Heat Transfer Nucleate boiling is promoted On rough surfaces On polished surfaces In the absence of agitation None of these On rough surfaces On polished surfaces In the absence of agitation None of these 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 0.0035 3.5 5.6 0.025 0.0035 3.5 5.6 0.025 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is 0.55 0.15 555 55.5 0.55 0.15 555 55.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In which mode of heat transfer, the Biot number is important? Natural convection Radiation Transient heat conduction Forced convection Natural convection Radiation Transient heat conduction Forced convection ANSWER DOWNLOAD EXAMIANS APP
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 6.1 1 1.74 37 6.1 1 1.74 37 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer __________ chart is known as transient heat conduction chart. Dirhing's Mollier's Heisler's Cox Dirhing's Mollier's Heisler's Cox ANSWER DOWNLOAD EXAMIANS APP
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