q

What is continuous production

A

Production which runs 24 hours a week

46
Q

What is batch production

A

Batch products are produced in smaller quantities

47
Q
A

GCSE Tech (8 decks)

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