Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

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Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an Answer: All (a), (b) and (c)

Question context

This question is part of ⚗️ Chemical Engineering within the broader 🛠️ Engineering Essentials subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.