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 14.6 kW/m² 11.2 kW/m² 12.0 kW/m² 16.5 kW/m² 14.6 kW/m² 11.2 kW/m² 12.0 kW/m² 16.5 kW/m² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids? At high fluid velocity None of these When fluid flows past a smooth surface At low velocity At high fluid velocity None of these When fluid flows past a smooth surface At low velocity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The value of Stefan-Boltazman constant in SI unit is 5.6697 x 10-8W/m².°K4 5.6697 x 10-8kcal/m² . °K4 0.1714 x 10-8W/m².°K4 0.1714 x 10-8kcal/m². °K4 5.6697 x 10-8W/m².°K4 5.6697 x 10-8kcal/m² . °K4 0.1714 x 10-8W/m².°K4 0.1714 x 10-8kcal/m². °K4 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? 0.6 to 120 l to 50 1 to 103 0.06 to 120 0.6 to 120 l to 50 1 to 103 0.06 to 120 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Logarithmic Arithmetic Either A, B or C Geometric Logarithmic Arithmetic Either A, B or C Geometric ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Finned tube heat exchangers facilitate very large temperature drop through tube wall give larger area per tube are used for smaller heat load use metal fins of low thermal conductivity facilitate very large temperature drop through tube wall give larger area per tube are used for smaller heat load use metal fins of low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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