Which of the following is a case of steady state heat transfer?

Which of the following is a case of steady state heat transfer? Correct Answer None of the above

IC Engine- Forced Convection
Air Preheaters- Air preheaters use the hot exhaust gas from the furnace to heat the incoming combustion air
Heating of building in winter-Conduction is heat traveling through a solid material. On hot days, heat is conducted into your home through the roof, walls, and windows.
Bissoy MCQ

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