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 14.6 kW/m² 16.5 kW/m² 12.0 kW/m² 11.2 kW/m² 14.6 kW/m² 16.5 kW/m² 12.0 kW/m² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the None of these Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall None of these Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when CPA > CPB KA < 0.5kB CPA < CPB KA>2 kB CPA > CPB KA < 0.5kB CPA < CPB KA>2 kB ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Low thermal conductivity of heat insulating materials is due to its High proportion of air space None of these High specific heat Dense structure High proportion of air space None of these High specific heat Dense structure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Planck's distribution law is valid for __________ bodies white all of the listed here coloured black white all of the listed here coloured black ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The most conducive surface for dropwise condensation to occur is the __________ surface. Coated Glazed & polished Smooth Oily Coated Glazed & polished Smooth Oily ANSWER DOWNLOAD EXAMIANS APP
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