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The main practical reason for filtering beer before packaging is to

  • A.Raise the alcohol content of the finished beer
  • B.Convert the last of the starch into sugar
  • C.Give clarity and remove remaining yeast
  • D.Increase the bitterness contributed by the hops

Answer: C

Correct answer: Give clarity and remove remaining yeast

Filtration produces the bright appearance most packaged beers are expected to have and removes the yeast that would otherwise continue to work and settle in the bottle. It is not a substitute for pasteurisation unless the membrane is fine enough to be sterilising, which requires a much tighter filter than clarification alone.

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