Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A Level-DT > Timbers > Flashcards

Timbers Flashcards

1
Q

What is a Coniferous tree

A

A coniferous tree is a tree that grows fast and has a looser grain and therefore produces softwood.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a Deciduous tree

A

Deciduous trees are trees that grow slowly and have a dense grain and so they produce hardwoods.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is Plywood

A

Plywood is a type of manufactured board that is multiple layers of cross grain wood glued together, can be easy to bend and is quite strong.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is Chipboard

A

Chipboard is a type of manufactured board that is made up of wood chips glued together, it is hard and strong and easy to finish.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is Sterling board

A

Sterling board is a type of manufactured board that is hard heavy and strong.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is Block board

A

Block board is stronger and heavier type of plywood due to the solid timber core with veneers laid on each edge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Hardboard

A

Hardboard is a type of manufactured board that is light quite hard and finishes well.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Name 6 timber stock forms

A

Rough sawn, Planed squared edge, Planed all round, Manufactured boards, Mouldings, Natural timber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name 6 Hardwoods

A

Oak, ash, mahogany, teak, birch, beech

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name 6 softwoods

A

Pine, spruce, fir, redwood, cedar, larch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name 6 manufactured boards

A

Plywood, chipboard, MDF, Sterling board, block board, hardboard

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why are natural woods less consistent than natural boards

A

Strength is effected by moisture
Highly combustible
More susceptible to insect or fungal attack
Is easier to break along the grain (anisotropic)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why is copper based materials often used in wood preservatives

A

It is naturally occurring and has anti-fungal properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How is wood most often enhanced+explain

A

Veneering
A slice of wood with grain glued onto the top of a wood panel and used to give nice finishes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the difference between a wastage and addition process

A

A wastage process takes away from a piece of material
whereas an addition process adds more material to it-usually in a joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Name 3 joints used in woodwork

A

Comb joint (dovetail)
Dowel joint
Mitre joint
Mortise and tenon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are knock down fittings

A

Knock down fittings are fitting that are designed to be able to come apart and be easy to re-assemble.
This makes the item easier to transport as it can be collapsed e.g. ikea furniture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is dry rot

A

Dry rot is the rot caused by poor seasoning which results in extra moisture-the rot is caused when the moisture exceeds 20%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is woodworm

A

Woodwork is when timber decays due to small beetles eating away at the wood and leave frass/wood dust behind

20
Q

What is milling

A

Milling is the process that cuts out a desired groove or cavity with a spinning piece in a path dictated by CAM-it can also change depth so the groove or cavity can be cut deeper at different parts

21
Q

What is routing

A

Routing is a process similar to milling but has a larger range of movement and can be used on larger objects

22
Q

What is turning (lathe)

A

Turning is a process where the piece is spun at high speed and a fixed cutting tool is slowly moved into contact with the wood-can also be done with metal but it more dangerous

23
Q

What are the two types of seasoning

A

Air seasoning and kiln seasoning

24
Q

What does seasoning wood do

A

Greater immunity to rot and decay
Increased strength and stability
Helps preservatives to penetrate
Helps make wood less corrosive to metals

25
Q

What is air and kiln seasoned wood used for

A

Air:outside
Kiln:inside

26
Q

What are some disadvantages of natural timber

A

Weaker when wet
Highly combustible
Highly susceptible to fungal or insect attack and rot
Anisotropic-not equal strength all over

27
Q

Describe rough sawn wood

A

Wood that comes directly from seasoning and still has rough edges from initial conversion

28
Q

Describe planed squared edge

A

Wood that has one edge planed accurately but the rest is still rough sawn

29
Q

Describe planed all round

A

Planed all round is wood that is planed all over to give it a smooth finish-this usually takes 3mm off each side

30
Q

What is SCL and LVL and what is it used in

A

Structural composite lumber and laminated veneer lumber-used in buildings and construction due to its even strength and being less prone to defects

31
Q

What are 3 reasons why wood might be finished

A

Preventing water absorption
Protection against decay
Protection against insect attack
Enhance appearance

32
Q

What is a stain

A

A stain is like a paint but it still shows off the grain of the wood, however it is not very protective

33
Q

What are three wood finishes that can be used to protect the wood from the weather

A

Polyurethane varnish
Water based paints
Pressure treating
Yacht varnish
Danish oil
Teak oil

34
Q

What is a butt joint

A

A butt joint is where two faces of wood are put into contact with an adhesive in between

35
Q

What is a dowel joint

A

A dowel joint is when two faces of wood are put into contact with small hardwood pegs-dowels- machined into both faces of the wood to help hold it together-can be used with adhesive too

36
Q

What is a mitre joint

A

A mitre joint is when two pieces are put into contact and glued however the pieces are sawn at an angle (usually 45°) so that when the joint is put together it makes an angled joint-used for picture frames

37
Q

What is a comb and dovetail joint

A

A comb joint is when the ends of two pieces are cut to have interspersed ends which can then be slotted together and glued which yields a stronger joint due to higher surface area
Dovetail is the same thing except the ends will be angles so there is mechanical strength as well as adhesive

38
Q

What is a mortise and tenon joint

A

A joint where one piece of wood has a rectangular housing-known as a mortise
and the other piece has a rectangular end sticking out-known as a tenon
Then adhesive is spread (usually in the mortise) and the joint is clamped together

39
Q

What is a housing joint

A

One piece of wood has a groove routed which is the same width as the depth of the second piece
Then the second piece is inserted, can be with glue if it is wanted to be a permanent joint

40
Q

What is a half lap joint

A

When both pieces have half of the depth sawn off and then lay on top of each other
then they can be glued or machined together

41
Q

What are some examples of knock down fittings and briefly explain

A

Modesty blocks-small polymer block that holds screws and allows them to be taken out
Barrel nut and bolt-a cross dowel and bolt is inserted and then tightened with an Allen key
Cam-lock connector-a metal dowel is drilled into the side of a piece and then a cam hole is drilled and a cam is put around the dowel-when the cam is rotated the dowel can come out

42
Q

What are the three types of turning

A

Turning on a:
Face plate-the timber is fixed on one face and spun the circumference is spun-used for bowls
Chuck-the timber is held between a set of jaws so it can be machined while turned
Between centres-work is held on a central axis where it is turned upon and the diameter is reduced-used for table legs

43
Q

What is lamination

A

Lamination is the process of bonding materials, typically wood veneers and wood layers

44
Q

What is steam bending

A

Steam bending is when combined steam and heat make a wood more malleable to bend along the grain and the wood is bent in a former when in this state.
Then the wood is left to cool and the former is taken off

45
Q

What does PVA stand for

A

Polyvinyl acetate

46
Q

What is jig or fixture

A

A jig and fixture both hold work in place while it is being worked on
A jig guides the tool also

A Level-DT (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions