Heat Transfer In a heat exchanger, one transfer unit means None of these Both A and B A section of the exchanger in which change in temperature of one stream equals the average driving force in the section The size of the exchanger in which heat transfer rate is 1 kcal/hr None of these Both A and B A section of the exchanger in which change in temperature of one stream equals the average driving force in the section The size of the exchanger in which heat transfer rate is 1 kcal/hr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade? 35.5 81.25 48.25 43.75 35.5 81.25 48.25 43.75 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? l to 50 0.6 to 120 1 to 103 0.06 to 120 l to 50 0.6 to 120 1 to 103 0.06 to 120 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 22 min 15 min 44 min 51 min 22 min 15 min 44 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Forced circulation evaporators are normally used for concentrating liquids having Neither A nor B High viscosity Scaling characteristics Both A & B Neither A nor B High viscosity Scaling characteristics Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which one gives the monochromatic emissive power for black body radiation ? Kirchhoffs law Planck's law Stefan-Boltzman law Wien's law Kirchhoffs law Planck's law Stefan-Boltzman law Wien's law ANSWER DOWNLOAD EXAMIANS APP
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