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Assertion (A): A plant with very wet raw materials may find waste heat power generation uneconomic.
Reason (R): The preheater exhaust is already needed to dry the feed in the raw mill.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the conflict: the same stream of hot gas cannot do both duties, so the drying requirement takes precedence and leaves too little heat for a worthwhile turbine. Drying the feed always takes precedence over generating power.

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