Heat Transfer The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns. 0.38-0.78 5-50 0.5-50 100-1000 0.38-0.78 5-50 0.5-50 100-1000 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. Pool Saturated Nucleate Local Pool Saturated Nucleate Local 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. 5 minutes 10 minutes 40 minutes 20 minutes 5 minutes 10 minutes 40 minutes 20 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer (Cp . μ)/K is termed as the __________ number. Grashoff Stanton Prandtl Nusselt Grashoff Stanton Prandtl Nusselt ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Roughening the surface Painting the surface black Giving the surface a mirror finish Painting the surface white (with aluminium paint) Roughening the surface Painting the surface black Giving the surface a mirror finish Painting the surface white (with aluminium paint) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Intermittant tube cleaning is possible to be done in case of a __________ evaporator. Horizontal tube None of these Basket type Calendria Horizontal tube None of these Basket type Calendria ANSWER DOWNLOAD EXAMIANS APP
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