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The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)

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The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet) Answer: Vᵇ = 0.5 V cos α

Question context

This question is part of ⚙️ Mechanical Eng 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.