EXAMIANS
In Biot number, the characteristic length used is the ratio of the __________ of the solid.
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Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.)
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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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What is the unit of thermal conductivity ?
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A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is
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In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is
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'Duhring's plot' is of use in
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Vibrations in the tubes of a shell and tube heat exchanger is induced due to the
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In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate.
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For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in
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