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Tech - Core theory > Key Points > Flashcards

Key Points Flashcards

1
Q

What is paper classed as

A

anything less than 200gsm

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2
Q

What is gsm

A

grams per square meter

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3
Q

What is board classed as

A

over 200gsm

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4
Q

What can adding materials do to paper

A

make it stronger, waterproof or insulator of heat

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5
Q

What are hardwoods

A

woods from deciduous trees

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6
Q

What are softwoods

A

woods from coniferous trees

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7
Q

What is the difference between hardwoods and softwoods regarding maturation

A

hardwoods can take ten times longer to mature

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8
Q

What comes in larger sizes natural timbers or manufactured boards

A

manufactured boards

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9
Q

What is the benefit to manufactured boards vs natural timbers

A

more stable and won’t split or twist

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10
Q

What can be added to manufactured boards to improve appearance

A

veneers and laminates

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11
Q

What are ferrous metals and what is a common property

A

metals containing iron and usually magnetic

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12
Q

What are non-ferrous metals

A

metals w/o ironW

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13
Q

What are alloys

A

combinations of two or more metals with other elements

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14
Q

What can thermoforming polymers do

A

repeatedly heated, formed and cooled

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15
Q

What can thermosetting polymers do

A

only be formed with heat once

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16
Q

What is an example of thermosetting polymer

A

eurea formaldahyde

17
Q

What can thermosetting polymers NOT be

A

recycled

18
Q

Where can natural fibres come from

A

plant or animal sources

19
Q

What are synthetic fibres manufactured from

A

oil-based chemicals

20
Q

What are examples of synthetic fibres

A

polyester
polyamide
elastane

21
Q

What are plain weave fabrics like

A

strong and hardwearing

22
Q

What are non-woven fabrics made from

A

directly from fibres without woven or knitted

23
Q

What are knitted fabrics made from

A

yarns looped together to make looser flexible fabrics

Tech - Core theory (22 decks)

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