Heat Transfer Which one gives the monochromatic emissive power for black body radiation ? Stefan-Boltzman law Wien's law Planck's law Kirchhoffs law Stefan-Boltzman law Wien's law Planck's law Kirchhoffs law ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number is the ratio of Momentum diffusivity to mass diffusivity Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to momentum diffusivity Momentum diffusivity to mass diffusivity Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to momentum diffusivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because Cost of equipment is lower There is no mist formation Heat transfer co-efficient are high There is no risk of contamination Cost of equipment is lower There is no mist formation Heat transfer co-efficient are high There is no risk of contamination ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Film boiling is usually not desired in commercial equipments, because it is not economic it is difficult to maintain the heat transfer rate is low in view of the large temperature drop. @ none of the listed here it is not economic it is difficult to maintain the heat transfer rate is low in view of the large temperature drop. @ none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Forced circulation evaporators are normally used for concentrating liquids having Neither A nor B High viscosity Scaling characteristics Both A & B Neither A nor B High viscosity Scaling characteristics Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for Cylinder Cube Sphere Equal for all the three Cylinder Cube Sphere Equal for all the three ANSWER DOWNLOAD EXAMIANS APP
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