Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient Flows outside the tubes Flows through the tube Can flow either inside or outside the tubes Should not be used as it gives very high pressure drop Flows outside the tubes Flows through the tube Can flow either inside or outside the tubes Should not be used as it gives very high pressure drop ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For condensation of pure vapors, if the heat transfer co-efficients in filmwise and drop-wise condensation are respectively hf and hd, then hf > hd hf = hd hf < hd hf could be greater or smaller than hd hf > hd hf = hd hf < hd hf could be greater or smaller than hd ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the 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 None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are Nu, Pr, Re Nu, Gz Re.Gz Nu, Pr Nu, Pr, Re Nu, Gz Re.Gz Nu, Pr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Duhring rule is important in solving problems on Humidification Crystallisation Distillation Evaporation Humidification Crystallisation Distillation Evaporation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 5 minutes 10 minutes 20 minutes 40 minutes 5 minutes 10 minutes 20 minutes ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS