Heat and Mass Transfer A perfect black body is one which Reflects all heat Is black in colour Transmits all heat radiations Absorbs heat radiations of all wave lengths falling on it Reflects all heat Is black in colour Transmits all heat radiations Absorbs heat radiations of all wave lengths falling on it ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called None of these Conduction Convection Radiation None of these Conduction Convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal diffusivity is Function of temperature A physical property of the material A dimensionless parameter Used as mathematical model Function of temperature A physical property of the material A dimensionless parameter Used as mathematical model ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water _________ with rise in temperature. Remain same Decreases Increases May increase or decrease depending upon temperature Remain same Decreases Increases May increase or decrease depending upon temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer When heat is transferred by molecular collision, it is referred to as heat transfer by Conduction Scattering Radiation Convection Conduction Scattering Radiation Convection ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be insulated by two insulating materials put over each other. For best results Whether to put inferior OIL over pipe or the better one would depend on steam temperature Both may be put in any order Better insulation should be put over pipe and better one over it Inferior insulation should be put over pipe and better one over it Whether to put inferior OIL over pipe or the better one would depend on steam temperature Both may be put in any order Better insulation should be put over pipe and better one over it Inferior insulation should be put over pipe and better one over it ANSWER DOWNLOAD EXAMIANS APP
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