Heat Transfer The thickness of condensate layer in filmwise condensation depends on the All of these Condensation rate Liquid flow rate from the surface Surface configuration All of these Condensation rate Liquid flow rate from the surface Surface configuration ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product Concentrate heat sensitive materials Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product Concentrate heat sensitive materials Facilitate forward feeding in multiple effect evaporation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires None of these Lower maintenance cost Less heating surface More space None of these Lower maintenance cost Less heating surface More space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A sphere of radius 'R₁' is enclosed in a sphere of radius 'R₂'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is (R₁/R₂)2 1 R₂/(R₁+R₂) (R₁/R₂)2 1 R₂/(R₁+R₂) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical? > 1 < 1 None of these 1 > 1 < 1 None of these 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is 555 55.5 0.15 0.55 555 55.5 0.15 0.55 ANSWER DOWNLOAD EXAMIANS APP
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