Heat Transfer 1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C. 1.49 None of these 1 4.88 1.49 None of these 1 4.88 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest overall heat transfer co-efficient? Dowtherm Water Molten sodium Air Dowtherm Water Molten sodium Air ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of momentum diffusivity to thermal diffusivity is the __________ number. Nusselt Prandtl Stanton Grashoff Nusselt Prandtl Stanton Grashoff ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient Can flow either inside or outside the tubes Should not be used as it gives very high pressure drop Flows outside the tubes Flows through the tube Can flow either inside or outside the tubes Should not be used as it gives very high pressure drop Flows outside the tubes Flows through the tube 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 0.55 555 0.15 55.5 0.55 555 0.15 55.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the unit of thermal conductivity ? Kcal/hr. °C Kcal/hr.m Kcal/hr. m² °C Kcal/hr.m.°C Kcal/hr. °C Kcal/hr.m Kcal/hr. m² °C Kcal/hr.m.°C ANSWER DOWNLOAD EXAMIANS APP
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