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2. What is the concentration factor?

  • The amount of the resource that can be extracted at a profit using existing technology
  • The amount by which the metal is concentrated to make an ore deposit
  • The ratio of gangue minerals to ore minerals

3. What is the Cut-off grade?

  • The percentage of an ore that is economic
  • The minimum grade that is economic to mine
  • The maximum grade that is economic to mine

4. If they are useful, scarce metal will have a lower cut-off grade

  • True
  • False

5. The Grade is the amount of metal in the ore

  • True
  • False
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