Heat and Mass Transfer The thermal diffusivities for solids are generally Less than those for liquids More or less same as for liquids and gases More than those for liquids and gases Less than those for gases Less than those for liquids More or less same as for liquids and gases More than those for liquids and gases Less than those for gases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following is the case of heat transfer by radiation? Heat received by a person from fireplace Blast furnace Heating of building Cooling of parts in furnace Heat received by a person from fireplace Blast furnace Heating of building Cooling of parts in furnace ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In case of liquids and gases, the heat transfer takes place according to None of these Radiation Convection Conduction None of these Radiation Convection Conduction ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called None of these Emissive power Emissivity Absorptive power None of these Emissive power Emissivity Absorptive power ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In regenerator type heat exchanger, heat transfer takes place by Generation of heat again and again Direct mixing of hot and cold fluids A complete separation between hot and cold fluids Flow of hot and cold fluids alternately over a surface Generation of heat again and again Direct mixing of hot and cold fluids A complete separation between hot and cold fluids Flow of hot and cold fluids alternately over a surface ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Unit of thermal conductivity in S.I. units is J/m °K sec Option (B) and (C) above W/m °K J/m² sec J/m °K sec Option (B) and (C) above W/m °K J/m² sec ANSWER DOWNLOAD EXAMIANS APP
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