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 NPr-1/3 NPr1/3 NPr-1 NPr NPr-1/3 NPr1/3 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not used as a medium for high temperature heating ? liquid metal None of the listed here dowtherm mercury liquid metal None of the listed here dowtherm mercury ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is 1-2 heat exchanger 2-4 heat exchanger 3-2 heat exchanger 1-1 heat exchanger 1-2 heat exchanger 2-4 heat exchanger 3-2 heat exchanger 1-1 heat exchanger ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 51 min 44 min 22 min 15 min 51 min 44 min 22 min 15 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Calburn analogy is applicable for the value of Prandtl number from 0.001 to 1 120 to 400 0.5 to 5 0.6 to 120 0.001 to 1 120 to 400 0.5 to 5 0.6 to 120 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is 1 >1 0 between 0 and 1 1 >1 0 between 0 and 1 ANSWER DOWNLOAD EXAMIANS APP
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