Heat Transfer Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be 0.35 0.85 0.55 0.45 0.35 0.85 0.55 0.45 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by Keeping the heat transfer surface clean None of these Enhancing the fluid pumping rate Increasing the tube length Keeping the heat transfer surface clean None of these Enhancing the fluid pumping rate Increasing the tube length ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water. Boiling point (at the same pressure) Thermal conductivity Density Viscosity Boiling point (at the same pressure) Thermal conductivity Density Viscosity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer During crystallisation, formation of crystal can occur in __________ solution only. All of these Saturated Undersaturated Supersaturated All of these Saturated Undersaturated Supersaturated ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number) NPr-1 NPr-1/3 NPr1/3 NPr NPr-1 NPr-1/3 NPr1/3 NPr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Exit-fluid temperature > wall temperature Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature Graetz number > 100 Exit-fluid temperature > wall temperature Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature Graetz number > 100 ANSWER DOWNLOAD EXAMIANS APP
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