Heat and Mass Transfer Thermal conductivity of water in general with rise in temperature Decreases Increases May increase or decrease depending on temperature Remain constant Decreases Increases May increase or decrease depending on temperature Remain constant ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat transfer takes place as per Kirchoff's law Zeroth law of thermodynamics Second law of the thermodynamics First law of thermodynamic Kirchoff's law Zeroth law of thermodynamics Second law of the thermodynamics First law of thermodynamic 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 Absorptive power Emissivity Emissive power None of these Absorptive power Emissivity Emissive power None of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by Convection Radiation Both convection and conduction Conduction Convection Radiation Both convection and conduction Conduction ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as U/Cmin Cmin/U U/A.Cmin U.Cmin U/Cmin Cmin/U U/A.Cmin U.Cmin ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following has least value of conductivity? Water Air Glass Plastic Water Air Glass Plastic ANSWER DOWNLOAD EXAMIANS APP
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