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An energy balance for a plant states that the energy input equals

  • A.the useful output plus the losses
  • B.the useful output alone
  • C.the losses alone
  • D.the output multiplied by the plant's efficiency

Answer: A

It is the first law applied to a boundary drawn round the plant, and nothing may be created or destroyed within it. Every term must be quantified for the balance to close, which is what forces the auditor to find the losses nobody had measured.

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