DT Resistant Materials Quiz

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1. What is extrusion?

  • Material is melted. Forced through a die under pressure. Produces long, continuous strips.
  • Molten material forced into a closed mould under pressure. Melted by built in heaters. Mould opens, product removed.
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2. Give two properties of epoxy resin

  • hard, good electrical insulator
  • Soft, durable

3. What is shear strength?

  • The ability to resist strong sliding forces.
  • The ability to resist sudden shocks and blows.

4. Give two properties of urea formaldehyde

  • Hard, brittle, good electric insulator
  • Strong, good insulator

5. What is casting

  • An object made by pouring molten metal or other material into a mould.
  • Made by placing a molten substance in a vacuum bag


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