Timbers Flashcards

1
Q

What type of trees do hardwoods come from?

A

Deciduous trees with broad leaves.

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2
Q

How long does it typically take for hardwood trees to grow?

A

60-100 years.

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3
Q

What is a characteristic of hardwood growth rings?

A

Much smaller than softwood, making the grain closer.

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4
Q

What type of trees do softwoods come from?

A

Coniferous trees with needle-like leaves.

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5
Q

How long does it typically take for softwood trees to grow?

A

20-30 years.

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6
Q

Where do softwood trees naturally grow?

A

Colder regions such as Alpine climates.

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7
Q

What are manufactured timbers made from?

A

Leftover wood such as sawdust and wood chippings.

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8
Q

What is a benefit of manufactured timbers compared to hardwoods and softwoods?

A

They are much cheaper.

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9
Q

What is the appearance of Beech wood?

A

Slight pink tint, close grain.

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10
Q

What are the characteristics of Mahogany?

A

Dark-reddish colour, very close grain, cuts and polishes easily.

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11
Q

What is unique about Oak wood?

A

Moderate-brown colour with unique and attractive grain markings.

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12
Q

What is the texture of Balsa wood?

A

Pale and wide-spaced grain.

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13
Q

What is Jelutong wood used for?

A

Model making and vacuum forming moulds.

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14
Q

What is a characteristic of Birch wood?

A

Light colour with an even grain.

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15
Q

What are the properties of Ash wood?

A

Strong and flexible, finishes well.

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16
Q

What is the appearance of Pine wood?

A

Pale coloured with aesthetically pleasing grain.

17
Q

What is a characteristic of Cedar wood?

A

Lightweight, pale colour with even texture.

18
Q

What makes Larch wood durable?

A

It is resistant to water.

19
Q

What is the appearance of Medium-density fibreboard (MDF)?

A

Smooth, light brown.

20
Q

What is Plywood made of?

A

Layers of veneer glued at 90-degree angles.

21
Q

What happens to Chipboard when exposed to moisture?

A

It swells up and falls apart.

22
Q

What can deforestation lead to?

A

Soil erosion and an increase in global warming.

23
Q

What is a consequence of increased timber demand?

A

Forest management struggles due to slow tree maturation.

24
Q

What is the issue with recycled materials?

A

The gluing process makes it difficult to recycle the timber a second time.

25
What types of boards can be made from recycled timber?
* Plywood * Medium-density fibreboard (MDF) * Chipboard * Blockboard
26
True or False: MDF can be recycled.
False.
27
What environmental impact does transportation of timber have?
It adds to the carbon footprint.
28
What are the standard stock forms of timber?
* Rough Cut * PSE (Planed Square Edge) * PAR (Planed All Round) * Regular sections * Mouldings * Dowels * Sheets
29
What is one use of timber in construction?
Used for making ladders, tool handles, and walking sticks.