Heat Transfer Nusselt number is the ratio of the Temperature gradient of the wall to that across the entire pipe Heat flux at the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall None of these Temperature gradient of the wall to that across the entire pipe Heat flux at the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) Independent of 't' ∝ √t ∝ t ∝ 1/t Independent of 't' ∝ √t ∝ t ∝ 1/t ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiator of an automobile engine is a __________ type of heat exchanger. Cross-current Counter-current Direct contact Co-current Cross-current Counter-current Direct contact Co-current ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchanger tubes are never made of Stainless steel Plain carbon steel Lead Copper Stainless steel Plain carbon steel Lead Copper ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the emissivity of a black body? 0.9 0.5 1 0.9 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Surface area to perimeter Perimeter to surface area Volume to surface area Surface area to volume Surface area to perimeter Perimeter to surface area Volume to surface area Surface area to volume ANSWER DOWNLOAD EXAMIANS APP
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