Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) h0/K h0/2K K/h0 2K/h0 h0/K h0/2K K/h0 2K/h0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Kirchoff's law is applicable to Both A and B Only volumes and not to surfaces Monochromatic radiation only Total radiation only Both A and B Only volumes and not to surfaces Monochromatic radiation only Total radiation only ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law. Stefan-Boltzman's Wien's displacement None of these Planck's Stefan-Boltzman's Wien's displacement None of these Planck's ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally Decreases Increases exponentially Increases Remains unchanged Decreases Increases exponentially Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam economy in case of a triple effect evaporator will be 1 Between 0 and 1 > 1 < 1 1 Between 0 and 1 > 1 < 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) Independent of 't' ∝ √t ∝ 1/t ∝ t Independent of 't' ∝ √t ∝ 1/t ∝ t ANSWER DOWNLOAD EXAMIANS APP
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