Heat Transfer Dropwise condensation of steam on cooling surface is promoted None of these An oily surface Only in presence of air When both the steam and the tube are clean None of these An oily surface Only in presence of air When both the steam and the tube are clean ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer occurs by natural convection because change in temperature causes difference in Density Viscosity Thermal conductivity Heat capacity Density Viscosity Thermal conductivity Heat capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Exit fluid temperature = wall temperature Exit-fluid temperature > wall temperature Exit fluid temperature < wall temperature Graetz number > 100 Exit fluid temperature = wall temperature Exit-fluid temperature > wall temperature Exit fluid temperature < wall temperature Graetz number > 100 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally Decreases Increases Increases exponentially Remains unchanged Decreases Increases Increases exponentially Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m².K. The Biot number is 3.5 5.6 0.0035 0.025 3.5 5.6 0.0035 0.025 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Viscosity of gases __________ with increase in temperature. Remain unaffected Decrease slowly Increase very rapidly Increase slowly Remain unaffected Decrease slowly Increase very rapidly Increase slowly ANSWER DOWNLOAD EXAMIANS APP
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