Heat Transfer Water is normally used as a coolant in the heat exchange equipments mainly because ofits Abundance & high heat capacity Low viscosity High fluidity Low density Abundance & high heat capacity Low viscosity High fluidity Low density 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 555 55.5 0.15 0.55 555 55.5 0.15 0.55 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A diathermaneous substance __________ the thermal radiation completely. Transmits Reflects Absorbs None of these Transmits Reflects Absorbs None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is 1-2 heat exchanger 2-4 heat exchanger 3-2 heat exchanger 1-1 heat exchanger 1-2 heat exchanger 2-4 heat exchanger 3-2 heat exchanger 1-1 heat exchanger ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is Dependent on NRe only 1.66 3.66 88.66 Dependent on NRe only 1.66 3.66 88.66 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The units of resistance to heat transfer is J.m⁻².K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K J.m⁻¹.K⁻¹ J.m⁻².K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K J.m⁻¹.K⁻¹ ANSWER DOWNLOAD EXAMIANS APP
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