Heat Transfer Which of the following has the highest thermal conductivity ? Water Black Silver Air Water Black Silver Air 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 In Biot number, the characteristic length used is the ratio of the __________ of the solid. Volume to surface area Perimeter to surface area Surface area to perimeter Surface area to volume Volume to surface area Perimeter to surface area Surface area to perimeter Surface area to volume ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes. 10 Either B or C, depends on the mass of the body >10 10 Either B or C, depends on the mass of the body >10 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the temperature gradient at the wall to Temperature difference That across the entire pipe Heat flux None of these Temperature difference That across the entire pipe Heat flux None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number for most of dry gases is about 0.001 150 0.72 70 0.001 150 0.72 70 ANSWER DOWNLOAD EXAMIANS APP
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