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A driving cycle in emissions testing is

  • A.A defined speed against time schedule run on a chassis dynamometer
  • B.The engine's thermodynamic cycle
  • C.A durability test over many hours
  • D.The sequence of catalyst regeneration events

Answer: A

It is meant to represent typical use so that vehicles can be compared on a common basis. How well the cycle reflects real driving has been a long-running controversy, and real driving emissions testing was introduced to address it.

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