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Wood Technology > Term 2- Half Yearly Exam > Flashcards

Term 2- Half Yearly Exam Flashcards

0
Q

Uses of Particleboard?

A

Kitchen doors, fire doors, mostly internal uses e.g. shelving

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1
Q

Sources of Particleboard?

A

Glued together wood particles, from trimming with an adhesive and under heat and pressure, from strong grainless sheets

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2
Q

Disadvantages of particleboard?

A

All grades except high density tend to soak up water, swell and breakdown

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3
Q

Sources of MDF?

A

Hardboard made from wood fibres glued together under heat and pressure.

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4
Q

Advantages of MDF

A

Dense, stiff, no knots, easily machined

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5
Q

Disadvantages of MDF

A

Contain urea formaldehyde maybe released through cutting and sanding.

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6
Q

Uses of MDF

A

Display cabinets, wall-panels, storage units

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7
Q

Sources of plywood

A

Laminating odd numbers of thin veneered arranged with grain direction at right angles, alternating layers

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8
Q

Advantages of plywood

A

Strong, the more veneers used the stronger it becomes

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9
Q

Uses of Plywood

A

Interior and exterior, wall panelling, furniture

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10
Q

Sources of hardboard

A

Eucalypt chips are pulped with water and spread on a mat on a moving wire mesh screen. Mats compressed forming tough, dense sheets

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11
Q

Advantages of hardboard

A

3 types available

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12
Q

Disadvantages of hardboard

A

Cannot be used outside

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13
Q

Uses of hardboard

A

Cheaper option than plywood, cupboard backs, drawer bottoms

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14
Q

What are some edge treatments

A

Plastic laminates bonded to particle board

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15
Q

What is a veneer

A

A thin layer of real wood applied to substrate material. Provide outward aesthetics of solid wood.

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16
Q

What is marine ply?

A

Type of plywood bonded with waterproof adhesive used in boat hulls

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17
Q

What is Melamine wood

A

Less expensive alternative to wood, made up of core particle board or MDF bonded with melamine resin

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18
Q

What are manufactured boards used for?

A

Kitchen cupboards, cabinets, counters, shelving

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19
Q

Changes brought about by introduction of manufactured boards?

A
  • Furniture manufacture became less labour intensive, therefore cheaper.
  • Mass production of furniture increased
  • CNC machines developed to facilitate mass production process.
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20
Q

What is knock-down furniture?

A

Usually made from mass produced panels which can be assembled in various arrangements to create a range of different units.

21
Q

What is flat pack furniture?

A

A piece of furniture or equipment that is sold in pieces packed flat in a box for easy transport and assembled by the buyer.

22
Q

Compare furniture of the past to furniture of today

A

Furniture of past- handmade, intricate designs, expensive timber,
Furniture of today- made by machines, simple, cheap timber

23
Q

What is a cnc laser cutter

A

Cutting things controlled by a computer

24
Q

What is a cnc router?

A

Similar to manual router, designed by computer, sent to router for hard copy with precision and accuracy in cuts.

25
Q

Use of Butt Hinge

A

Traditional cabinet door hinges, mainly used on cabinets. Shows only knuckle of hinge when door is shut

26
Q

Use of recessed hinge

A

Used in similar situations to butt hinge except not let into door carcass. One leaf fits into recess of other leaf when door is closed

27
Q

Use of flap hinge

A

Open 180* used where door or flap opens into horizontal position.

28
Q

Use of continuous or piano hinge

A

Screwed in along full length, used in situation where butt hinge not provide sufficient strength

29
Q

Use of reflex hinge

A

Used where opening angle more than 180* is required.

30
Q

Use of concealed hinge

A

Most common cabinet hinge, many different types and opening angles

31
Q

Use of d handle

A

Used on cupboard doors and drawers

32
Q

Use of knob

A

Used on drawers as well as doors

33
Q

Use of flush pull

A

Designed for sliding doors, let in flush with surface of drawer

34
Q

Part of catches

A

Striker- fitted to door

Retainer- fitted to inside of carcase or under side of shelf

35
Q

Use of ball catch

A

Available as single or twin ball catch, retaining pressure adjustable

36
Q

Use of magnetic catch

A

Generally made from plastic with steel plate attached to striker and rigid magnet attached to retainer

37
Q

Single extending draw runner

A

Do not extend full depth of drawer

38
Q

Fully extending drawer runner

A

Have an extra telescopic extension allows drawer to extend

39
Q

Issues with forest clearing

A

Forests produce oxygen we breathe as leaves absorb CO2
Destruction natural habitat for animals
Land degradation and erosion
Climate Change

40
Q

Environmental Impacts- Manufacturing

A

Cost of material will increase, reduction in supplies
Supply of materials need to be managed well
Imported timbers can be cheaper not good for local economy
Improve milling and selection techniques reduced waste

41
Q

Environmental Impacts- Timber

A

Reforestation- continued replanting of forest

Plantation Farming- farming of trees as long term commercial crop

42
Q

Environmental impacts- individual

A

Air quality
Noise Pollution
Industrial Waste

43
Q

Factors affecting quality of assembly

A

Quality of the Work
Working Time
Efficiency

44
Q

What Face marks should be used

A

Face edge- outer side of project

Face side and edge marks- two best surfaces

45
Q

Working time of PVA glue

A

10 minutes

46
Q

Why dies end grain require two coats of wood

A

First coat absorbed leaving little at contact surface for adhesion

47
Q

What position are the rails when cramping

A

Should be parallel to rails. Waste blocks used to protect edges

48
Q

When apply clamps

A

Keep things flat two underside one upper of not pressure might cause boards to bow upwards

49
Q

Ways of checking a job is square

A

Testing with try square

Diagonals, regular frames / carcases

50
Q

What is wind

A

Wind refers to the flatness of a board or frame

51
Q

If a frame is in wind, it means

A

Surfaces are twisted, sometimes due to seasoning process

Wood Technology (1 decks)

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