Heat Transfer The sum of reflectivity and absorptivity for an opaque body is equal to 1 0.5 2 1 0.5 2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second. 3 x l08 3 x l012 3 x l05 3 x l010 3 x l08 3 x l012 3 x l05 3 x l010 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a cooling tower, water becomes cool by Loosing latent heat Vaporisation due to heat loss to air Loosing sensible heat Heat transfer to surroundings Loosing latent heat Vaporisation due to heat loss to air Loosing sensible heat Heat transfer to surroundings ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the emissivity of a black body? 0.9 0.5 1 0.9 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 20 minutes 5 minutes 10 minutes 40 minutes 20 minutes 5 minutes 10 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface. Local Saturated Nucleate Pool Local Saturated Nucleate Pool ANSWER DOWNLOAD EXAMIANS APP
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