Heat Transfer The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law. Planck's Stefan-Boltzman Wien's displacement Kirchoffs Planck's Stefan-Boltzman Wien's displacement Kirchoffs ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The actual temperature drop across the heating surface of an evaporator depends on the All of these Solution being evaporated Pressure difference between the steam chest and the vapor space above the boiling liquid Liquid depth over the heating surface All of these Solution being evaporated Pressure difference between the steam chest and the vapor space above the boiling liquid Liquid depth over the heating surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 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 ? Plate Sphere Cube All of these Plate Sphere Cube All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fourier's law of heat conduction applies to __________ surfaces. Neither A and B Non-isothermal Both A and B Isothermal Neither A and B Non-isothermal Both A and B Isothermal ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Graetz number > 100 Exit fluid temperature = wall temperature Exit fluid temperature < wall temperature Exit-fluid temperature > wall temperature Graetz number > 100 Exit fluid temperature = wall temperature Exit fluid temperature < wall temperature Exit-fluid temperature > wall temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. None of these Backward feed Vacuum High pressure None of these Backward feed Vacuum High pressure ANSWER DOWNLOAD EXAMIANS APP
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