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Maintenance cost is included in a life cycle comparison because it

  • A.may differ between the options and persists for the whole life
  • B.is always proportional to the capital cost
  • C.is the largest cost in every case
  • D.is not affected by the choice between the options

Answer: A

A measure that saves energy but demands frequent attention may cost more in total than one that saves less and is left alone, and only the whole-life view shows it. Where the two options have identical maintenance it drops out of the comparison.

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