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The following year the same plant uses 4400 MWh for 10 000 t. Its specific consumption has

  • A.risen to 440 kWh/t despite the lower total
  • B.fallen to 440 kWh/t
  • C.stayed at 400 kWh/t
  • D.fallen to 360 kWh/t

Answer: A

Correct answer: risen to 440 kWh/t despite the lower total

\[ \frac{4{,}400{,}000}{10{,}000} = 440\ \mathrm{kWh/t}. \] Consumption has fallen by 400 MWh and performance has worsened, because output fell further. This is exactly why specific consumption is tracked rather than the total - a bill that falls in a bad year says nothing good about the plant.

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