Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Liquids Solids Gases Both solids & liquids Liquids Solids Gases Both solids & liquids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Small scale evaporation is done in a Multiple effect evaporator Steam jacketed kettle Heat exchanger Condenser Multiple effect evaporator Steam jacketed kettle Heat exchanger Condenser ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances. Geometric mean Product Sum Average Geometric mean Product Sum Average 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? 48.25 81.25 35.5 43.75 48.25 81.25 35.5 43.75 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient Flows outside the tubes Flows through the tube Should not be used as it gives very high pressure drop Can flow either inside or outside the tubes Flows outside the tubes Flows through the tube Should not be used as it gives very high pressure drop Can flow either inside or outside the tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 20 minutes 10 minutes 5 minutes 40 minutes 20 minutes 10 minutes 5 minutes ANSWER DOWNLOAD EXAMIANS APP
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