OCR · Design and Technology · J310
GCSE Design and Technology: What factors are important to consider when selecting appropriate materials and/or system components when designing?
Material considerations · OCR GCSE Design and Technology (J310), specification point 5.2. Cards are generated from the exam board's own specification for "What factors are important to consider when selecting appropriate materials and/or system components when designing?", and every card links back to the page it came from. Specification © OCR — used with attribution.
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What two things are assessed when judging a specific material's working properties?
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How easy it is to work with, and how well it fulfils the product's required functions in different contexts.
Why consider a material's working properties, not just its physical properties?
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A material must be practical to cut, shape, join and finish during manufacture, not only perform well in the finished product.
Which material-selection factor covers appearance, colour and texture?
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Aesthetic attributes.
Which economic factor influences the choice of materials and components?
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The availability and cost of stock forms.
What are a material's 'stock forms'?
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The standard shapes and sizes in which it is supplied, e.g. sheet, bar, tube, rod or standard board sizes.
Which selection factor covers worker exploitation or offending cultural norms?
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Social, cultural and ethical considerations.
Which material property compares how strong a material is to how heavy it is?
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Strength to weight ratio — important when a product must be both strong and light.
Which material property describes resistance to scratching and indentation?
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Hardness.
Which property lets a material return to its original shape after a force is removed?
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Elasticity.
Which property lets a material be permanently bent or moulded without cracking?
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Plasticity.
A material's ability to withstand sudden shocks or blows is its ?.
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impact resistance
Which property describes how well a material resists attack by chemicals and weather?
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Corrosion resistance.
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