Heat Transfer A body is called grey if the monochromatic emissivity of the body is Different for all wavelengths Unity Same for all wavelengths Zero Different for all wavelengths Unity Same for all wavelengths Zero ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law. Logarithmic Hyperbolic Linear Parabolic Logarithmic Hyperbolic Linear Parabolic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law. Kirchoffs Planck's Wien's displacement Stefan-Boltzman Kirchoffs Planck's Wien's displacement Stefan-Boltzman ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat waves Travel in straight line Can not pass through vacuum Both B and C Can be reflected by a mirror Travel in straight line Can not pass through vacuum Both B and C Can be reflected by a mirror ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Exit fluid temperature < wall temperature 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 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of evaporators, liquid entrainment results primarily due to high vacuum in the evaporator high heat transfer rate high heat transfer rate foaming of the solution high vacuum in the evaporator high heat transfer rate high heat transfer rate foaming of the solution ANSWER DOWNLOAD EXAMIANS APP
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