EXAMIANS
Thermal conductivity of water _________ with rise in temperature.
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The ratio of the energy absorbed by the body to total energy falling on it is called
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According of Kirchhoff's law
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The heat transfer by conduction through a thick cylinder (Q) is given by (where T₁ = Higher temperature, T₂ = Lower temperature, r₁ = Inside radius, r₂ = Outside radius, l = Length of cylinder, and k = Thermal conductivity)
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Emissivity of a white polished body in comparison to a black body is
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A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100°C and leaves at 60°C. A cold fluid enters the heat exchanger at 40°C. The mean temperature difference between the two fluids is
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The natural convection air cooled condensers are used in
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The value of the wavelength for maximum emissive power is given by
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The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x. The term x/kA is known as
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Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by
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