Heat and Mass Transfer The critical thickness of insulation for a sphere is h₀/k k/h₀ 2k/h₀ h₀/2k h₀/k k/h₀ 2k/h₀ h₀/2k ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of air with rise in temperature Remain constant Decreases Increases May increase or decrease depending on temperature Remain constant Decreases Increases May increase or decrease depending on temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The emissive power of a body depends upon its Temperature Physical nature Wave length All of these Temperature Physical nature Wave length All of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity) X = 0, a + p = 1 P = 0, x = 1 and a = 0 P=1, T = 0 and a = 0 P = 0, x = 0 and a = 1 X = 0, a + p = 1 P = 0, x = 1 and a = 0 P=1, T = 0 and a = 0 P = 0, x = 0 and a = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for Three dimensional cases only Two dimensional cases only One dimensional cases only Regular surfaces having non-uniform temperature gradients Three dimensional cases only Two dimensional cases only One dimensional cases only Regular surfaces having non-uniform temperature gradients ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The radiation emitted by a black body is known as Black radiation Total radiation All of these Full radiation Black radiation Total radiation All of these Full radiation ANSWER DOWNLOAD EXAMIANS APP
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