Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is 1 0 between 0 and 1 >1 1 0 between 0 and 1 >1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Leidenfrost point is a term concerned with the Heat transfer between two highly viscous liquids Condensation of the saturated vapor on a cold surface Boiling of a liquid on a hot surface Concentration of a corrosive solution by evaporation Heat transfer between two highly viscous liquids Condensation of the saturated vapor on a cold surface Boiling of a liquid on a hot surface Concentration of a corrosive solution by evaporation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = k/2h r = h/k r = k/h r = 2k/h r = k/2h r = h/k r = k/h r = 2k/h 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 0.15 555 55.5 0.55 0.15 555 55.5 0.55 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Reason for operating an evaporator in multiple effect is to secure Increased capacity Increased steam economy Decreased steam consumption Both A and B Increased capacity Increased steam economy Decreased steam consumption Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer co-efficient (h1) for liquids increases with Decreasing temperature None of these Increasing temperature Decreasing Reynolds number Decreasing temperature None of these Increasing temperature Decreasing Reynolds number ANSWER DOWNLOAD EXAMIANS APP
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