Heat Transfer Radiator of an automobile engine is a __________ type of heat exchanger. Cross-current Direct contact Co-current Counter-current Cross-current Direct contact Co-current Counter-current 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 Radiation heat transfer rates does not depend upon the distance between the heat source and the object receiving the heat type of absorbing surface none of the listed here surface area and temperature of the heat source distance between the heat source and the object receiving the heat type of absorbing surface none of the listed here surface area and temperature of the heat source ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer (Cp . μ)/K is termed as the __________ number. Grashoff Prandtl Stanton Nusselt Grashoff Prandtl Stanton Nusselt ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The sum of reflectivity and absorptivity for an opaque body is equal to 1 2 0.5 1 2 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 1200W/m².K 894W/m².K 333W/m².K 287 W/m².K 1200W/m².K 894W/m².K 333W/m².K 287 W/m².K ANSWER DOWNLOAD EXAMIANS APP
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