Key term
CCEA A-Level Technology and Design 8900
Material Selection and Wood
Metals
Plastics
Composite and Emerging Materials
Processing Materials
Product Analysis and Design Communication
Design for Manufacture, Quality and Safety
Electronic Control SystemsOption A
Topic overviewControl systems, feedback and electronics safetyResistors, Ohm's law and power ratingsCapacitors and RC timingPotential dividers, sensors and comparatorsSwitches, pull-up and pull-down resistorsOutput devices and LEDsTransistors, Darlington pairs and thyristorsLogic gates, truth tables and flip-flops555 monostable and astable timers
Microelectronic Control SystemsOption A
Topic overviewMicrocontroller systems, ADCs and DACsStrain gauges and bridge circuitsOptical switches, encoded discs and Schmitt triggersOp-amp amplifiers and gainZener diodes and voltage regulatorsKarnaugh maps and binary countersSeven-segment, LCD and dot matrix displaysPIC flowcharts and programmingDC motors, stepper motors and driver circuits
Mechanical and Pneumatic ComponentsOption B
Topic overviewOpen and closed loop mechanical and pneumatic controlSafe working with compressed air and mechanismsLevers, linkages and momentsGear types and gear trainsPulleys, belts, chains and shaft fixingsCams, cranks and converting motionCompressed air supply and pneumatic valvesCylinders, shuttle valves, restrictors and reservoirsPneumatic circuits for logic, timing and speed control
Mechanical and Pneumatic SystemsOption B
Topic overviewHydraulics, system limitations and plant safetyTorque, work, power and air consumptionVacuum handling, proximity sensors and 5/3 valvesSequential and cascade pneumatic circuitsCam profiles and follower displacement diagramsGear geometry, pulley blocks and ratchetsToggles, treadles, shafts and couplingsFriction, brakes and clutchesBearings, lubrication and seals
Designing and Manufacturing ProductsOption C
Topic overviewResearch, questionnaires and specificationsIdea generation, critiques and computer simulationManufacturing planning and product evaluationCFRP, GRP, Kevlar and tungsten carbideSmart materials, nanotechnology and biophotovoltaicsIsometric, perspective and assembly drawingLaminating, steam bending, cutting and printing processesRisk assessment and product safety lawScales of production, JIT and cell productionQuality assurance, ISO 9001 and continuous improvementDesign influences and intellectual property rights
Product Design in Industry and SocietyOption C
Topic overviewLife-cycle environmental impact and climate changeThe 6Rs, waste and environmental legislationSustainable metals, plastics and degradable polymersProduct life cycles, consumer types and relaunchesCAD, CAM, 3D scanning and quick-change mouldingMarket pull, technology push and market strategyPrice, place and promotionJigs, fixtures and ICT in quality controlDesign for maintenance, inclusion and scale productionRendering, typography and presentationDyson, Baylis, Memphis and Apple
Product Development
Product and System Design and Manufacture
Material Selection and Wood
Pine, ash, beech, oak and mahogany
- 3 things to know
- AS 1 Paper 1
Overview
The appearance, properties, working characteristics and uses of pine, ash, beech, oak and mahogany, outdoor treatment, steam bending, quarter-sawn oak and responsible sourcing.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Give two typical uses of pine and a reason for each.
Key term
Why must pine be treated before it is used outdoors?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Describe the appearance and working characteristics of pine.
Model answer
Pine is a pale, straw-coloured softwood with darker growth rings and knots. Pine is light and easy to work, although knots can be hard and resinous.
- 2
Give two typical uses of pine and a reason for each.
Model answer
Pine is used for construction timber such as roof trusses because it is cheap and fairly strong. Pine is used for low-cost furniture because it is easy to work and join.
- 3
Why must pine be treated before it is used outdoors?
Model answer
Pine has low natural durability and rots when repeatedly wet. A preservative or paint system protects it from fungal decay and insect attack.
- 4
Describe the properties of ash.
Model answer
Ash is a pale, open-grained hardwood that is tough, elastic and resistant to shock. Ash is not durable outdoors and rots if left untreated.
- 5
Why is ash used for hammer and axe handles?
Model answer
Ash is tough and slightly flexible, so it absorbs repeated shock without splitting. The straight grain gives strength along the length of the handle.
- 6
Why does ash bend well when steamed?
Model answer
Ash has long, tough fibres that stretch and compress without breaking once softened by steam. Bentwood chair parts are often made from ash.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Material Selection and Wood, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.