Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is More Either more or less ; depends on the nature of vapor Less Some More Either more or less ; depends on the nature of vapor Less Some ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the Temperature of the incoming vapor is very high Condensate is corrosive in nature Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired Temperature of the incoming vapor is very high Condensate is corrosive in nature Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will Increase by 1.8 times Decrease by 22 Increase by 216 Remain unchanged Increase by 1.8 times Decrease by 22 Increase by 216 Remain unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of 'n' is exactly 4 for All bodies A black body Black painted bodies only Polished bodies only All bodies A black body Black painted bodies only Polished bodies only ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Convective heat transfer, in which heat is transferred by movement of warmed matter is described by Fick's law Newton's law of cooling None of these Fourier's law Fick's law Newton's law of cooling None of these Fourier's law ANSWER DOWNLOAD EXAMIANS APP
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