In case the hydrodynamic and thermal boundary layers are identical for a fluid flowing over a heated plate

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Q. In case the hydrodynamic and thermal boundary layers are identical for a fluid flowing over a heated plate

(A) The value of Prandtl number must be 0.5
(B) The plate surface must be smooth
(C) The plate must be of low thermal conductivity
(D) The value of Prandtl number thust be 1

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✅ Correct Answer: (A) The value of Prandtl number must be 0.5

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