Heat Transfer Prandtl and Reynolds analogy are same, when Prandtl number is 1 0.5 > 2 1.5 1 0.5 > 2 1.5 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 0.55 55.5 0.15 555 0.55 55.5 0.15 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The equation, Nst = f/2, is the __________ analogy. Prandtl Colburn None of these Reynolds Prandtl Colburn None of these Reynolds ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat sensitive materials can be concentrated in an evaporator employing High pressure Vacuum High residence time None of these High pressure Vacuum High residence time None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a cooling tower, water becomes cool by Loosing latent heat Vaporisation due to heat loss to air Loosing sensible heat Heat transfer to surroundings Loosing latent heat Vaporisation due to heat loss to air Loosing sensible heat Heat transfer to surroundings 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 44 min 51 min 22 min 15 min 44 min 51 min 22 min 15 min ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS