GATE Heat Transfer: Unsteady conduction and lumped parameter systems – Previous Year Questions

2 GATE previous year questions on Unsteady conduction and lumped parameter systems (Heat Transfer, Mechanical Engineering) with answers and explanations, from every paper.

1. GATE 2023 ME Q47 (2 marks, Multiple select) – A very large metal plate of thickness d and thermal conductivity k is cooled by a stream of air at temperature T = 300 K with a heat transfer…
2. GATE 2026 ME Q35 (1 mark, Numerical answer) – A sphere of radius 5 mm is initially in equilibrium at 400 °C in a furnace. It is suddenly removed from the furnace and dipped in a well-stirred water…