EXAMIANS
The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by
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With the increase of temperature, the Col-burn jH factor
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A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?
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If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will
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The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are
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Kirchoff's law is applicable to
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A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m².K. The Biot number is
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In a forward feed multiple effect evaporator, the pressure is
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Leidenfrost point is a term concerned with the
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Heat transfer co-efficient (h1) for liquids increases with
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