Heat Transfer For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of 1.74 1 37 6.1 1.74 1 37 6.1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is concerned with both heat and mass transfer ? Nusselt number Lewis relationship Froude number Kutateladze number Nusselt number Lewis relationship Froude number Kutateladze number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation of steam on cooling surface is promoted 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 None of these An oily surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer (NRe.NPr)(D/L) is called the __________ number Peclet Stanton None of these Graetz Peclet Stanton None of these Graetz ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number is the reciprocal of Thermal diffusivity x Mass diffusivity Thermal diffusivity x Momentum Thermal diffusivity/Momentum diffusivity Mass diffusivity x Momentum diffusivity Thermal diffusivity x Mass diffusivity Thermal diffusivity x Momentum Thermal diffusivity/Momentum diffusivity Mass diffusivity x Momentum diffusivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the thermal conductivity of most liquids Increases Remains same Decreases First increases upto a certain temperature and then becomes constant Increases Remains same Decreases First increases upto a certain temperature and then becomes constant ANSWER DOWNLOAD EXAMIANS APP
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