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A plant's specific energy consumption rises while its total consumption falls. The likeliest reason is

  • A.the plant has become more efficient
  • B.the tariff has risen over the period
  • C.the measurement period was unrepresentative
  • D.output has fallen faster than consumption

Answer: D

Fixed loads such as lighting, ventilation and idling compressors run whatever the output, so a plant at half capacity spends more per tonne while spending less in total. It is why the two figures must always be read together.

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