Heat and Mass Transfer The use of heat exchangers is made in All of these Condensers and evaporators in refrigeration and air conditioning units Condensers and boilers in steam plants Radiators in automobile All of these Condensers and evaporators in refrigeration and air conditioning units Condensers and boilers in steam plants Radiators in automobile ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A composite slab has two layers of different materials with thermal conductivities k₁ and k₂. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be 2 k₁ k₂/ (k₁ + k₂) (k₁ + k₂)/ k₁ k₂ k₁ k₂ (k₁ + k₂) 2 k₁ k₂/ (k₁ + k₂) (k₁ + k₂)/ k₁ k₂ k₁ k₂ (k₁ + k₂) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Absorptivity of a body will be equal to its emissivity At one particular temperature At critical temperature When system is under thermal equilibrium At all temperatures At one particular temperature At critical temperature When system is under thermal equilibrium At all temperatures ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Emissivity of a white polished body in comparison to a black body is Higher Same Depends upon the shape of body Lower Higher Same Depends upon the shape of body Lower ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of radiation mainly depends on Type of surface of body All of these Nature of body Temperature of body Type of surface of body All of these Nature of body Temperature of body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Reynolds number is the ratio of None of these Inertia force to viscous force Energy transferred by convection to that by conduction Kinematic viscosity to thermal diffusivity None of these Inertia force to viscous force Energy transferred by convection to that by conduction Kinematic viscosity to thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
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