The radiative heat transfer rate per unit area $$\left( {W/{m^2}} \right)$$ between two plane parallel gray surfaces (emissivity $$=0.9$$) maintained at $$400K$$ and $$300K$$ is ($${{\sigma _b} = }$$ Stephen Boltzmann constant $$5.67 \times {10^{ - 8}}\,\,W/{m^2}{K^4}$$)

GATE 1993 Mechanical Engineering PYQ — Heat Transfer

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Heat Transfer · Radiation

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Drill mode: parallel plates · 6/6

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Radiation has appeared in GATE Mechanical Engineering 21 times across 18 years (2014, 2015, 2016, 2022, 2023, ...).

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