Heat and Mass Transfer The most commonly used method for the design of duct size is the Dual or double method Velocity reduction method Equal friction method Static regains method Dual or double method Velocity reduction method Equal friction method Static regains method ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer An ordinary passenger aircraft requires a cooling system of capacity. 2 TR 4 TR 10 TR 8 TR 2 TR 4 TR 10 TR 8 TR ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as Reflectivity Transmissivity Intensity of radiation Emissivity Reflectivity Transmissivity Intensity of radiation Emissivity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to Square of temperature Fourth power of temperature Fourth power of absolute temperature Absolute temperature Square of temperature Fourth power of temperature Fourth power of absolute temperature Absolute temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The expression Q = ρ AT4 is called Newton Reichmann equation Joseph-Stefan equation Stefan-Boltzmann equation Fourier equation Newton Reichmann equation Joseph-Stefan equation Stefan-Boltzmann equation Fourier equation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal diffusivity of a substance is Directly proportional to the thermal conductivity Inversely proportional to density of substance All of these Inversely proportional to specific heat Directly proportional to the thermal conductivity Inversely proportional to density of substance All of these Inversely proportional to specific heat ANSWER DOWNLOAD EXAMIANS APP
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