Heat Transfer The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law. Kirchoffs Wien's displacement Stefan-Boltzman Planck's Kirchoffs Wien's displacement Stefan-Boltzman Planck's ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m². The flux, when the element temperature is increased to 1000°C for the same furnace temperature is 11.2 kW/m² 16.5 kW/m² 14.6 kW/m² 12.0 kW/m² 11.2 kW/m² 16.5 kW/m² 14.6 kW/m² 12.0 kW/m² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient Flows through the tube Flows outside the tubes Should not be used as it gives very high pressure drop Can flow either inside or outside the tubes Flows through the tube Flows outside the tubes 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 In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be Initially decreases and remains constant thereafter Less than 45°C Equal to 45°C More than 45°C Initially decreases and remains constant thereafter Less than 45°C Equal to 45°C More than 45°C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe ) hi/K 2hi/K K/h0 2K/h0 hi/K 2hi/K K/h0 2K/h0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point elevation of a solution of NaOH Both B and C Is almost independent of pressure Increases rapidly with temperature rise Is almost independent of temperature Both B and C Is almost independent of pressure Increases rapidly with temperature rise Is almost independent of temperature ANSWER DOWNLOAD EXAMIANS APP
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