Heat Transfer As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the temperature of the body only none of the listed here wavelength of monochromatic radiation nature of material of body temperature of the body only none of the listed here wavelength of monochromatic radiation nature of material of body 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 55.5 0.55 555 0.15 55.5 0.55 555 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Reynolds Both A & B Grashoff Prandtl & Grashoff Reynolds Both A & B Grashoff Prandtl & Grashoff ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) 0.2 D 0.5 D 0.4 D 0.3 D 0.2 D 0.5 D 0.4 D 0.3 D ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Stefen's block body radiation law can also be derived from __________ law. Kirchoffs Planck's None of these Fourier's Kirchoffs Planck's None of these Fourier's ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe? < 0.1 < 0.5 0.5 > 0.6 < 0.1 < 0.5 0.5 > 0.6 ANSWER DOWNLOAD EXAMIANS APP
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