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A Level DT > Timbers > Flashcards

Timbers Flashcards

1
Q

Types of deciduous trees?

A

Oak
Ash
Mahogany
Teak
Birch
Beech

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2
Q

Types of coniferous trees?

A

Pine
Spruce
Douglas fir
Redwood
Cedar
Larch

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3
Q

Types of manufacture boards?

A

Plywood
Marine plywood
Aero ply
Flexible plywood
Chipboard
MDF (Medium density-fibreboard)

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4
Q

Properties of coniferous/softwoods?

A

Grow in cooler climates
Have a loser grain structure
Usually softer to work
Trees grow tall and straight
Evergreen- don’t lose their needles

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5
Q

Properties of deciduous/hardwoods?

A

Have a tighter grain
Can be very expensive
Found in tropical or sub-tropical climates
Usually quite hard
Seeds are enclosed in fruits
Slower growing

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6
Q

Properties of manufacture boards?

A

Are inexpensive
Timber sheets which are produced by gluing wood fibres
Are made using ware
Covered in a thin layer of real wood

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7
Q

What are performance characteristics expressed in?

A

Physical
Mechanical
Thermal
Electrical
Chemical

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8
Q

Name types of properties?

A

Malleability
Ductility
Hardness
Durability
Toughness
Elasticity
Tensile strength
Compression weight

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9
Q

Name types of performance characteristics?

A

Warpage
Shrinkage
Splitting
Joining
Forming
Toxicity
Moisture resistance

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10
Q

Name types of stock forms?

A

Rough Sawn
Planed Square Edge
Planned all round
Natural timber
Manufacture board
Mouldings

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11
Q

What is seasoning?

A

The removal of excess moisture from newly sawn timber.

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12
Q

Types of seasoning?

A

Natural seasoning
Kiln seasoning

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13
Q

Advantages of natural seasoning?

A

Cheap
Some say the timber is stronger than kiln seasoned

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14
Q

Disadvantages of natural seasoning?

A

Very slow
Bugs and fungus survive
Water content hard to control
Ends of planks can split

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15
Q

Advantages of kiln seasoning?

A

Accurate water content
12% or lower moisture content
Kills bugs and fungus
Fast

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16
Q

Disadvantages of kiln seasoning?

A

Expensive

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17
Q

Name types of timber defects?

A

Splitting
Knots
Dry rot
Woodworm

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18
Q

What is splitting?

A

Occurs at the end of a plank
Ends are cut off
Generally unavoidable

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19
Q

What are knots?

A

Knots are where a branch was attached to a tree
Live knots are decorative
Dead knots need to be avoided

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20
Q

What is dry rot?

A

Caused by incorrect seasoning or poor building maintenance. Caused by timber being over 20% moisture content.

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21
Q

What is woodworm?

A

A beetle that lays eggs on timber. The larvae eats the wood for a year then emerge as adult beetles in the spring. Holes and wood dust are a sign of woodworm

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22
Q

Properties of pine?

A

Straight grain
Knotty

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23
Q

Properties of spruce?

A

Straight grain
Resistance to splitting

24
Q

Properties of Douglas fir?

A

Stable
Resistance to corrosion
Straight or slightly wavy grain

25
Q

Properties of redwood?

A

Fairly light
Aesthetically pleasing
Insect resistant
Rot-proof
Fire-resistant

26
Q

Properties of cedar?

A

Straight grain
Sound dampening
Resistance to moisture

27
Q

Properties of larch?

A

Attractive grain patterns

28
Q

Properties of oak?

A

Attractive grain
Good weather resistant
Contains tannic acid

29
Q

Properties of ash?

A

Attractive open flexible grain

30
Q

Properties of mahogany?

A

Rich dark red colour
Interlocking grain

31
Q

Properties of teak?

A

Straight grain
Natural oils resist moisture, acids and alkalis

32
Q

Properties of birch?

A

Resists warping
Straight close grain

33
Q

Properties of beech?

A

Close grain
Does not impart taste on food

34
Q

Properties of plywood?

A

Good strength in all directions
No grain weakness

35
Q

Properties of marine plywood?

A

Resistant to moisture
Resistant to fungal attack

36
Q

Properties of aeroply?

A

Lightweight
Available in thin sheets

37
Q

Properties of chipboard?

A

Wood chips compressed with urea formaldahyde

38
Q

Properties of MDF?

A

Two smooth faces
Available veneered

39
Q

Uses of oak

A

Furniture
Flooring
Cladding

40
Q

Use of Ash

A

Tool handles
Ladders
Sports goods

42
Q

Uses of teak

A

Outdoor furniture
Laboratory benches

43
Q

Uses of birch

A

Veneers used for construction
Indoor panelling

44
Q

Uses of beech

A

Bowls
Chopping boards
Tools

45
Q

Uses of pine

A

Construction work
Interior joinery

46
Q

Uses of spruce

A

Indoor furniture

47
Q

Uses of Douglas fir

A

Plywood construction
Joinery and construction work

48
Q

Uses of larch

A

Garden furniture
Decking
Fencing

49
Q

Uses of cedar

A

Sheds
Beehives
Exterior cladding

50
Q

Uses of plywood

A

Floorboards
Indoor furniture
Structural work

51
Q

Uses of marine plywood

A

Boat dashboards
Boat lockers

52
Q

Uses of aero ply

A

Gliders
Laminated furniture

53
Q

Uses of flexible plywood

A

Curved panels
Laminated furniture

54
Q

Uses of chipboard

A

Kitchen worktops
Flat-pack furniture

55
Q

Properties of flexible plywood?

A

Open grained allows sheet to flex

56
Q

Uses of MDF

A

Model making
Bookcases
Desks

58
Q

Uses of mahogany

A

Indoor furniture
Shop fittings
Cabinets

A Level DT (8 decks)

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